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Author Topic:   1981 Evinrude 200-HP Bogs When Under Load
Chilkat posted 09-10-2015 07:00 PM ET (US)   Profile for Chilkat   Send Email to Chilkat  
My [1981 Evinrude 200-HP outboard engine] will not [accelerate to] over 1,500-RPM under load. It revs over 3,000-RPM in neutral, but in gear it bogs down once I try to accelerate. I have replaced the fuel filter, fuel lines and cleaned the screen filters, but I have not rebuilt the carburetors. In the past, [the 1981 Evinrude 200-HP] would bog down with throttle for a few minutes then all of sudden roar to life and go fast. Now it is stuck in bog-down mode and won’t accelerate anymore.
NewportMe posted 09-11-2015 07:25 AM ET (US)     Profile for NewportMe  Send Email to NewportMe     
I would check for spark with an inline spark tester. Sounds to me like your motor could be missing spark on one or more cylinder.


tedious posted 09-11-2015 08:33 AM ET (US)     Profile for tedious  Send Email to tedious     
1) Check for good spark on all cylinders
2) Perform a link and sync using the factory service manual (not an aftermarket manual)
3) Clean and rebuild the carbs

From your detailed description, I'd bet you have an ignition problem - something that was intermittent previously and has finally given up the ghost.

Chilkat posted 09-11-2015 05:38 PM ET (US)     Profile for Chilkat  Send Email to Chilkat     
Thanks for the help, I will acquire an inline spark tester, and I have the FSM, so will look for a link & sync, although I have never heard of that.
dfmcintyre posted 09-11-2015 07:56 PM ET (US)     Profile for dfmcintyre  Send Email to dfmcintyre     
Before spending much more time and money on a 34 year old engine, perform a compression check.

Regards - Don

seahorse posted 09-12-2015 08:27 AM ET (US)     Profile for seahorse    

Make sure that the timer base - spark advance plate - rotates smoothly along with the throttle lever as the motor accelerates. This is assuming that carbs, compression, etc. are all in good shape.

Chilkat posted 09-20-2015 08:37 PM ET (US)     Profile for Chilkat  Send Email to Chilkat     
Checked the compression and that is good (whew!)

The problem seems to be in the ignition. After trying the resistance tests in the FSM, looks like I may have two bad ignition coil packs (to spark plugs) and a bad sensor coil/timer coil (beneath the flywheel). If the sensor coil was bad, wouldn't the engine not run at all?

Also, when trying to start the motor, the small gear on the starter keeps retracting so the flywheel wont turn. Dopes this mean a bad solenoid? It doesn't retract every time I turn the key, but it does it about 50% of the time I try to start the motor.

Also, the voltmeter on the dash always reads 12 volts when the boat is running, so it does not seem like its charging the batteries. If I have to pull the flywheel to change the sensor coil, guess the stator should be change too.

tedious posted 09-21-2015 07:59 AM ET (US)     Profile for tedious  Send Email to tedious     
Chilkat, it's very unusual to have a whole bunch of different problems crop up all at the same time - I mean, what are the odds that you have the 5 separate problems you describe, all coming at you out of the blue?

At least some of problems would be happening simply due to low battery voltage - was the battery fully charged before you ran the tests? You might want to double check things with a known good battery, or even with a set of jumper cables on there, from a running car.


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