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Peconic

10-22-2003 06:19 PM

What is a jackshaft?

Ignorant as I am: What is a jackshaft in performance boating, and why should I have one?

I know jack about the shafts. Is it simply a shaft that connects the engine with the drive?

Ted G

10-22-2003 06:42 PM

Yes

Very similar to the drive shaft on a car-may be supported in the middle by a bearing if it's long.

Peconic

10-22-2003 06:52 PM

Gotcha, Ted. Thanks! BTW, those center bearings are sometimes also used to stop the shaft from beating everything to death if a coupling breaks ...

Ron P

10-23-2003 12:22 PM

Actually, that would be considered a Jack Shaft Guard.

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