Does this sound like a timing issue

[Surgeevg22]

Hi everyone,

I just wanted to ask you guys for some quick help. I had my Four Winns fling in storage for 5 years. i recently rebuilt the carbs and installed new hoses. she started right up but i believe the timing is off on the Johnson/Evinrude 115 engine.

I believe the timing is off because last time i used it the timing cam roller fell out and we poped it back in, But not before we messed with one of the screws since we thought it was an idle setting.

well we stated the boat up today and she idles fine but the engine surges and shakes at higher rpms.

I attached a video just so you can hear what she sounds like at low and high rpms.

If it isn't a timing issue then does anyone have an idea of what could be causing this?

Thanks in advance,

 

[Surgeevg22]

Re: Does this sound like a timing issue

Anyone have any ideas?

Much appreciated.

 

[Dangerousdave2]

Re: Does this sound like a timing issue

Ok. "the timing cam fell out and we popped it back in" is not normal!
Can you expand on this.
Secondly, how does it perform under load? Revving the engine with no load will alter the timing as the engine will run on and it can cause serious damage.

 

[Grub54891]

Re: Does this sound like a timing issue

I saw no outboard, what am I missing? And no water? Someone is messing with me?

 

[Surgeevg22]

Re: Does this sound like a timing issue

Sorry for replying late. What i ment by the timing cam is actually the metal rod with the plastic roller tip that adjusts the timing as the engine accelerates. The roller fell out of the timing base just under the fly wheel. It keeps poping out. I have just ordered a new set to fix this.

The boat was sitting for 5 years but last time it was on the water it was sputtering at mid throttle. Iddle and wot was smooth. I have yet to take it out this year. I just got done with rebuilding the carbs and replacing all fuel lines.

Ill add pictures as soon as i get home to clear things up.

Grub. The boat is run by a Johnson 115 outboard engine set up as an inboard it runs a jet pump for propulsion.
Its an uncommon setup that was only done a few years i believe.

Thanks for the help so far.

 

[Surgeevg22]

Re: Does this sound like a timing issue

This is what i mean when i say the cam roller fell out.

IS the second screw with the arrow the idle?



It seems to me like there is a large gap in this timing piece. is that normal or is something missing/ worn too much.



Lastly i found this while taking these pictures. I haven't tried running it in low light to see if it was arcing. That cut on the insulation is from the spark plug wire rubbing against one of the coils. Any thoughts?



thanks.

 

[Surgeevg22]

Re: Does this sound like a timing issue

Any ideas?

 

[Surgeevg22]

Re: Does this sound like a timing issue

Btt

 

[Dangerousdave2]

Re: Does this sound like a timing issue

Ok. Check in the manual re the timing link. Replace / repair.
Replace the plug leads that are cracked.
You know these things are possible causes of any problems so eliminate them first.
Then run the engine under load and note the max revs and speed you achieve. Do the revs drop off at WOT?
Without good info, good replies are impossible.
Again, revving any engine without any load is asking for problems.

 

[Dangerousdave2]

Re: Does this sound like a timing issue

Ok. Replace or repair the timing arm. Look on the forum for the link to the owners manual. Replace any cracked plug leads. No one can help if you don't fix the things that you know to be faulty.
Then run the engine under load. How does it perform? What are the max revs and speed? Note the revs at 1/4, 1/2, 3/4 and full throttle and the speed achieved at full throttle. With this info someone here will be able to advise if there is a problem.
Again, asking for a solution when there are things you know to be wrong with the engine is only going to confuse the issue.

 

[seahorse5]

Re: Does this sound like a timing issue

This is what i mean when i say the cam roller fell out.

IS the second screw with the arrow the idle?

View attachment 159753

It seems to me like there is a large gap in this timing piece. is that normal or is something missing/ worn too much.

View attachment 159754

Lastly i found this while taking these pictures. I haven't tried running it in low light to see if it was arcing. That cut on the insulation is from the spark plug wire rubbing against one of the coils. Any thoughts?

View attachment 159752

thanks.

Get that roller replaced. What was the reason the steel timing link came off? Is the plastic ball joint worn or broken? Often that happens if the timing base is stiff from lack of lubrication. Does it move freely? The long screw is the idle speed adjustment. Get the stuff you see wrong fixed right away so you can get back on the water and enjoy the remaining weeks of summer.

 

[Surgeevg22]

Re: Does this sound like a timing issue

Thanks for the reply.
The steel timing link came off due to wear on the plastic ball joint.
The timing base has plenty of lube and it does move freely. For the time being i rolled lots of electrical tape on the spark plug wire and started her up on the hose. She sounded a lot better but i wont know anything for sure until i put her in the water.

Maybe Sunday.