UIM 2013 P750 User manual

560 - INFLATABLE BOATS (P)
UIM Class: P750 –THUNDERCAT RACING
AMENDMENTS INCLUDING 2013 DEROGATION CHANGES ARE IN RED:
560 UIM TITLES & TEAMS
561 CLASSES & HULLS Diagrams A, B & C
562 MACHINERY
563 MODIFICATIONS
564A TECHNICAL
564B GENERAL RACING REGULATIONS AND RULES –Diagram D, E and F
564C ADDITIONAL REGULATIONS FOR SURF DISCIPLINE
564D ADDITIONAL REGULATIONS FOR CIRCUIT DISCIPLINE
564E ADDITIONAL REGULATIONS FOR LONGHAUL DISCIPLINE
Diagram G –Guidance to Surf Course
Diagram H –Guidance to Circuit Course
Abbreviations and dossier of terms:
UIM –Union Internationale Motonautique; World Governing body of powerboat racing
Pre Scrutineering –At the beginning of the event
Safety Scrutineering –Carried out when required or between each discipline
Post Scrutineering –At the final heat of the discipline
Final Inspection –Inspected and measured to ensure legality
Pilot –The person in control of the engine, steering, throttle and gears. (The same as a Driver)
Co-Pilot –The second person in the boat. (The same as a Co-Driver)
Please note there are further definitions throughout the rules.
UIM RULES: www.uimpowerboating.com, clickto RULES - then CIRCUIT - No: 560 page 305 –564 page 338
Other UIM rules apply but do not supersede class specific rules:
Code of Ethic
Anti-doping.
Environmental Code.
Group 100 rules.
Group 200 Rules
Group 400 Rules

560 –UIM TITLES & TEAMS
560.01 –TITLES / TEAMS
UIM World Championship must have at least two of the three classes to be contended at a UIM World titled event and to include all 3 disciplines at a single
event over the duration of a minimum of 7 days, including 2 lay-days. No single discipline will be recognised for any UIM Title. All three disciplines must enjoy
equal points awarding system. Continental Title may be held in one class only under a minimum 4 day event
WORLD AND CONTINENTAL CLASSES
Rule:
STOCK (S):
PRO STOCK (PRO):
MODIFIED (M):
UIM World & Continental Class
YES
YES
YES
560.02 –O.O.D (Officer of the Day)
The UIM will approve the O.O.D for all UIM titled events. Main Officials must have experience in P750 Racing (Safety Officer, Timing and Technical)
560.03 - PRIZE PRESENTATION
Prize presentation at UIM Titled events must be a ttended by all participants. Only the O.O.D can sanction a non-attendance.
560.04 - MINIMUM BOATS NUMBERS AND NATIONAL AUTHORITIES
A minimum of three boats will constitute a valid class. For a UIM Titled event the minimum number of boats per class must be six and a minimum of three
different countries (National Authorities).
560.05 - LICENCE DETAILS
All Pilots and Co-Pilots must hold a current International race licence for P750Class issued by their own Na tional Authority for International championships and a
National licence as per driver or co-drivers National Authorities rules and regulations to compete nationally. UIM Rules 120.01, 120.02, 120.03, 120.04, 120.05,
120.06, and 120.07 will apply. Note: Competitors taking prescribed medication must complete the UIM ‘Therapeutic Use Exemptions TUE ‘Form. For further
information go to the UIM website –Anti Doping or contact your National Authority.
560.06 - FINAL INSPECTION
The organisers must ensure that at least the winning boatand engine are inspected and measured to ensure legality. It is optional to inspect or measure other
boats in second and third place or any other boat. UIM Rules 321.05 will apply.
560.07 - TEAMS
Team = the designated Pilot and a Co-Pilot can contestthese championships. In the event of a Co-Pilot being injured a replacement of the Co-Pilot only is
permitted in all disciplines if:
A doctor/Paramedic’s certificate is produced stating that the injury of the Co-Pilot.
The O.O.D is satisfied with the doctor/paramedic’s report.
The replacement co-driver has the complete current paperwork including a current international license.
No Co-Pilot can be changed during a heat, race or leg.
The Pilot is the person in control of the engine, s teering, throttle and gears
The Co-Pilot is the second person in the boat who is not the Pilot
The Co-Pilot does not have to be of the same Nationality of the Pilot.
560.08 - MINIMUM AGE
Age refers at the date of the event.
TEAM
STOCK (S)
PRO STOCK (Pro)
MODIFIED (M)
Min Age of Pilot
16
17
18
Min Age of Co-Pilot
16
16
16
560.09 - BEHAVIOUR
No abuse of officials will be tolerated. Any pilot, co-pilot or team members found guilty by admission, or by the jury, will result in the pilot/co-pilotbeing
disqualified from the heat or discipline or total event. Only the O.O.D. or the UIM Commissioner can take this action. After a finding of gross infringement of the
rules or a gross breach of good manners or sportsmanship, not covered by the above rule, the O.O.D. and/or the Race Jury mayexclude a competitor from a
heat/discipline or the whole event.
560.10 - PROTESTS
All protests, jury formation, sanctions, appeals are to be as the Rules Group 400 (as with all other UIM classes). A Team / Pilot canonlyprotestanotherTeam /
Pilot if they are in the same race.
560.11 –PROTEST FEE
The protest fee must be announced in the advance programme. Protest fee: maximum of 80 Euros or equivalent in host’s currency .
560.12 - ALCOHOL/DRUGS
Alcohol or drug abuse will result in a total ban from the event (see rule 205.02.02 / 03). Note:Competitors taking prescribed medication must complete the UIM
‘Therapeutic Use Exemptions TUE ‘Form. For further information go to the UIM website – Anti Doping or contact your National Authority.
560.13 –INSURANCES
All Pilots and Co-Pilots must abide byanymandatory medical and insurances carefully setout in the advance programme. Any costs charged by th e organisers
for supplying the same, must also be stipulated in the advance programme Max 90 Euros or equivalent in host’s currency.
560.14 –PENALTIES/YELLOW/RED CARDS
Yellow/Red cards: see rules 406 these rules will be strictly enforced. They only apply to bad behaviour on the water at the O.O.D’s and UIM commissioner’s
dis cretion. Other penalties are available for bad behaviour on land and ra cing infringements. [See Rule 406.05]
560.15 - DRIVERS BRIEFING
Any Pilot/co-Pilot failing to a ttend any drivers briefing without prior consent from the O.O.D will be disqualified a t the discretion of the O.O.D

560.16 - SAFETY EQUIPMENT
HELMETS: For all racing helmets must be open faced or full faced motorbike helmets given toprotect the skull base and cover the ears.At least 50% (area) of the
helmet must be of fluorescent orange, red, yellow or international orange colour. The helmet colours must be bright enough to be clearly visible in the water.
The wearer is entirely responsible for the efficiency of his helmet. The organisers are recommended to repeat this important rule in their advance programme
and their race instructions. As per rule 205.07
LIFEJACKETS: The efficiency of the lifejacket is the sole responsibility of the wearer who must be assured that it conforms to the UIM r ules and carries indelible
confirmation of this. Buoyancy: A lifejacket mus t have a minimum of 7.5 kg solid buoyancy for a person weighing up to 60 kgs and 9 kgs of buoyancy f or those
over 60 kg. A back support is highly recommended. As per rule 205.06
CARRIED SAFETY EQUIPMENT: Safety equipmentas specified in each discipline must be carried at all times. Failure to do so will involve penalties as described in
the relevant discipline. The boat number must be marked on all safety equipment.
EYE PROTECTION: Eye protection is mandatory in the Circuit and Surf discipline and advised for Long-haul. This protection can be goggles or helmet visor.
CLOTHING: All limbs mustbe covered at all times. Gloves optional
561 - CLASSES/HULLS
561.01 - DISCIPLINES
M Shape (Surf); Circuit and Long-haul
561.01 –HULLS
561 –HULLS
Number
Rule:
STOCK (S):
PRO STOCK (PRO):
MODIFIED (M):
.011
Engine Capacity
Up to 750cc
Up to 750cc
Up to 750cc
.012
Minimum hull length
3.8m
3.8m
3.8m
.013
Minimum hull width
1.7m
1.7m
1.7m
.014
Minimum hull weight
153kg
153kg
153kg
The above mentioned weights are the minimum weight of a complete rig, weighed directly after the race without crew and their personal equipment orresidual
water, without fuel tanks. To reach the minimum weight, ballastcan be added. This must be s crewed or bolted securely to the inside of the boat, but not
exceeding 10% of the weight of the complete rig without ballast.
561.02 - HULL DESIGN
All boats must be of a tunnel hull design and conform to the original manufacturer’s catalogue. THE FLOORBOARDS CAN BE SUPPLIED BY AN ALTERNATIVE
MANUFACTURE BUT MUST CONFORM TO RULE 561.04. All boats must be fitted with a serial numberplate issued by the manufacturer on either the nose cone
or preferably the transom, showing the Model, Make, Date of Ma nufacture and if possible the maximum allowed horsepower of any relevant engine. A
minimum number of 2 boats must have been made, advertised for sale and are commercially available before the model canbe accepted to race. All boats must
conform to the following measurements:
SKETCHES:
Measurements Number 4: minimumof 0.26m. Rear Transom to ground: Between Hi -jackers at rearmeasured at nearest points: Number 8: Minimum of 1.05m.
Overall width front transom (measurement taken a t back of nose cone).Other measurements to be a dded by agreement
HULL DIAGRAM A:

HULL DIAGRAM B:
HULL DIAGRAM C:

561.03 –INFLATION OF HULLS
They can only be inflated with atmospheric air and must have 3 independent compartments, except for pencil type boats where each pontoon must have2
independent compartments. The boatmust be able to float evenif one compartment is not functioning.
561.04 - DEFINITION OF HULLS
All boats should be able to deflate, to collapse, foldable or to be able to be rolledup, so thatno dismantled part has a length greater than1/3 of the full length
of the infla ted boat including floorboards. No aerodyna mic appendages are allowed
561.05 –MODIFICATION ABOVE THE WATERLINE
Certain modifications above the waterline are allowed, these modifications will refer to foot straps,handles,loop patches only and not modifications that
interfere with the original dimensions of the boat. A waterline is defined as the line taken when the boat is ready to race but without the Pilot/Co-Pilot. The
waterline will be below the bottom of the transom if a multi-hull type. No part of the hull can be used for water ballast.
561.06 - SPLASHPLATE
A splash plate may be fitted to the back of the transom as long as it complies with Rule 561.05 plus the following dimensions:If this plate runs the full length of
the tra nsom, i.e. From pontoon to pontoon, then the width of this plate is restricted to 100 mm. If the width of this plate e xceeds 100 mm then its length is
restricted to 150 mm across the back of the transom, but may protrude as far back as the engine as required.
561.07 –MODIFICATION BELOW THE WATERLINE
Modifications below the waterline: Planing batons andstrakes may be attached to the planing surface of the hijackers. Construction spray strakes are permitted
anywhere on the outside of the hijacker cover.
561.08 - WINDOWS
Boat numbers can be painted or enclosed in twotransparent covers, meeting the correct size and clearly visible. Rule:561.09
561.09 - RACE NUMBERS
Must be at the bow of the boat a minimum of 18 cm x 3cm with a 2 cm border round the number and on the engine cover must be 18 cm x 3 cm with a 2 cm
border around the number. Their colour must be black letters on a white background.
561.10 - RIGHTING ROPES
All boa ts must be fitted with two designated righting ropes/webbing. These ropes/webbing must not share common use. They must be a t least 10 mm thick
[rope] and the webbing minimum 25 mm wide. All boats mustbe fitted with a 4 meter length of similar material as a designated bowline, spliced or stitched eye
at the end. The bowline must be fixedto the nose cone in a pouch glued/fixed to the nosecone. Bowline mustnot be tied up in other ropes of the boat and must
be easily accessible to be able to hook into the towing point on the bottom side of the nose cone. Towing points must be in t he middle of the nosecones.Any
towing point must be capable of pulling 300 kg.
561.11 - SPONSORS
The GRP bow of boat must be available for event sponsor’s decals; failure will result in not passing scrutineering – requirements must be stated in Advance race
instructions and stickers supplied by organisers. Cowling stickers may be supplied bythe event organisers but must supply with t he correct boatnumber
regis tered a nd agreed when entering champions hip.
562 –MACHINERY
MACHINERY
No.
RULE
STOCK (S):
PRO STOCK (PRO):
MODIFIED (M):
.1
Engines must be homologated using the UIM specifications.
The only outboard engines allowedin these classes are:
1.Tohatsu 50 D2
2.Yamaha 50H per
original UIM
homologation
1.Tohatsu 50 D2
2.Yamaha 50H
per original UIM
homologation
1.Tohatsu 50 D2
2. Yamaha 50H
Both modified according
to the rules.
.2
No other engine will be permitted until the UIM
(Cominsport Group) homologate a “low emission”
compatible engine for P750 style racing .Introduced min. 3
years after homologation.
YES
YES
YES
.3
Low idle –engines must be capable of functioning at low
speeds
YES
YES
YES
.4
Wa ter Pick-up –external water pick-ups wherever/however
attached.
Are forbidden
Are forbidden
Free.
.5
Control Handle (Gear) –An efficient control handle giving
forward, neutral and backward movement is manda tory.
The control handle for a functioning reverse gear must be
within easy reach of the driver.
YES
YES
YES
.6
KILL SWITCHES:
The manual starter must ensure a quick and easy start with
no external aids. The engine must be fitted with a “kill
switch”, operated with a lanyard no longer than 1.3 meters.
The lanyard mustbe strong and very firmly fixed to the
Pilot. A second “kill switch” lanyard must be firmly attached
to the Co-Pilot at all times.Lanyard failure / kill switch
failure Will result in disqualification from the relevant
race/heat or long-haul discipline. Refer to Rule: 563.29
YES
YES
YES

562.07 - IRREPAIRABLE DAMAGE/DAMAGED HULL/ENGINE/LOWER UNIT
If a boat, engine, or any part thereof becomes irreparable through a racing incident on the water during a discipline, then: The hull may be replaced. The engine
may be replaced. The engine canbe re-built. The underwater unit may be replaced. All subject to official inspection and official authorization before any
attempt is made on repla cement or repairs.
The hull, engine or any part thereof that is damaged beyond repair cannot be replaced during the actual heat be ing raced Exceptions: An irreparable hull can
only be replaced by another if the OOD decides another competitor was responsible for the damage caused only during a race or training on the water. Any
da maged part of the engine can be replaced with s imilar except the cylinder block. Underwater units that are da maged beyond repair can be changed provided
they have the same gear ratio and from a similar homologated engine.
All cha nges mus t be s anctioned and s upervised by the Scrutineer or a n appointed official. All dama ged pa rts including hulls must be kept in a secure place for
any official inspectionor pending possible protests.Any equipment subsequently found to be repairable will result in the driver being eliminated from the
complete event. All costs pertaining to the stripping of additional equipment will be the responsibility of the competitor in question. A fee, as specified in the
adva nce programme, must be paid to cover the inspection of a ny protested engines or equipment. These charges should be reason able. When different
disciplines are held on different days and no fullysecure compound is available either overnight or days then all boats must be re-scrutineered before racing re-
commences. Failures will result in the loss of all previously gained points.
562.08 –GEARBOX
Gearbox must not be interfered with or modified in Stock and Pro Stock Classes. Any normalwear and tearon the fin/skeg shall be limit ed to5mm and must be
seen to be racing wear and tear; all fins/skegs will be measured and must comply at Pre Scrutineering of each discipline. If illegal the team will be disqualified if
unable to change priorto that heator Long-haul discipline. A stainless steel cover, with the same characteristics as an original gearbox, can be used to protect
the leading edges.
563. - MODIFICATIONS
MODIFICATIONS
No.
RULE
STOCK (S):
PRO STOCK (PRO):
MODIFIED (M):
.1
Replacement:
The replacement of nuts or the additionof lock nuts,
drilling and wiring, split-pinning orkeying is allowed
provided the screw and pins are simila r.
As per Stock Class
As per Stock Class
.2
Gear interlock
The gear interlock device on the starter may be
removed.
As per Stock Class
As per Stock Class
.3
Steering:
The steering bar and brackets maybe re-enforced
and additional steering bar may be mounted. The
steering bars mustbe able to tilt independently from
the motor. Strengthening of transombracket and
lower leg are permitted.
As per Stock Class
As per Stock Class
.4
Engine locking
Engine locking brackets may be removed.
As per Stock Class
As per Stock Class
.5
Engine cowling
The engine cowling maybe secured by means other
than or in addition to the standard means.
As per Stock Class
May be altered to increase air
flow a nd secured by means other
than or in addition to the
standard means.
.6
Tell-tale
Tell-tale cooling pipe may be replaced with another
pipe or other characteristics.
As per Stock Class
Free
.7
Splash plate
A splash plate may be fixed to the trunk of the motor
as long as it is not rigid and that it is fitted above the
cavitation plate.
As per Stock Class
As per Stock Class
.8
Crankshaft
The crankshaft may be welded orpinned as long as
the dimensions of the crank after welding do not
exceed the original manufactures dimensions and
weight for crankshaft. Holes maybe drilled in the
crankshaft to reduce weight. It is not allowed to
reduce the diameter of the crankshaft
As per Stock Class
No res trictions on welding
AS PER STOCK CLASS
.9
Propellers:
The original propeller maybe replaced by any other
three blade propeller; provided that it has a through
the hub exhaust. The locking nut, s pacer, adaptor,
split pin, thrush washer/ washers are free for the
securing of the propeller; Re-bushing and keying of
propellers are allowed. No holes or ventilation slots
of any nature whatsoever are allowed in the hub or
blade. No spacing out of propeller to allow venting.
Propeller must enter gearbox housing by a minimum
of 1mm. Transgression of this rule will lead to
disqualification.
As per Stock Class
Free
.10
Re-boring
Re-boring is allowed as per UIM homologation
specifications. Parts must be as supplied bythe
origina l manufacturer. No aftermarket parts can be
fitted. Oversize pistons can be fitted providing the
total cc’s does not exceed 750cc.
As per Stock Class
Allowed up to a max of 750cc

.11
Ports
When ports in cylinders are adjusted to the
dimensions specified in the homologationsheet,
material may only be removed in the specified
opening to a depth of 10mm not including liner, to
match the shape of the original adjacent connecting
passage (channel) outside the adjusted port
opening. This also applies to other openings in the
motor for which the dimensions a re specified in the
homologation sheet. Should the modified port
window be smaller than the track, the track may not
be tampered with.
As Stock Class
Free
.12
Parts
No part of the engine can be changed with another
manufacture’s or pirate part, except for the tiller
arm. Tiller arm bracket, gear change lever
As per Stock Class
Pa rts may be changed with
another manufacture
.13
Air box
Maximum of 1 x 6 mm hole may be drilled in the
lowest part of the air box to allow water to drain
from it.
As per Stock Class
As per Stock Class
FREE
.14
Spark plugs
Original complete spark plugs and HT leads may be
replaced.
As per Stock Class
As per stock Class
.15
Auto lube &
engine mounts
All auto lube and anyrelevant parts may be
removed. Engine mountings may be replaced with
rigid or rubber mounts with similarcharacteristics.
As per Stock Class
As per stock Class
.16
Throttle lever
Springs may be added to the throttle lever of the
carburettors
Tohatsu D1 Throttle camcan be used on the Tohatsu
D2 Engine.
As per Stock Class
Free
.17
Emulsion tubes
Emulsion tubes are to be standard “off the shelf”
items and have the same pre-requisites as the jets.
No modifications are allowed to these parts
As per Stock Class
FREE
.18
Baffle plate
Baffle plate or other fuel surge preventative
measures can be taken in carburetor fuel bowls.
As per Stock Class
As per Stock Class
FREE
.19
Steering
It’s allowed to change bearings with similar
cha racteristics. Steering dampers may be fitted.
Steering by a tiller armis required.
As per Stock Class
As per Stock Class
.20
Reeds
Standard reeds only as supplied bythe manufacturer
for the specific model of engine
Reeds only are free.
The stoppers must not
be removed.
Free
.21
Machining:
Skimming, grinding or machining is allowed as long
as it meets the UIM homologation measurements.
As per Stock Class
Free
.22
Starters:
Electric starters are not allowed.
As per Stock Class
As per Stock Class
.23
Thermostats:
Thermostats of the cooling circuit may not be
removed.
As per Stock Class
FREE
.24
Revolution
limiters:
Rev Limiters, heat sensors and lighting coils must
not be removed. Rev limiter wire connections must
be continuous and must be s oldered to achieve this.
Anything tha t might restrict the rev limiter in its
proper function will be classed as an infringement of
this rule. Ignorance of the above will not be
accepted as a defence and the competitor will be
disqualified.
Can be removed
Can be removed
.25
Jets:
Jets have tobe to the UIM homologation
specification.
Free
Free
.26
Weight of part:
A part, the weight of which is quotedin the
homologation sheet, may be machined for the
specific purpose of reaching the quoted weight only.
It is not allowed to change the flywheel, but balance
machining is allowed if the dimensions and weights
are still correct
As per Stock Class
No res triction on weights quoted

.27
Measurements:
Measurements not quoted in the homologation
sheet may not be altered in any form whatsoever. If
details cannot be verified with the aid of the pictures
in the homologationsheet, then the part in question
must be compared physically to a similar, but stock
part for the relevant engine
For the Tohatsu D2engine exhaust port only: There is
a casting mark on the inside of the engine exhaust
port that does vary in size from engine to engine.
This casting mark can be reduced no less than
0.5mm this will be considered tobe a breach of the
technical rules and can be disqualified.
As per Stock Class
Measurements not quoted in the
homologation sheet may be
altered
.28
Altering parts:
Only pa rts where the dimens ion is quoted in the
homologation specification may be altered for the
purpose of reaching that specific measurement. The
shape of the parts cannot change e.g. The shape of
the cylinder head squish pan} The Block height
measured from the centre line to the top of the
block is a llowed, a ll measurements a ccording to UIM
homologation papers
As per Stock Class
Parts may be changed by another
manufacture
.29
Kill Switch:
It is not allowed to exchange kill switches from one
manufacturer to another. The toggle type switch
that can be activated without the insertion of the
“curly cord” is forbidden. Refer to rule 562.6
As per Stock Class
It is allowed to exchange kill
switches from one manufacturer
to another. However, the toggle
type switch that can be activated
without the insertion of the
“curly cord” is forbidden
.30
Exhaust trunk
No modifications
As per Stock Class
Holes may be drilled or cut into
the exhaust trunk but no external
appendages maybe added
.31
Gear Box
See rule: 562.08
See rule:562.08
Bullet or racing gearboxes are
allowed in this class only.
.32
Protrusions
No protrusions other than standard are allowed.
As per Stock Class
As per Stock Class
.33
Exhaust box
No protruding expansion exhaust box
As per Stock Class
As per Stock Class
.34
External water
pick-up
Not allowed
As per Stock Class
Are allowed
563.34 - FUEL
Stock and Pro Stock Class: Fuel must be a commercially available grade of automobile unleaded fuel to a maximum of 99 octane, freely available from any
normal petrol station. To maximise the equality of competition and to simplify the checking of conformity, the organisers must arrange the supply of the same
fuel for all competitors at all UIM titled events. It does not necessarily have to be free of charge.
Modified Class: Only fuel to a maximum of 102 octanes is allowed. This includes Avgas.
Banned Fuel: Special racing fuels, methanol, nitro-methane and the likes thereof are expressly forbidden. The use of additives aimedat increasing the power of
the engine is prohibited to either the fuel or the air intake. The use of nitrous oxide injection is also totally prohibited.
563.35 FUEL DETAILS AVAILABLE:
The Pilot/Co-Pilot maynot withhold the type of fuel/oil used if requested by race officials.
563.36 - OIL
A sample sealed container of the oil used, will be supplied by the competitor with unbroken seal, and then held by th e organisers for the duration of the event in
the event of fuel tests. It is a recommendation that Bio-degradable oil should be used to assist in the reduction of the environmental impact of the sport. No
power enhancing oil is allowed.
563.37 - FUEL TANKS
Only the original fuel tanks as supplied with the engine, collapsible fuel cells or approvedmarine manufacturers tanks are a llowed.
563.38 - FUEL MIX
No Pilot / Co-Pilot may withhold the type of fuel/oil used and the mixing ratio if requested by officials.
564 A - TECHNICAL
TECHNICAL
No.
564A.
RULE
STOCK (S):
PRO STOCK (PRO):
MODIFIED (M):
.1
Pistons
Where a dimension is quoted on a piston, metal may be
removed to reach a specific weight, provided the
dimensions are maintained. Should there still be an
excess of weight, this may be removed from the inside of
the piston i.e. the inside of the skirt or the area where
the gudgeoned pin goes through
As per Stock Class
N/A

.2
Flywheel
Holes maybe drilled in the flywheel to reduce weight. It is
not allowed to reduce the outside diameter or to reduce
the thickness at a ny point. A pa rt, the weight of which is
quoted in the homologation sheet, may be machined for
the specific purpose of reaching the quoted weight only.
It is not allowed to change the flywheel, but balance
machining is allowed if the dimensions and weights are
still correct.
As per Stock Class
As per Stock Class
FREE
.3
Conrods
It is allowed to reduce the overall weight of the Conrods
by removing the flashing on the shank of all three rods to
atta in the weight specified provided for in the
homologation specifications
As per Stock Class
As per Stock Class
.4 +
Electrical
components
It is forbidden to remove any excess wiring;heat sensors
modify coils, to rewire coils or other components, to
tamper with CDI units or to add any electrical
components (starter etc.) or any other part thatis not
standard original part.
It is allowed to remove any
excess wiring i.e. heat
sens ors, rev limiters, low oil
sensors etc. It is forbiddento
modify coils, to rewire coils
or other components, to
tamper with CDI units or to
add any electrical
components (starter etc.) or
any other part that is not
standard original part.
As per Stock Class
FREE
.5
Head Volume
It is allowed to encroach into the squish panarea in the
skimming process as long as the minimum combustion
chamber is maintained. It is not allowed, should this
minimum be exceeded, to remove the metal within the
squish pan area to regain the lost volume. Measurement
of the head volume will be taken with the head removed
from the block.
As per Stock Class
No restrictions
.6
Head Volume
Measuring
procedure and
modification of
engine Ports
The head volume is measured off the block, using a glass
pla te of minimum 3 mm thick. A burette calibrated in 50
cc increments to be used with a paraffin/oil mix of 50/50.
All head volumes to be taken with the spark Plug as used
and correctly fitted. The head is measured with no
gasket. All old gasket material is allowed to be cleaned
off. It is also allowed to clean all carbon deposits in the
head. The glass plate must be sealed with a thin layer of
marine grease
When ports in cylinders are adjustedto the dimensions
specified in the homologation sheet, materia l may only
be removed in the specified opening to a depth of 10mm
not including liner, to match the shape of the original
adjacent connecting passage (channel) outside the
adjusted port opening. This alsoapplies to other
openings in the motorfor which the dimensions are
specified in the homologation sheet. Should the modified
port window be smaller than the track, the track may not
be tampered with.
As per Stock Class
No restrictions
.7
Throttle advance
On various models, it is allowedto change the position of
the throttle cable link pin onthe advance cam. It is not
allowed to modify the cam itself or change the radius on
the cam. [See 563.16.]
As per Stock Class
Free
.8
Cost of inspection
Costs may not be claimed in the case of a mandatory
inspection by race authority. The maximum costs that
may be claimed, by a driver from a protestor, should the
equipment found to be legal, are as follows:
LABOUR: Time ma y only be claimed to a maximum of six
hours at a rate to be determined by their local class
association or National Authority. Any excess will be
borne by the owner of the equipment. The above cost
excludes the cost of gaskets requiredor lubes which may
only be changed as per the recommended grade in the
workshop manual. Freight charges, where applicable, will
be charged as per the standard international ra tes.
As per Stock Class
As per Stock Class
.9
Technical
inspections
The O.O.D. or official scrutineer will be in charge. Only
the following may attend the post-race engine
inspections regardless of a protest being lodged. The
O.O.D - UIM commissioner - Measuring Officer - Driver
and his mechanic (or representative) - Protestor or his
representative - Any other person the O.O.D. requires,
with his permission. Note that in the case of a protest,
the protestor’s duty is to ensure that the inspection
complies with his protest requirements. He may not
however physicallyinspect the parts himself and should
not be allowed within a 5m radius of the equipment.
As per Stock Class
As per Stock Class

.10
Sta nda rd Part
In the circumstances where weights and measurements
are not quoted nor listed in the homologation sheets
then comparative parts ma ybe used to determine
legality.
As per Stock Class
As per Stock Class
.11
Fuel
See rules 563.34 fuel regulations. Rule 563.36 Oil to be
supplied by competitor unless otherwise specified
As per Stock Class
To a max of 102 octanes is
allowed this includes AV
Gas.
.12
Over blended or
spark eroded
engines
Engines not conforming to UIM and manufacturers
homologation specification with regardto the blend rule
and that have had tract widening done by any method
inclus ive of spark eroding, will only be allowed to
compete in the modified class.
As per Stock Class
As per Stock Class
.13
Post-race
inspection
The post-race inspection is tobe a complete inspection
and is not to be limited to any specific area. Pos t-race
ins pection s hould mainly be about speed and power
enhancing matters.
As per Stock Class
As per Stock Class
.14
Failure to appear
Any competitor refusing to have his racing equipment
inspected for legality at any reasonable time during the
whole event will be disqualified.
As per Stock Class
As per Stock Class
.15
Non OEM parts
In the case where original parts are not available,
permission must be obtained from the UIM
Cominsport touse substitute components. Such a
request must be in writing. Any outboa rd motors that
have superseded engine parts listed by the manufacture,
supplied from the factory and confirmed in writing by the
UIM Cominsport may be used. It is not allowed to
interchange parts from one homologated model to
another unless specified. OnlyD2 parts can be used in a
Tohatsu D2 engine except for the D1 throttle cam.
As per Stock Class but for the
Tohatsu D2 engine the
D1exhaust tube maybe used
in this class.
Pa rts may be changed with
another manufacturer.
564 B - RACING REGULATIONS AND RULES
RACING REGULATIONS AND RULES
No.
564B
Rule
The M ‘Shape (Surf)
Circuit
Long-haul
.1
Race Course:
Shown diagrammaticallyin diagram D as a guide
only. Starts can be from the beach or deep water
starts.
Note: There does not have to be breaking Surf in
order to engage this discipline. Although it mus t take
place on a suitable beach. If the water conditions are
flat then the O.O.D has the right to enforce the
circuit start rule where teams must keep their racing
lines till around the first buoy.
Shown diagrammaticallyin
Diagram E. This is a guide only,
the course can change shape
due to the size of the water
available. The start is from a
pontoon (Jetty) unless not
available. Course andsize must
be shown in the advance race
instructions
Should be run over a maximum
distance of 150kms to a
minimum of 80kms. Minimum
lap distance of 10kms and should
be area bound. The organisers
must provide a boat/s prior to
the race to show teams the
course by water, explaining any
safety issues.
Ultra Long-haul:
Over 150kms. The organising
National Authoritywill provide
an extended list of extra rules for
the event, including race
regulations that should be read
in conjunction with the UIM
Rules. This event can be staged
over several days having
individual legs.
.2 .
0
2
Wet Driver:
(man
overboard)
If any Pilot or Co-Pilot lands completely in the water
or a boat get stuck on the beach during racing, the
race will be stopped immediately, even before the
red flag is flown. All competitors must stop, then
come off the plane, clear the course a nd proceed to
the start line with extreme caution or as stated in
Drivers Briefing.No re-fuelling, or changing set-up
and get ready for an immediate re-run. The boat
causing the stoppage is not allowed in any re -runs of
that heat. Penalties are carried forward to any re-
run/start of that heat. Any boat that gets stuck on
the beach may only re-start with the O.O.Dʼs
permission. If more than 2/3 of the race or re-
start/run race has been completed then no re-run is
required. Restart can be from the beach or deep
water start.
As per Surf except all restarts
and re runs take place from the
jetty/pontoon or beach and
rule 564D.05 (Re-Run)
Only if required by the OOD the
Red Flag will be raised; the race
will not stop if someone goes
into the water in this discipline.