How to find shaft length

[jon10]

Im looking to buy a motor on ebay ,but I need to know my shaft length. I have A merc 150 1994.Can anyone help!:

 

[bgbass.1]

Re: How to find shaft length

just measure the leg on the engine you have now.

 

[1730V]

Re: How to find shaft length

Measure from the center line of the prop to the top of the mounting bracket.

It's either 20" or 25".

 

[Chris1956]

Re: How to find shaft length

Jon, Don't you really want to measure the height of your boat's transom? A 20" transom is standard for a 20" motor shaft (longshaft), a 25" transom is standard for a 25" motor (X-Long shaft).

The lower units are interchangable, such that if you need a longshaft, you can put a 20" lower on a motor that had a 25" lower.