Reference

By symptom

Indexed by what the machine is doing, not by what the part is called. A symptom appears here only when something is written that addresses it.

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Bogs just off idle

• What pop-off pressure actually is Carburettor

Bogs off the line

• What an impeller pitch number actually means Pump

Compression test reads lower than expected

• Compression and octane are one decision Engine

Detonation after a head or dome change

• Compression and octane are one decision Engine

Engine screams, ski does not move

• What an impeller pitch number actually means Pump

Failed inspection over trim tabs

• What is actually legal in IJSBA Ski Lites Class rules

Fine on race fuel, breaks on pump gas

• Compression and octane are one decision Engine

Flat spot in the midrange

• What an aftermarket exhaust pipe actually does Exhaust

Fouls plugs repeatedly

• What a spark plug can and cannot tell you Ignition

Hard to restart when hot

• What pop-off pressure actually is Carburettor

Holed a piston

• Compression and octane are one decision Engine

Lean surge before it comes on the pipe

• What pop-off pressure actually is Carburettor

Loads up and blubbers at low speed

• What pop-off pressure actually is Carburettor

Lost bottom end after fitting a pipe

• What an aftermarket exhaust pipe actually does Exhaust

Need to know what a closed list means for parts nobody mentions

• What is legal in UIM Ski GP3, and what the rulebook does not say Class rules

New plug fixes it for one session

• What a spark plug can and cannot tell you Ignition

Not sure whether aftermarket reeds are legal in GP3

• What is legal in UIM Ski GP3, and what the rulebook does not say Class rules

Not sure whether reeds are allowed in a stock class

• What is actually legal in IJSBA Ski Lites Class rules

Not sure which vintage class my build fits

• Vintage Ski against Vintage Ski Limited, the same ski and opposite answers Class rules

Over-revs and loses drive in chop

• What an impeller pitch number actually means Pump

Pings or rattles under load

• Compression and octane are one decision Engine

Plug comes out wet with fuel

• What a spark plug can and cannot tell you Ignition

Plug looks white, glazed or blistered

• What a spark plug can and cannot tell you Ignition

Pulls hard but only in a narrow band

• What an aftermarket exhaust pipe actually does Exhaust

Racing UIM rather than a domestic series

• What is legal in UIM Ski GP3, and what the rulebook does not say Class rules

Revs out but will not reach top speed

• What an impeller pitch number actually means Pump

Runs hot since the exhaust changed

• What an aftermarket exhaust pipe actually does Exhaust

Same ski, two classes, different answers

• Vintage Ski against Vintage Ski Limited, the same ski and opposite answers Class rules

Told at tech that my pipe is not legal

• What is actually legal in IJSBA Ski Lites Class rules

Told my ignition is illegal in one class but not the other

• Vintage Ski against Vintage Ski Limited, the same ski and opposite answers Class rules

Told the exhaust must be entirely original

• What is legal in UIM Ski GP3, and what the rulebook does not say Class rules

Want to know what I am actually allowed to change

• What is actually legal in IJSBA Ski Lites Class rules

Want to know why one class is called Limited

• Vintage Ski against Vintage Ski Limited, the same ski and opposite answers Class rules