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  20" vs 25" engine shaft length

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Author Topic:   20" vs 25" engine shaft length
Mark Gallagher posted 02-19-2002 08:39 AM ET (US)   Profile for Mark Gallagher   Send Email to Mark Gallagher  
At what points do you measure to determine engine shaft length?


JBCornwell posted 02-19-2002 09:31 AM ET (US)     Profile for JBCornwell  Send Email to JBCornwell     
Howdy, Mark.

Measure from the part of the mount that fits the top of the transom to the anticavitation plate.

Most engines have a code in the model # that gives shaft length. L for Long (20) and X for Xtra-Long (25).

Red sky at night. . .
JB :)

ECUSeaPA posted 02-19-2002 01:40 PM ET (US)     Profile for ECUSeaPA  Send Email to ECUSeaPA     
What shaft length would a 22 OR with twins have??
JFM posted 02-19-2002 01:43 PM ET (US)     Profile for JFM  Send Email to JFM     
peteinsf posted 02-19-2002 01:51 PM ET (US)     Profile for peteinsf    
What year 21'?
peteinsf posted 02-19-2002 01:53 PM ET (US)     Profile for peteinsf    
Sorry, lost my mind there...

Classic 22 hull takes a single 25" or two 20"s


Tom W Clark posted 02-19-2002 02:31 PM ET (US)     Profile for Tom W Clark  Send Email to Tom W Clark     
Just to clarify, JB is correct about measuring shaft length. It is not precise to the fraction of an inch, but more or less.

A 22' will take a single 25" shaft motor BUT 20" shaft for twins.

In the "old days" there was regular shaft (15") and long shaft (20"). Then they came out with the extra long shaft (25") in the late 1970's. Now we often here short shaft meaning 15" and sometimes regular meaning 20". It gets confusing and is MUCH better to simply refer to shaft length in inches. We now have shaft lengths of 15", 20", 25" and 30" with abbreviations of R, L, XL, XXL. Just use the numbers.

ECUSeaPA posted 02-19-2002 08:45 PM ET (US)     Profile for ECUSeaPA  Send Email to ECUSeaPA     
The 22' OR with Twins is a 87, twin 115's.

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