1978 Johnson 70 hp Cranking Issue

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Chokndog

Cadet
Joined
Nov 10, 2006
Messages
7
I have a '78 model Johnson 70 hp. It has setp for about 2 years. The starter will engage the flywheel and the flywheel will turn a little bit, then stop. The starter gear stays engaged, but the starter shaft keeps spinning. I have to disengage the starter gear by hand and retry. I removed the plugs and sparayed some Marvel mystery oil inside. With the plugs removed, the flywheel turns easy, but with plugs in, there is much more resistance. need help. Thanks.
 
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steelespike

Supreme Mariner
Joined
Apr 26, 2002
Messages
19,069
Re: 1978 Johnson 70 hp Cranking Issue

Sounds like you need a new bendix they probably have them here at iboats.Otherwise a starter repair shop, NAPA or E/J dealer.If there is an excesive amount of oil it may not be able to crank over.
 
C

Chokndog

Cadet
Joined
Nov 10, 2006
Messages
7
Re: 1978 Johnson 70 hp Cranking Issue

Thanks guys. I will try that and see if it helps.
 
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imported_airxsteel

Seaman
Joined
Oct 25, 2006
Messages
69
Re: 1978 Johnson 70 hp Cranking Issue

I had a very similar thing happen to me on a 79' Johnson 140 HP. The starter had to be replaced, once I did that it was good to go.

Good luck. By the way, the starters are not cheap on those. I was looking at 220 for a new one. OUCH!!

I got mine on eBay for about 70 rebuilt.
 
C

Chokndog

Cadet
Joined
Nov 10, 2006
Messages
7
Re: 1978 Johnson 70 hp Cranking Issue

I put the new one on and it works great. Engine started right up after 2 years sitting. Thanks.
 
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