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SHAFT MEASUREMENT

Use a level. Place it on the pad and let it extend out past the prop shaft. Adjust your trim so shaft is parallel with the level. Measure from top of level to center of prop hsaft.


Jim
 
Or does he mean how to measure a motor to determine whether it's a 20" or a 25"?
 
dunno, i can tell by looking. the extra long shaft always looks out of place that's how i tell.
 
oops!!! Sorry about the confusion. I may be wrong but, I believe when they list shaft lenght it is actually transom height. 15, 20, 25 etc. As far as measuring shaft length I generally go by looks. I have found that if you have the lower unit off and measure from the top of the water pump housing to the bottom of the splines is approximately the shaft lenght stated for the motor.

I'm not sure that all made since. I'll just blame it on being late. Good night!

Jim
 
I can't help, since I never did find out where to measure to/from. I just go by looks too.....................:(
 
Motor Shaft Length"

Here's the "old" school way to do it. Measure from the top of where the swivel/clamp bracket just rests on the transom to the top of cavitation/anti-ventilation plate. Some engines there are a small set of two or three plates but typically you measure down to the main one. That should give you your 15, 20, or 25" dimension. ( sometimes 16,21, and 26) But actually what was said first is usually the case. After awhile you can just look at an engine and just tell.
 
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