evinrude 115hp starting and runing problems

[matthew1]

My outboard 1985 evinrude 115 starts up great 90% of the time. 10% of the time it takes 3-10min of motoring to get it started. Runs great 90% of the time 10% of the time it acts like its running rich, bogging down then it will just run like a top any body have any helpful info

Thanks Matthew

 

[ezeke]

Re: evinrude 115hp starting and runing problems

Many times that is caused by water in the fuel. Do you have water separating fuel filter installed?

 

[SparkieBoat]

Re: evinrude 115hp starting and runing problems

I agree sounds like bad fuel, or possibly a coil/power pack going in and out. I recommend making sure water is not getting into fuel and then new Champion plugs, also check plug wires, those cowls are know to hook the plug/coil wires, crappy design if you ask me, have to be so careful when installing the cowl on OMC V-4s

 

[matthew1]

Re: evinrude 115hp starting and runing problems

I will look again but I quite certin there is no water I was leaning to an electrical problem Thanks

 

[matthew1]

Re: evinrude 115hp starting and runing problems

Is there a positive way to check the coil packs

 

[LukeBRoberson]

Re: evinrude 115hp starting and runing problems

Is there a positive way to check the coil packs

it's coils, and power packs, not coil packs.

No real good way to check power pack that I know of (just replaced my power pack myself). There are plenty of articles online here to check if coils are good just do a quick search.

If the power pack goes out and your coils are old, you might as well change the coils too because theyll probably go out soon as well.

 

[emdsapmgr]

Re: evinrude 115hp starting and runing problems

When the engine starts to run badly, the ignition system could be dropping a cylinder. If you have an inductive timing light handy at that exact time, put it on each of the 4 plug wires and look at the flashes from the light. You will be able to see weak spark and misfires. That engine has two power packs, one for each head. You can swap them to further verify spark capability and they can be replaced individually.

 

[SparkieBoat]

Re: evinrude 115hp starting and runing problems

go here ,,a very good trouble shooting guide, you will need a DVA adapter and a multi meter, google dva adapter..should be about $35 plus shipping..also get a spark gap tester from an auto parts store
http://www.cdielectronics.com/downloads/troubleshooting guide/

 

[matthew1]

Re: evinrude 115hp starting and runing problems

Thanks a lot for the trouble tree I can work with that and thanks everyone else for the help

 

[matthew1]

Re: evinrude 115hp starting and runing problems

Luke sorry for the wrong term I have not worked on to many boat motors I am a Master Technician for a S76C+ helicopter