72 Evinrude 18hp questions

classic putter · Oct 1, 2009

Just aquired a lightly used 1972 Evinrude 18hp motor. sheared the pin or key on the top of the drive shaft that spins the flywheel. How do I replace this key or pin? any input is much appreciated

Daviet · Oct 1, 2009

Re: 72 Evinrude 18hp questions

You have to remove the flywheel to replace the key. You will need to remove the recoil starter, if it has one. remove the flywheel nut, there will be 3 bolt holes around the crankshaft nut , you need a puller and bolts (grade 8 ). Install puller and thighten down puller and flywheel will come off.

Remove sheered key, check for crank or flywheel damage, install new key from dealer and torque flywheel to spec.

14ftgrumman · Oct 1, 2009

Re: 72 Evinrude 18hp questions

Make sure that you use torque wrench. 40 ft/lb, or you will be doing it again real soon. Don't ask how I know.

classic putter · Oct 1, 2009

Re: 72 Evinrude 18hp questions

I got the fly wheel off, how does the key come out? seems like it goes down futher into the shaft, do I need to remove anything else to get it out?

bktheking · Oct 1, 2009

Re: 72 Evinrude 18hp questions

It does, use a small punch and a hammer to tap it out, they are a half moon so start at the edge, use penetrating oil if need be, don't hammer the crap out of it or you will wreck the crank.

Daviet · Oct 1, 2009

Re: 72 Evinrude 18hp questions

If the key is sheared off even, take a small punch on on end of the key and tap it with a hammer, it should rock it out. Then you cane grab it with a pair of pliers.

bktheking · Oct 1, 2009

Re: 72 Evinrude 18hp questions

Daviet are you reading my mind, you have powers I must say.

samo_ott · Oct 1, 2009

Re: 72 Evinrude 18hp questions

Evinrude stopped making the 18hp in '71 so it's probably a '71...

Daviet · Oct 1, 2009

Re: 72 Evinrude 18hp questions

bktheking, I can only type with 1 finger so it just takes me longer to say something.

lindy46 · Oct 2, 2009

Re: 72 Evinrude 18hp questions

samo_ott said:
Evinrude stopped making the 18hp in '71 so it's probably a '71...

I have a 1972 18hp. I know they made them at least through 1973.

samo_ott · Oct 2, 2009

Re: 72 Evinrude 18hp questions

lindy46 said:
I have a 1972 18hp. I know they made them at least through 1973.

In this 1972 Evinrude promo flyer, there is no 18, only a 20 and a 25. I was basing my assumptions on this.

http://www.old-omc.de/e_1972/seite_22_23.jpg

lindy46 · Oct 2, 2009

Re: 72 Evinrude 18hp questions

Hmm - interesting. Maybe a European model was considered 20hp? Mine is definitely a Fastwin, but 18hp.

72 Evinrude 18hp questions

Recruit

Fleet Admiral

Chief Petty Officer

Recruit

Vice Admiral

Fleet Admiral

Vice Admiral

Vice Admiral

Fleet Admiral

Captain

Vice Admiral

Captain