1977 evenrude 85 hp ignition problem

[85rude]

I have a 1977 85 hp evinrude outboard engine.Model # 85799S Ser# Jooo4824. The problem I am having is, engine stops running after 15 min.or so. After it sits and cools of for about 20-30 min it will restart and run good.I have no fire to all four plugs. I have replaced all four coils which didn't take care of the problem. I did the resistance test on the sensor coil and charge coil as per manual. As per manual, sensor coil is 6.5-10.5 ohms at room temp.(70F). My reading is 11.5 ohms at about 92 F( IS THIS OK?)<br />My charge coil reading is 638 ohms which is in spec's as per manual. Can a bad power pack cause this problem? <br />any info be great

 

[a.d.mobile]

Re: 1977 evenrude 85 hp ignition problem

my 78 just did this pwr pack was at fault.

 

[85rude]

Re: 1977 evenrude 85 hp ignition problem

Guess I will try a power pack. I will find the bad part sooner or later. Replacing all ignition part is still cheaper than a repair shop.

 

[Jeff85evenrude]

Hi I'm new on here so here I got 1977 85 hp evenrude no spark I put new coils on and still not spark I thinking on testing the power pack but not quite sure how to and if it's not the power pack what's the next step I should take. Thank u any info is helpful

 

[racerone]

Hard to have 4 bad coils.---Take black / yellow stripe wire off the pack and check for spark.------Charge the battery and have battery load tested.----Take starter apart for inspection and ohm check on armature.-----No $$$ spent to do that.----You test charge coils and sensor coils .----They are under the flywheel.---No need to remove flywheel to test them----No easy test can be done on powerpack.

 

[tpenfield]

@Jeff85evenrude Welcome to iBoats. Please review the forum rules, particularly about posting to old threads.

Closed.