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20" or 25" shaft?


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Alright, it's not what you're thinking...........

How do you determine which shaft length is correct for your boat? I've got a 1999 Angler single engine cat that I'm thinking of repowering. I brought it to a local dealer who said the 99 Yammie 115 I have on it now is a 25" shaft and he thinks it should be a 20". Since I don't have the original manual on this boat and Angler is ABSOLUTELY NO HELP AND NEVER RESPONDS TO ANY PHONE CALLS OR EMAILS I don't know where to find the answer.

Do cats need the longer shaft outboard?

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Alright, it's not what you're thinking...........

How do you determine which shaft length is correct for your boat? I've got a 1999 Angler single engine cat that I'm thinking of repowering. I brought it to a local dealer who said the 99 Yammie 115 I have on it now is a 25" shaft and he thinks it should be a 20". Since I don't have the original manual on this boat and Angler is ABSOLUTELY NO HELP AND NEVER RESPONDS TO ANY PHONE CALLS OR EMAILS I don't know where to find the answer.

Do cats need the longer shaft outboard?

Its a little harder on a cat.

But the real test is to go run your boat and see where the anti ventilation plate is at cruise.

Get up to a fast cruise speed, trim it however you normally do and go take a look.

If the plate is visible at the surface, thats good. if its under the surface of the water, try to figure out how much.

5 inches is HUGE. so unless your motor is absolutely buried and spraying water all over the cowling and everything else, I'd say stay with a 25 inch shaft.

If the plate is just below the surface of the water ( an inch or two) then you can adjust that with the mounting holes of the motor.

Let us know what it looks like next time you run it.

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