IJSBA · Driveline

Aftermarket nozzle trim system (pump-mounted)

Distinct from hull trim tabs. Judged under the driveline rules, not the trim-tab rules.

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This is one body's answer, not the sport's. You are bound by whichever body sanctions the event you enter, and where both govern you, you are held to the stricter of the two. The differences are set out in the rulebook comparison.

Where it stands, class by class

20 classes, grouped by the answer rather than listed one by one, because an answer that holds for a class usually holds for every class that borrows its rules.

Not permitted, not listed in the rules Our reading, not a rule we can quote at you. This class requires the craft to stay stock except where the rules allow otherwise, and this part is not on the list.

Not permitted, not listed in the rules 7 classes

Not listed in this class document. Illegal under the closed-list principle.

• Fixed Steering Ski Stock · FSSK
• Runabout Rec Lites · RRL
• Ski Stock · SSK
• Vintage Ski Limited · VSKL
• Four Stroke Ski Lites · FSKL
• Runabout Stock · RAS
• Ski Lites · SKL

The rules do not say 1 class

Not addressed in this class document.

• Ski Modified · SKM

Legal, within limits 1 class

Two-stroke only.

• Runabout Naturally Aspirated · RNA

Legal 10 classes

Explicitly permitted by this class document.

• Sport Spec · none - this document uses ALL-CAPS section headings, not numbered rules
• Runabout Limited · RAL
• Vintage SC · VSC
• Vintage X2 · VX2
• Runabout Superstock · RSS
• Vintage Ski · VSK
• Freestyle · FREST
• Ski Grand Prix · SKGP
• Sport GP · SPGP
• Runabout Open / GP · ROP

Legal 1 class

SKSS.6.1

• Ski Superstock · SKSS

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Aftermarket nozzle trim system (pump-mounted): 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 · signed checks on parts the shop sells.