1982 Evinrude 90 bogging down....PLEASE HELP!!!

ejbohan

Recruit
Joined
Sep 7, 2011
Messages
3
Thanks in advance to all that respond. I am new to posting but not new to viewing this awesome sight!!! Here's my issue... I just purchased a Whaler w/a 1982 90 hp Evinrude that ran fine for two trips then did not want to get up on plane (bogged down and skipped). I rebuilt the carbs and changed out the fuel lines. Still no luck. I checked the compression and all was even +/- 5 across all four (118). The port side bank spark plugs are extremely clean(wipe w/rag and they look new) as opposed to the starboard side which have acceptabnle oil/carbon deposits. I found that the port side power pack was not working as I had swapped starboard for port and the port was fine after swap. I cleaned the ground on the bad side and it seemed to work ok. I also noticed a lot of gray crud coming from the hub of the prop (unburned fuel/oil?) The seals for the gear oil are ok. I also had run a can of startron through several days ago to de-carbonize the engine. I had found that the port side head gasket was weeping water on the block so I replaced the gasket. (All looked good in the cylinder and piston when apart with the exception of it having a bit of carbon build up). I just picked up a new power pack and a spark tester to check the coils. I hope I am on the right track. If anyone out there thinks I should be doing something different please chime in. Once again, thank you for all input and I appreciate all feed back.

ejb
 

emdsapmgr

Supreme Mariner
Joined
Dec 9, 2005
Messages
11,551
Re: 1982 Evinrude 90 bogging down....PLEASE HELP!!!

The pack swap is a good test technique. Sounds like a new power pack was needed. When you get it installed, run the engine up to normal operating temps. Then check for spark on all plug wires with an inductive timing light while it is running. You can visually see what is going on by the flashes from the gun. These flashes will show if you still have intermittent or no spark issues.
 

ejbohan

Recruit
Joined
Sep 7, 2011
Messages
3
Re: 1982 Evinrude 90 bogging down....PLEASE HELP!!!

Thanks for the info. I purchased a spark tester and found that the lower port cylinder had no spark and then the upper port acted up. I ended up purchasing a coil and a power pack. In the driveway all is working fine. I will take it out today to run it under load. Thanks again!!


ejb
 
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