85 hp Johnson has spark wont fire ?

merlin8676

Recruit
Joined
Jul 2, 2010
Messages
5
1977 85 hp Johnson, Ive been working on , changed the power pack, thermostat and now this issue. Got it started fine, then after 10 min abruptly stopped.

Now wont fire up at all. maybe a pop if Iam lucky, Have great spark on each of the 4 plugs. Spray start fluid and still NO indication at all , What happened, ran fine , reved up fine and now nothing at all.

Can anyone advise ( checked the fuse and its ok )
Mark
 

scrampbell

Petty Officer 2nd Class
Joined
Feb 25, 2009
Messages
108
Re: 85 hp Johnson has spark wont fire ?

If you've got good spark then you've got to check the fuel supply next.

1. make sure you've got gas in the tank.
2. test your fuel pump.... remove fuel line between fuel pump and carbs and crank engine. fuel should pulse out in squirts from the fuel pump. (obviously, catch the squirting fuel in something.)
 

Daviet

Fleet Admiral
Joined
Sep 24, 2008
Messages
8,958
Re: 85 hp Johnson has spark wont fire ?

Did you have the flywheel off to check any electrical componets?
 
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