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
- Four Stroke Ski Lites · FSKL.4.2
IJSBA · Fuel
Aftermarket electric fuel pump, IJSBA
Global cap of 4 psi with mandatory auto-stop. Manual on/off switches are prohibited everywhere.
This page is IJSBA only, and the bodies do not agree. The same part under IHRA and UIM. Which one applies to you is decided by whoever sanctions the race you enter.
Where it stands, class by class
20 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.
- The rules do not say
- Unanswered. The rules do not settle this, so ask the club before you rely on it.
- 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 the fuel pump is prohibited. · SSK.4.3
OEM part required 1 class
The fuel pump and fuel injectors must remain stock as furnished by the manufacturer, and the two-stroke fuel section lists no pump change either. · RAS.1.1, RAS.5.3
Not permitted, not listed in the rules 1 class
Not listed in this class document. Illegal under the closed-list principle.
- Ski Lites · SKL
The rules do not say 1 class
Not stated in the Vintage Ski Limited rules. VSKL.1.1 carries the Stock class provisions into this class unless one of its own rules says otherwise, so the answer is the Stock one. · VSKL.1.1
Legal, with conditions 2 classes
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.
- Vintage SC · VSC
- Vintage X2 · VX2
Legal, with conditions 2 classes
Max 4 psi, automatic shutoff.
- Vintage Ski · VSK.4.2
- Ski Grand Prix · SKGP.4.3
Legal, with conditions 1 class
Two-stroke only, max 4 psi.
Legal, with conditions 1 class
Max 4 psi with automatic shutoff.
- Sport Spec · section headings, no numbered rules
Legal, with conditions 1 class
Max 4 psi. · FREST.4.2
Legal, with conditions 1 class
Four-stroke craft may use aftermarket fuel pumps that stop automatically when the engine stops; two-stroke craft may use modified or aftermarket electric pumps of no more than 4 psi, also with automatic shutoff. · SPGP.6.1, SPGP.7.2
Legal 2 classes
Aftermarket fuel pumps allowed; must auto-stop when the engine shuts down.
- Ski Superstock · SKSS.5.1
- Runabout Open / GP · ROP.5.1
Legal 1 class
Aftermarket fuel pumps allowed. · SKM.5.2
Legal 1 class
A four-stroke fuel pump may be modified or aftermarket if no hazard is created, with a fuel return line fitted in the pump assembly without modifying the tank, and a two-stroke electric pump may be aftermarket up to 4 psi and must stop with the engine. · RAL.5.6, RAL.6.2
Legal 1 class
Fuel pumps and fuel pressure regulators may be modified or aftermarket provided a hazard is not created, and a fuel return line must be fitted in the pump assembly without modifying the tank. · RSS.5.6
Aftermarket electric fuel pump: 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 · two and four stroke · legal in 13 of 20 answered, 8 with conditions