Used crankshaft

[nabeel.alsalam]

My 1991 Johnson 40 hp was clacking. I took it apart and found that the rod journal on the #1 piston is discolored and very very rough. <br /><br />I guess I can get it repaired but thought I'd look for a used one also. I see one one ebay from a 1971 Johnson 50 hp. Any chance that is the same crank as in my engine? Anybody know?

 

[Joe Reeves]

Re: Used crankshaft

Nabeel.... I have no idea of the "complete" interchange, however I do know that the 1971 50hp crankshaft is a completely different item and will not fit your 1991 40hp Johnson.<br /><br />The interchange that I am aware of (retired, books only go to 1992) is as follows:<br /><br />Crankshaft 334203 fits from 1984 to 1992 (last year in my book). This applies to the following HP engines: 25/35/40/45/50/55/60hp in the above years.<br /><br />Your crankshaft part number is 334203 and lists for about $800.00 US. Hopefully you can find one somewhere in your area. I do have one left in my remaining stock but check first on this site for whatever you need.<br /><br />You'll probably need to replace that connecting rod also. No doubt (I suspect) the problem was caused by a fouled carburetor.

 

[nabeel.alsalam]

Re: Used crankshaft

Thanks, Joe. <br /><br />Yes, I was having idling and fuel starvation problems leading up to the clacking. I guess it took me too long to sort out those problems and the damage resulted.