Shaft length on 67 40hp Rude

[Birdup]

What is the shaft length of a short shaft 1967 40hp Evinrude model #40752E is it 18" or is it 15"? I have read that both are considered variations of a short shaft. Is this true for this year?<br /><br />Thanks

 

[R.Johnson]

Re: Shaft length on 67 40hp Rude

A short shaft is 15"

 

[rolmops]

Re: Shaft length on 67 40hp Rude

There is a bit of doubt there.<br />The older johnnyrudes have 2 cavitation plates(or if you like that better ventilation plates)The top one sits at 15 inches while the bottom one is 18 inches.<br />The long shaft is 5 inches longer on both,that makes it 20 and 23 inches.You have to find the right spot on the transom to attach them.With a deep V all the way down and with a flat bottom as high up as you can get it.

 

[lark2004]

Re: Shaft length on 67 40hp Rude

The real cavitation plate, the one that is directly above the prop, is 18" from the clamps.<br /><br />The bulge that many people mistakenly call a cavitation plate, 15" from the clamps, is where the lower unit bolts up to the leg, and houses the waterpump