No top cyl power. Carb or Ign?

[drackley]

Just overhauled Evinrude 115 v4 1994. The carbs were done also. When running (poorly) I can remove the plug wires from the top cylinders and there is little defference in the rpm. Removing the bottom wires will kill lt. I have very good compression. Removing the plugs shows they are ALL very wet. A check of the spark with the plug attached to the wire shows a good spark. Should I proceed with an ignition issue, or a carb issue?

 

[Mod2]

Re: No top cyl power. Carb or Ign?

Moving to Johnson/Evinrude forum.

 

[drackley]

Re: No top cyl power. Carb or Ign?

Thanks.

 

[zj-jeepster]

Re: No top cyl power. Carb or Ign?

drackley,<br />you see good spark for all cylinders?

 

[DJ]

Re: No top cyl power. Carb or Ign?

drackley,<br /><br />If the compression, spark and fuel all seem to be there, that's a tough one.<br /><br />Did you do the overhaul? If so, did you replace all the crankcase seals?

 

[drackley]

Re: No top cyl power. Carb or Ign?

Compression, spark, and seals are very good. I've additionally found that the new plugs are VERY wet and oily and running on the hose for a few minutes results in a good sized puddle of oil in the driveway. I'm assuming this would indicate a very rich condition and the oil cant get burned off. The tank was drained and 50-1 added so the fuel is not over oiled. The carbs were removed and gone through again before this due to the choke circuit on one being plugged. This is an inboard turbo jet, and has the electric primer circuit. Could the valve in that have opened?