Mercedes-Benz WICK 375 User manual

TABLE OF CONTENTS
WICK 375™ PUMP
1.0 GENERAL DESCRIPTIONS........................................................................................................................................................................................ 1
1.1 ABOUT THE WICK 375™ .......................................................................................................................................................................................... 1
1.2 SPECIFICATIONS ....................................................................................................................................................................................................... 1
2.0 OPERATING INSTRUCTION ..................................................................................................................................................................................... 2
2.1 WATER HOOK-UP & PRIMING................................................................................................................................................................................. 2
2.2 FUELLING / OIL TYPE............................................................................................................................................................................................... 2
2.3 STARTING ................................................................................................................................................................................................................... 2
2.3.1 COLD START................................................................................................................................................................................................... 2
2.3.2 WARM OR HOT START.................................................................................................................................................................................. 2
2.3.3 OTHER STARTING CONDITIONS................................................................................................................................................................. 2
2.4 SHUTTING DOWN THE ENGINE.............................................................................................................................................................................. 3
2.5 PERFORMANCE VS. ENGINE LIFE.......................................................................................................................................................................... 3
2.6 FUEL MIX SCREWS (CARBURETOR ADJUSTMENT)........................................................................................................................................... 3
2.7 ELECTRONIC LOSS OF PRIME HIGH SPEED CUT-OUT SWITCH....................................................................................................................... 3
2.8 SHUT-OFF CONDITIONS........................................................................................................................................................................................... 3
3.0 MAINTENANCE.......................................................................................................................................................................................................... 4
3.1 AIR CLEANER............................................................................................................................................................................................................. 4
3.2 STARTER SCREEN..................................................................................................................................................................................................... 4
3.3 SPARK PLUG............................................................................................................................................................................................................... 4
3.4 MUFFLER SCREWS.................................................................................................................................................................................................... 4
3.5 FUEL INLET FILTERS................................................................................................................................................................................................ 4
3.6 PUMP DISASSEMBLY................................................................................................................................................................................................ 5
3.7 PUMP ASSEMBLY...................................................................................................................................................................................................... 6
3.8 STORING MOTOR....................................................................................................................................................................................................... 7
3.9 PUMP GREASE............................................................................................................................................................................................................ 7
3.10 SPARK ARRESTOR (OPTIONAL)........................................................................................................................................................................ 7
4.0 TROUBLESHOOTING................................................................................................................................................................................................. 8
5.0 PARTS LIST............................................................................................................................................................................................................... 10
5.1 ENGINE PARTS......................................................................................................................................................................................................... 10
5.2 ENGINE MOTOR PARTS.......................................................................................................................................................................................... 12
5.3 CARBURETOR.......................................................................................................................................................................................................... 14
5.4 CARBURETOR ADJUSTEMENT SCREWS............................................................................................................................................................. 16
5.5 PUMP END ASSEMBLY........................................................................................................................................................................................... 17
5.6 COVER ASSEMBLY ................................................................................................................................................................................................. 18
5.7 HARDWARE ASSEMBLY........................................................................................................................................................................................ 19
5.8 THROTTLE LEVER ASSEMBLY............................................................................................................................................................................. 20
5.9 FILTER BOX ASSEMBLY (pt. no. 71W-1985A does not include items 10, 11, 12).................................................................................................. 21
5.10 ENGINE / FRAME MOUNTING.......................................................................................................................................................................... 22
5.11 FUEL CONNECT ASSEMBLY............................................................................................................................................................................ 23
5.12 CUT-OUT SWITCH RETROFIT KIT (71W37-COR).......................................................................................................................................... 23
5.13 BASIC WIRING / CUT-OUT SWITCH................................................................................................................................................................ 24
6.0 WINTER STORAGE .................................................................................................................................................................................................. 25
7.0 WARRANTY FOR WICK 375™ WATER PUMP..................................................................................................................................................... 26
7.1 COVERAGE............................................................................................................................................................................................................... 26
7.2 REMEDIES................................................................................................................................................................................................................. 26
7.3 EXCLUSION .............................................................................................................................................................................................................. 26
Oct 2015

1
1.0 GENERAL DESCRIPTIONS
1.1 ABOUT THE WICK 375™
The WICK 375™is the culmination of modern pump and engine design resulting in unsurpassed performance that will
prove to be the future standard of portable fire pumps. The 10 HP, 210cc modern 2-stroke Solo engine is coupled to a
detachable 4-stage foam-compatible pump using a one piece stainless steel clamp. This pump has the best performance
of all pumps in its class, and is capable of moving water over long distances. It is applicable in situations where long
hose lays, high pressures, and high performance is required. The following are highlights of some of its features:
User friendly and easy pull-starting.
Detachable rewind starter for emergency rope start.
Low tone muffler which significantly reduces noise.
Standard Mercury style fuel quick-connect.
Electronic over-speed protection cut-out switch (U.S. pat #6,298,820, other patents pending).
Note: USDA Qualified to meet Specification 5100-274C
1.2 SPECIFICATIONS
Pump
Horizontal, 4 stage, detachable centrifugal pump
Suction: 2" N.P.S.H.
Discharge: 1 ½" N.P.S.H.
Overall dimensions
Length: 22.75" (57.8 cm.)
Width: 14.25" (36.2 cm.)
Height: 14.25" (36.2 cm.)
Weight: 56 Lbs. (25.4 kg.)
Engine
Solo two-cycle, air cooled engine.
Spring rewind, manual pull starter.
High speed cutout switch (for loss of prime).
Displacement: 210 cc.
Ignition: Flywheel magneto / solid state breaker less
Power: 10HP
Cylinder: Nikasil treated
Fuel Mix: 24:1 (call manufacturer for any variance)
Spark Plug: Bosch W5AC / NGK B7HS / Champ. L77J
Spark Plug Gap: .021 inch / .53 mm

2
2.0 OPERATING INSTRUCTION
2.1 WATER HOOK-UP & PRIMING
1. Connect foot valve strainer to suction hose.
2. Fill suction hose with water.
3. Connect suction hose to pump and ensure coupling is tight.
4. Prime pump with hand primer or by jogging foot valve up and down under the water until water comes out of
discharge. Ensure foot valve is neither touching bottom of river or lake or too close to the surface to draft air.
5. When pump is equipped with an integral hand primer, open priming valve located on top of pump before
priming.
6. When water is ejected from the top of hand primer, close priming valve.
7. Attach discharge hose.
CAUTION: DO NOT RUN PUMP WITHOUT WATER INSIDE
Note: Be sure priming valve is closed before starting engine.
2.2 FUELLING / OIL TYPE
1. Attach “quick connect” fuel line to coupling on unit.
2. Fuel Mix: Using a high quality gas and two stroke oil (meeting class TC), mix fuel to oil at a 24:1 ratio
(consult manufacturer for any variance).
3. When mixing, pour a small amount of gasoline into tank, add all the oil required and stir, then add the
remaining fuel to the tank and stir again.
2.3 STARTING
2.3.1 COLD START
See FUELLING instructions above
1. Place ignition switch to “On” position.
2. Close choke >> Turn lever to Start position
3. Position the throttle lever in the “Start Warm-up” position.
4. Pull starter grip slowly until resistance is felt, then pull upwards firmly and quickly.
5. Do not allow the grip to snap back into place. Guide it back to the resting position.
6. When the engine tries to start (generally after 2-3 pulls, not more than 5 pulls) push the choke in.
7. Continue pulling until engine starts. (Engine will not run in choke position.)
Note: The choke should be pushed in after the slightest "pop" or attempt to start. In this respect, 2-cycle
engines start much differently than automotive type engines.
2.3.2 WARM OR HOT START
Follow the Cold Start instructions but leave the choke open (in the off position).
2.3.3 OTHER STARTING CONDITIONS
When starting a new Wick 375TM, or if the unit ran out of fuel, the primer bulb should be pressed until fuel can
be seen inside the transparent tube under the carburetor. Follow normal starting procedures.
If the engine does not start during very hot weather or with hot fuel from a prior operation, start with a “Closed
Choke” and a “Low Speed Throttle Setting” until firing occurs, then open the choke.
If all other starting procedures fail, hold the throttle wide open, use no choke, and pull over repeatedly to clear
fuel vapour and start engine.

3
2.4 SHUTTING DOWN THE ENGINE
1. Move throttle to idle position (down).
2. Allow unit to idle for ½ - 1 minute.
3. Move switch on fan cowl beside carburetor to Off/Stop position.
4. After removing suction and discharge hose, drain pump by lifting unit and rotating in two directions.
CAUTION: PUMP MUST BE PROTECTED FROM FREEZING
2.5 PERFORMANCE VS. ENGINE LIFE
While this pump unit is capable of delivering extended high performance when needed, it is highly recommended to run
at reduced throttle setting when possible, as this will greatly extend the life of the engine. Maximum throttle for best
longevity is "3/4-7/8 throttle".
2.6 FUEL MIX SCREWS (CARBURETOR ADJUSTMENT)
This engine is equipped with adjustable fuel mix screws for low speed and high speed. This is to allow operators to
adjust for different altitudes.
While it is difficult to fine tune an engine without a cylinder head temperature gauge, a general setting can be done by
finding the maximum speed and enriching the mixture by 1/4 turn counter clockwise, thus the speed should reduce.
Usually this setting is 1-1/8 turns out from closed.
CAUTION: Extreme caution should be used when adjusting the high speed mixture screw. By setting this screw for
maximum speed it is possible to damage the engine due to excessive heat.
Note 1:The idle speed screw (while not as critical) should be set to 1 turn out, or depending on altitude adjust for best
starting, but never less than 3/4 turns out.
Note 2:Should the high speed screw be turned out (c.c.w.) past 1-1/8 and no noticeable drop in RPM occurs, there could
be a blocked fuel filter in line or a blocked interior fuel screen. This should be cleaned or replaced to prevent
overheating.
2.7 ELECTRONIC LOSS OF PRIME HIGH SPEED CUT-OUT SWITCH
The Wick 375™ is equipped with a patented "Electronic Cut-Out Switch" to prevent damage to the unit from loss of
prime For instance, should a substantial amount of air enter the suction side of the pump, the engine will increase in
speed and at over 7300RPM the cut-out switch will stop the engine, then automatically reset after 3 seconds.
Note 1: There is no manual reset required before re-starting the engine, and no adjustments are required.
Note 2: Use only original parts when servicing the engine. Do not substitute components since this could affect the
performance and criteria of the cut-out switch.
2.8 SHUT-OFF CONDITIONS
Running the pump at shut off for long periods (no water flow but under pressure - ie with hose clamped off), will cause
excessive heat to build up and possibly damage the seal and components. If shut off is unavoidable, allow 2 gallons per
minute to flow to carry heat away from pump. Ensure that pump is set up with water as per 2.1.
Note: Do not run pump at shut-off (no water flowing / high pressure) longer than 2 minutes.

4
3.0 MAINTENANCE
3.1 AIR CLEANER
Under ordinary operating conditions, the air cleaner should be cleaned daily. However, under extremely dirty
conditions, more frequent cleaning is recommended. To clean the air cleaner, remove nut on intake housing, remove
foam filter, brush off large debris, rinse in mineral spirits until clean, squeeze out remaining liquid and reinstall. Ensure
backup screen is installed next to carburetor before installing foam.
IMPORTANT: Dirt that enters the engine through the carburetor is one of the greatest causes of engine wear.
Therefore, it is very important that the air cleaner be serviced regularly.
3.2 STARTER SCREEN
The screen keeps debris, etc., from entering the fan housing and clogging the air cooling passages. Because this engine
is air-cooled, it is necessary to keep this screen clean at all times to permit the unrestricted passage of air into the fan
housing.
3.3 SPARK PLUG
Check and clean spark plugs regularly (every 15 hours of operation). A fouled, dirty or carboned spark plug causes
difficult starting and poor engine performance.
3.4 MUFFLER SCREWS
Re-torque the muffler to cylinder screws after the first 4 hours and check every 15 hours after. Torque to 18.5 ft. lbs.
Check torque on the muffler mount bracket studs after 4 hours and every 15 hours after. Torque value 12 ft lbs.
3.5 FUEL INLET FILTERS
Every 50 hours or if engine shows sign of overheating; the fuel inlet filters should be checked. When engine is running
at full speed, back out the high-speed jet (c.c.w) 1/4 - 1/2 turn, the engine should slow down immediately. If it does not,
there could be debris blocking the fuel screens. Change inline fuel filter first and retest. If performance remains the
same open carburetor and clean interior screen.

5
3.6 PUMP DISASSEMBLY
For illustrative purposes refer to drawing in section 5.5
1. Remove the 6 Bearing Retaining Screws (17) located under the Drive Collar (8)
2. Remove Screw (23) and Shaft Nose (22) from the suction end of the shaft.
3. Remove the 8 Screws (14). The Suction Cover(6) can now be pulled off {use Puller tool, 79T-1207}.
4. Using a small screw driver (or pick), pry tab of Lock Washer (21) from Shaft Nut (12).
5. Remove Shaft Nut (12) {use Shaft nut wrench, 79W -1665P} and remove the Lock Washer (21)
6. Remove the 1st Impeller (5)
7. The Shaft (7) can now be pressed through the pump:
a. Support the pump {withPump body support tool, 79T -1966}.
b. Protect the small end of the Shaft (7) from damage {using Shaft protector tool, 79T -1313}.
c. Press the Shaft (7) completely through {usingShaft removal pin tool, 79T -1967}.
8. The inner Components can now be pressed out from the bearing end:
a. Invert the pump {on thePump body support, 79T -1966}.
b. Note that the parts inside have to be guided during this operation {use Imp Dist removal tool, 79T -
1964}.
c. A manual press is preferred, as it allows the mechanic to feel the components passing through the
inside contour of the body.
9. Remove the Seal (11) by inverting the pump {again on the Pump body support, 79T-1966} and pressing from
the inside of the Pump Body {use Seal removal tool 79T -2706}.
IMPORTANT: DAMAGE to internal components can result from incorrect procedures.
Note 1: If seal is to be reused cushion the seal when dropping out of the body, as dropping on a hard surface may cause
damage.
Note 2: Special tools are needed to service the pump. See 79T-KIT illustration below.

6
3.7 PUMP ASSEMBLY
Note: Inspect all components for wear, damage or corrosion. Replace components as required. Always use new "O"
Ring Seals.
1. Place Body (1) on smooth surface or {use Shaft fitting base, 79T-1965) to protect the body from damage, then
press in the Rotary Seal (11) into Body (1).It is important that it be installed correctly, if leakage or damage to
the body is to be avoided {use Seal installation tool, 79T -1963}.
2a. Place Bearing Retainer (8) over Shaft (7) with small shoulder facing up. Support shaft under aluminum collar
between drive pins. Then place Bearing (10) onto shaft pilot and press into place, until it touches aluminum shaft
collar. Press on bearing inner race only {use Bearing press removal tool, 79T-2709}
Note: Pressing on bearing outer race (ring) may damage bearing.
2b. Install Drive Bushing (9) on Shaft (7) and press into place over the flats on the pump Shaft (7). The Drive
Bushing faces should touch the inner race of the bearing.
3. Press in the Shaft Sub-assembly (7), making sure that the drive pins in the Drive Bushing (9) fit into the slots
on the seal to align shaft {use Shaft fitting base, 79T-1965}. Secure with the 6 Bearing Retainer Screws (17).
Note: In some models, lock washers are also used.
4. Place the No.4 Impeller (4) on the Shaft (7), making sure it engages with the Drive Bushing slots (9).
5. Use grease to hold the O Ring (15) in its groove on the Distributor (2) and carefully install over the Impeller.
Ensure it is located in the lowest counter bore of the Body.
6. Place the No. 3 Impeller (4) on the shaft making sure it engages Impeller No 4.
7. Install O rings (16) on Distributors (3) and lubricate with Vaseline.
8. Place distributor on the pump body bore (vanes pointing up) {using Dist. assy. tool, 79T-1208},and with a
hand press, apply short stokes until the distributor is pressed through the first flat section into the open
waterway. (This can be felt as the distributor free falls onto the next flat.)
The distributor must then be re-centered by hand and repressed as before. This is repeated until the distributor
is in contact with the first distributor already installed.
9. Place the No. 2 Impeller (4) on the shaft making sure it engages Impeller No 3.
10. Repeat operation No. 7 –No. 8.
11. Place the No.1 Impeller (5) on the shaft making sure it engages Impeller No 2.
12. Place Lock Washer (21) over Shaft (7) engaging tab in the milled slot in the shaft thread.
13. Screw Locknut (12) onto Shaft (7) and tighten firmly {use Shaft nut wrench, 79W-1665P} until slot in nut is
aligned with a tab from the Lock washer. Push tab into slot on nut to lock in place.
14. Install O ring (16) on Suction Nozzle (6). Using bench press, press Suction Cover until it rests on Distributor
(3). (.020 to .040” gap between Body (1) and Suction Cover (6) is normal.)
15. Install 8 Lock washers (19) and Screws (14) and tighten evenly, by hand.
16. Attach Shaft Nose (22) to end of Shaft (7) using screw with special plastic locking insert (23).
17. If required, install Priming Adaptor (26). Use Loctite on tapered thread.
18. Install Cap (27) and Gasket (29).
19. Install Plug (28).
Note: Apply Teflon paste or tape on threads before installing plug.
20. Grease the Pump Bearing, using an 11” (280mm) long grease gun. Apply 15 strokes of grease (PT# 79W-
GREASE).
The Pump is now ready for testing.
Note: After testing, the Pump should be re-greased as a small amount of water may have passed through the
seal during the first few seconds of rotation. Apply 2 strokes from the grease gun.

7
3.8 STORING MOTOR
The following steps should be taken to prepare your engine for storage.
1. Disconnect fuel line.
2. Start engine and allow to run until it stops from lack of fuel. This will use up all the fuel in
the carburetor and prevent the formation of deposits due to evaporation of fuel.
3. Drain all fuel from the gasoline tank.
4. Remove spark plug and pour approximately 1/4 cup of motor oil into cylinder. Replace
spark plug.
5. Crank engine two or three times to distribute oil throughout cylinder. This will coat the
cylinder walls with oil and prevent rust from forming during the storage period.
3.9 PUMP GREASE
1. Pump must be greased every 30 hours of operation.
2. Use a high quality LOW temperature bearing grease (only use fresh clean grease) >> Part No 79W-GREASE
IMPORTANT: DO NOT USE GRAPHITE.
3. Clean fitting on pump before applying grease.
4. Pump grease slowly until fresh grease appears around bearing retainer (Page 14, Item 8).
5. Wipe off excess grease before running pump.
3.10 SPARK ARRESTOR (OPTIONAL)
When pump unit is fitted with an optional spark arrestor, the spark arrestor should be checked for blockage every 75
hours. (The time interval will vary with the type of fuel/oil mix).
1. Remove metal screw on outlet tube of muffler and pull screen assembly out.
2. Remove carbon deposit build-up from screen (if needed, scrape with a plastic tool to remove build-up).
3. Be careful not to damage the screen.
4. Scrape inside of outlet tube if needed and replace screen assembly and screw

8
4.0 TROUBLESHOOTING
CAUSE
RECOMMENDATION
Engine fails to start.
Stop switch off.
Turn to the ON/RUN position.
No fuel in tank.
Fill tank.
Gasoline shut-off closed.
Open shut-off valve.
Fuel line or fuel tank screen clogged.
Clean fuel line and screen.
Flooded.
Disconnect fuel line and open throttle full with choke open, then crank engine
to start, reconnect fuel line and throttle back to idle.
Spark plug shorted or fouled.
Install new spark plug.
Spark plug broken (cracked porcelain
or electrode is broken).
Install new spark plug.
Magneto lead wire short broken or
disconnected from spark plug
Replace lead wire or attach to spark plug.
Magneto inoperative (no spark from
lead wire).
Contact the factory or your nearest authorized dealer.
Engine hard to start.
Water in gasoline or stale fuel mixture.
Drain entire fuel system and refill.
Too much oil in fuel mixture.
Drain and refill with correct mixture.
Engine over or under choked.
If flooded by over choking, proceed according to instructions in previous
section. If under choked, move choke lever to closed position and crank 2 or 3
times.
Carburetor out of adjustment.
See Fuel Mix Screws, section 2.6.
Gasket leaks (carburetor or reed plate
gaskets).
Replace gaskets.
Weak spark at lead wire.
Contact the factory or your nearest authorized dealer.
Engine misses.
Dirt in fuel line/carburetor
Remove and clean.
Carburetor improperly adjusted.
See Fuel Mix Screws, section 2.6.
Spark plug fouled, broken or incorrect
gap setting.
Clean or replace spark plug and set gap as per spec.
Weak or intermittent spark at lead wire
Contact the factory or your nearest authorized dealer.
Engine lacks power.
Air cleaner clogged.
Clean air cleaner.
Carburetor out of adjustment.
See Fuel Mix Screws, section 2.6.
Muffler clogged.
Clean carbon from muffler.
Clogged exhaust ports.
Remove muffler, rotate engine until the piston is at bottom of cylinder. With a
wooden scraper or blunt tool, remove all carbon from exhaust ports. Be
careful not to scratch or damage piston or cylinder walls. Blow any loose
carbon with compressed air. Start engine and run briefly to remove all carbon,
then install muffler and gasket.
Poor Compression
Contact the factory or your nearest authorized dealer.
Blocked Filter inline or inside
carburetor
Change inline filter or dismantle carburetor and clean screen
Engine overheats.

9
Insufficient oil in fuel mixture.
Mix fuel as shown in starting instructions.
Air flow obstructed.
Clean flywheel and cylinder fins and screen.
Improperly adjusted high speed mix screw.
Adjust, see section 2.6.
Blocked Filter inline or inside carburetor
Change inline filter or dismantle carburetor and clean screen
Engine noisy or knocking.
Loose flywheel.
Tighten flywheel.
Spark plugs incorrect heat range.
Replace with plugs specified for engine.
Worn bearings, piston rings or cylinder walls.
Contact the factory or your nearest authorized dealer.
Bent fan housing.
Remove fan housing and straighten bent portion.
Engine "stalls" under load.
Carburetor main adj. too "lean".
See Fuel Mix Screws, section 2.6.
Engine overheats.
See above.
Blocked Filter inline or inside carburetor
Change inline filter or dismantle carburetor and clean screen

10
5.0 PARTS LIST
5.1 ENGINE PARTS

11
ITEM
PART NO.
DESCRIPTION
QTY/ASSY
1
71W37-1976B
Muffler
1
2
72PSO10-0010138
F.H. Screw 18.5 ft-lb
2
3
72PSO10-0034115
Tension washer
2
4
71W37-1321
Exhaust Gasket
2
5
72PSO10-2043119
Air guide plate, exhaust side
1
6
71W37-2164
Intake Gasket
1
7
72PSO10-2043118
Air guide plate, carb side
1
8
72PSO10-0062229
O-Ring - Intake
1
9
72PSO10-2300540
Manifold
1
10
72PSO10-0030131
Washer
2
11
72PSO10-0034115
Tension washer
2
12
72PSO10-0010137
F.H. Screw 4 ft-lb
2
13
72PSO10-0075101
Key –Shaft, Woodruff
1
14
72PSO10-0072148
Tension washer
2
15
72PSO10-0018326
F.H. Screw 1.5 ft-lb
2
16
72PSO10-2300798
Rotor Ducati Assy (old model)
1
16
72PSO10-2300102
Rotor Ducati Assy (new model)
1
16A
72PSO10-ARMASSY
Stator Plate c/w Coils
1
16B
72PSO10-RING102
Magnet, Flywheel
1
16B
72PSO10-RING798
Magnet, Flywheel (Old Model)
1
17
71W37-1597-O
Fan, Flywheel (w/ Item 16 old)
1
17
71W37-1597
Fan, Flywheel (w/ Item 16 new)
1
18
72PSO10-0035101
Safety washer
1
19
72PSO10-0021102
Flywheel Nut (Loctite 242)
1
20
72PSO10-2600305
Starter assembly complete
1
21
72PSO10-0020102
Hex. Nut 7 ft-lb
1
22
72PSO10-26030509
Spring washer
1
23
72PSO10-26030507
Friction plate
1
24
72PSO10-26030506
Starter pawl
1
25
72PSO10-26030511
Spring
1
26
72PSO10-26030508
Pressure washer
1
27, 28
72PSO10-26030503
Starter pulley & spring
1
29
72PSO10-26030501
Starter housing
1
30
72PSO10-26030504
Starter grip
1
31
72PSO10-26030505
Starter rope
1,09m
32
72PSO10-0034114
Spring ring
4
33
72PSO10-0012114
Hex. Screw 10 ft-lb
4
34
72PSO10-2013207
Fan cover
1
35
72PSO10-0034202
Tension washer
4
36
72PSO10-0028111
Hex. Nut, self-securing 9.5 ft-lb
4
37
72PSO10-0018348
F.H. Screw 9.5 ft-lb
4
38
72PSO10-2042872
Intermediate plate
1
39
72PSO10-0018347
F.H. Screw 15 ft-lb
3
40
78WL05P
Lockwasher
8
41
78SC0830MP
Screw 15 ft-lb
4
42
71W37-1606
Exhaust bracket
1
45
72PSO10-0034115
Tension washer
2
46
72PSO10-0020208
Hex. Nut, self-securing 12 ft-lb
2
47
72PSO10-0065224
Thread sleeve
3
49
72PSO10-0015283
Stud bolt 3 ft-lb
2
50
72PSO10-0072144
Tension washer
2
51
72PSO10-0028137
Hex. Nut 1.6 ft-lb
2
52
71W37-SPWR07M
Spark Plug Wire 7mm dia.
1
53
72PSO10-0084203
Protection Cap
1
54
72PSO10-2300527
Spark plug cap
1
55
72PSO10-0062230
O-Ring - Intake
1
56
71W37-COILOS
Ignition Coil Assembly
1
57
71W37-CO
Electronic Cut-Out Sw (Not ill.)
1
* Same part number

12
5.2 ENGINE MOTOR PARTS

13
ITEM
PART NO.
DESCRIPTION
QTY/ASSY
1
72PSO10-2100883
Crankcase
1
2
72PSO10-0015208
Stud bolt
4
3
72PSO10-0034128
Spring washer
4
4
72PSO10-0020109
Hex. Nut 15 ft-lb
4
5
72PSO10-0010225
F .H. Screw
6
6
72PSO10-0034114
Spring ring
6
7
72PSO10-0020102
Hex. Nut 10 ft-lb
6
8
72PSO10-0054177
Oil seal
2
9
72PSO10-0050118
Ball bearing
2
10
72PSO10-2200780
Crankshaft
1
11
72PSO10-0031251
Friction washer
2
12
72PSO10-0052167
Needle bearing
1
13
72PSO10-0055187
Circlip
2
14
72PSO10-2031534P
Piston pin
1
15
72PSO10-2200587
Piston with rings
1
16
72PSO10-2048266
Piston rings
2
17
72PSO10-2061288
Cylinder foot gasket
1
18
72PSO10-2011688
Cylinder
1
19
72PSO10-2061303
Cylinder head gasket
1
20
72PSO10-0015206
Stud-Cylinder Head
6
21
72PSO10-0072143
Tension washer
6
22
72PSO10-0028100
Nut-Head Thermag 10 Ft.lbs
6
23
71W37-W5AC
Spark plug
1
24
72PSO10-0012114
Hex. Screw/Plug
1
25
72PSO10-0061254
Sealing ring
2
26
72PSO10-0067101
Nipple Fuel Pump
1
27
71W37-2190
Grommet Muffler Side
1
28
72PSO10-2061287
Crankcase gasket
1
29
72PSO10-0066107
Grommet
1
30
72pso10-0075101
Key
1
31
72PSO10-2012759
Cylinder Head
1
32
78NL121.5MS
Low Nut M12-1.5
1
33
78WL12MP
Lockwasher M12
1

14
5.3 CARBURETOR

15
ITEM
PART NO.
DESCRIPTION
QTY/ASSY
22.82
Venturi (mm)
71W37-CARB
Carburetor (Complete)
71W37-CARB-SASK
Carburetor (Complete) for Saskatchewan Government
72PSO10-K20WGA
Kit-Repair (Incl. Needles, O-Ring, Screen, Gasket,
Diaphragm)
1
Repair Kit
Ring - Screen Retainer
1
2
72PSO10-1673
Ring - Shaft Retainer
2
3
72PSO10-1675
O-ring - Needles
2
6
72PSO10-21199
Cover-Metering Diaphragm
1
7
72PSO10-213027
Cover - Fuel Pump
1
8
72PSO10-301165
Shaft Assembly-Throttle
1
9
72PSO10-34272
Valve - Throttle
1
10
72PSO10-40942
Shaft Assembly-Choke
1
12
72PSO10-62158
Valve-Choke
1
13
72PSO10-8275
*Valve-Inlet Needle
1
14
72PSO10-86736
Nozzle Assembly-Check Valve
15
Repair Kit
Screen - Check Valve
1
16
Repair Kit
Plug - Cup
1
17
72PSO10-88171
*Plug-Welch (5/16)
18
72PSO10-8913
Ball-Choke Friction
1
19
72PSO10-9294
**Gasket-Metering Diaphragm
1
20
72PSO10-92293
**Gasket-Fuel Pump
1
21
72PSO10-95120
**Diaphragm-Fuel Pump
1
22
72PSO10-95537
**Diaphragm Assy.-Metering
1
23
72PSO10-96156
Screw-Metering Lever Pin
1
26
72PSO10-96449
Screw-Idle Adjust Kit
1
27
72PSO10-96543
Screw-Fuel Pump Cover
4
28
72PSO10-96564
Screw-Throttle Valve
1
29
72PSO10-96564
Screw-Choke Valve
1
30
72PSO10-96589
Screw-Metering Cover
4
31
72PSO10-98192
Spring-Metering Lever
1
32
72PSO10-98162
Spring-Choke Friction
1
33
72PSO10-98368
Spring-Needle (idle)
1
34
72PSO10-98368
Spring-Needle (power)
1
35
72PSO10-983062
Spring Throttle Return
1
38
72PSO10-1023005
Needle-Idle
1
39
72PSO10-1023006
Needle-Power
1
41
72PSO10-136106
Washer-Needle
2
43
72PSO10-14070
*Screen-Fuel Inlet
1
45
72PSO10-14460
*Pin-Metering Lever
1
46
72PSO10-16655
*Lever-Metering
1
13A
72PSO10-84603
Governor-kit
41A
72PSO10-136194
Washer-Throttle Shaft
1
Not Illus.
78FL03FF
In Line Fuel Filter 3/16"
1
Not Illus.
71W37-FILKIT
Replacement filter kit , WICK-375A (incl. filter & Tygon
fuel line)
*, ** Contents in Repair Kit (72PSO10-K20WGA)

16
5.4 CARBURETOR ADJUSTEMENT SCREWS

17
5.5 PUMP END ASSEMBLY
ITEM
PART NO.
DESCRIPTION
QTY/ASSY
1
79W128
Pump Body
1
2
79W126
Distributor
1
3
79W129
Distributor
2
4
79W127
Impeller
3
5
79W1211
Impeller
1
6
79W1212A
Suction Cover
1
7
79W122C
Shaft Assembly
1
8
79W123
Retainer
1
9
79W124AS
Drive Bushing
1
78ORI-017N
O-RING SEAL
1
10
79W1248
Bearing
1
11
79W1228T
Seal
1
12
79W1250
Nut
1
13
79W1240
Bushing
1
14
78SF042809S
Screw
8
15
79W1226
O-Ring
1
16
79W1227
O-Ring
3
17
79W1225
Screw
6
18
79W1217
Buffer Coupling
1
19
78WL04SS
Lockwasher
8
20
79W1224
Lockwasher
6
21
79W1249
Lockwasher
1
22
79W1213
Shaft Nose
1
23
78SF042812S
Screw
1
24
79W1229
Grease Fitting
1
25*
79W1287
Extension
1
26
6108TM24PM
Priming Adaptor
1
27
79W1210
Priming Cap
1
28
6402TMPLG
Plug
1
29
5924FGPS
Gasket
1
30*
79W1962
Priming Cap Retainer
1
31*
79W-GREASE
Grease
1
32
78SS1032045
Plug 10-32 x 1/4, cup point
1