50hp powerhead swap?

P

phatmanmike

Captain
Joined
Oct 24, 2003
Messages
3,869
i have a 1972 50hp evinrude bad lower unit<br />friend has a 1980 50hp evinrude with a frozen powerhead, but all else is good.<br /><br />can i take the 72 powerhead and put it on the 1980 midsection?
 
OBJ

OBJ

Supreme Mariner
Joined
Dec 27, 2002
Messages
10,161
Re: 50hp powerhead swap?

Mikey.....bolt pattern should be the same. Just make sure the driveshaft splines are the same and you can get the manual shift components to bolt up to the 72 powerhead. Hard to tell just from the parts breakdown.
 
D

Dhadley

Supreme Mariner
Joined
Feb 4, 2001
Messages
16,978
Re: 50hp powerhead swap?

There is one thing you will run into. The base of the early powerhead has a "jog" in it on one side. The late model block is straight on both sides. You will need to do some welding to give the base gasket something to seal on. Without it exhaust will get under the cowling and the motor wont run right.<br /><br />We've made the swap with a late block to an early mid section but never tried it early block to late mid section. Look at the bottom of the block you want to use and the adaptor plate from the 1980 motor. You'll see what has to be done.<br /><br />Good luck!
 
You must log in or register to reply here.
Top