OEM part required 3 classes
Fuel injectors and fuel pump must remain stock as furnished by the manufacturer.
- Fixed Steering Ski Stock · FSSK.4.3
- Runabout Rec Lites · RRL.4.3
- Runabout Stock · RAS.5.3
IJSBA · Fuel
Aftermarket fuel injectors, IJSBA
Injectors that increase fuel flow are treated differently from injectors that increase AIRFLOW.
This page is IJSBA only, and the bodies do not agree. The same part under IHRA. Which one applies to you is decided by whoever sanctions the race you enter.
Where it stands, class by class
14 classes, grouped where the same rule gives the same answer rather than listed one by one, because an answer that holds for a class usually holds for every class that borrows its rules.
What each answer below means
- OEM part required
- This comes off. Only the part the manufacturer fitted is allowed here.
- Not permitted, not listed in the rules
- Treat it as coming off. The class requires the craft to stay stock except where the rules allow otherwise, and this part is not on the list, so this is our reading rather than a rule we can quote at you.
- Legal, with conditions
- Keep it, but measure it: the rules permit this part only inside stated limits.
- Legal
- Keep it. The rules permit this part in this class.
OEM part required 1 class
Replacing fuel injectors is prohibited. · SSK.4.3
OEM part required 1 class
Fuel injectors must remain stock.
- Four Stroke Ski Lites · FSKL
OEM part required 1 class
A four-stroke craft must keep its fuel injectors and fuel pump stock as furnished by the manufacturer. Only a two-stroke entry may fit an aftermarket fuel-injection system, built to the high-pressure hose, fitting and filter rules. · RNA.5.3, RNA.6.3
Not permitted, not listed in the rules 1 class
Not listed in this class document. Illegal under the closed-list principle.
- Ski Modified · SKM
Legal, with conditions 3 classes
Original injectors may be modified to increase fuel flow; aftermarket injectors that increase FUEL flow only. Injectors that increase AIRFLOW are prohibited.
- Ski Superstock · SKSS.5.1
- Ski Grand Prix · SKGP.8.1
- Sport GP · SPGP.6.1
Legal, with conditions 1 class
Permitted, subject to the limits IJSBA applies to every class, namely the sound ceiling, the hull repair tolerance, and the intake grate and sponson dimensions.
- Freestyle · FREST
Legal, with conditions 1 class
Aftermarket injectors giving increased fuel flow but no airflow increase; additional injectors allowed.
- Runabout Open / GP · ROP
Legal 2 classes
Fuel injectors modified or aftermarket.
- Runabout Limited · RAL
- Runabout Superstock · RSS.5.7
Aftermarket fuel injectors: if the rule your class applies reads differently to you, or the rulebook has changed since this was read, ask. We answer with the section we read it from, or that we have not read it. Ask a rules question.
Every IJSBA class · where the rulebooks differ · checks on parts the shop sells · how this site reads a rulebook.
Fuel · four stroke · legal in 7 of 14 answered, 5 with conditions