1985 Evinrude 8 hp

[wildwood11]

I am working on an evinrude 8 hp. It has spark on both cyls, but does not start. It seems to backfire hard every 10 or so pulls. Is this most likely carb or could I have hooked the electrical up wrong? I am getting solid spark on both cyls.

Thanks

 

[nwcove]

Re: 1985 Evinrude 8 hp

try switching the plug wires from top to bottom.

 

[wildwood11]

Re: 1985 Evinrude 8 hp

Which plug wires? The spark plug wires or the coil wires?

 

[nwcove]

Re: 1985 Evinrude 8 hp

switch at the plugs. just to make sure the backfiring isnt due to reversed plug wires.

 

[wildwood11]

Re: 1985 Evinrude 8 hp

I dont think that is the case but I will try.

 

[Haffiman]

Re: 1985 Evinrude 8 hp

Check if the plugs are both sparking at the same time. If so, change the powerpack.

 

[wildwood11]

Re: 1985 Evinrude 8 hp

The top plug wire goes from the top plug to the top coil and the bottom plug wire goes from the bottom plug to the bottom coil. I checked the spark timing as was suggested and the plugs are firing opposite of each other. I am going to try new plugs today.

 

[Davem3]

Re: 1985 Evinrude 8 hp

use champion spark plugs only

 

[Haffiman]

Re: 1985 Evinrude 8 hp

Have you checked the flywheel key? You may have spark at the wrong time. If access to a timing light, do a test or lift off the flywheel and check the key.

 

[wildwood11]

Re: 1985 Evinrude 8 hp

I have never used a timing light and dont think I have one. What should I be looking for?

 

[Haffiman]

Re: 1985 Evinrude 8 hp

You should be looking for spark close to TDC at idle. But if no light available, lift off the flywheel. (You need a flywheel puller!)