Accidental kill switch now missing

[Timc9516]

Well before i start telling the back story. Let me provide some info. This is my soon to be father inlaws boat its a 1986 bayliner fish and ski with a 1986 force 125 outboard. (Model a) he had it completely restored after sitting for 15ish years the motor had very low hours they are thinking somewhere around 10 . Well after a very long battle with things coming up and random issues with the motor we took it out for the first time the other day. We were out for about an hour putting it through paces seeing how it would run. It was fantastic motor was running great smooth as could be so we opened it up. Shortly after we gotta little high and came down hard. The killswitch was pulled by a baddly placed purse when we came down. Well after a minute or 2 of trying figure out what was going on we put tge killswitch back on and it fired right up but there was what felt like a very random but constant miss fire. If we keep it in high idle it will stay running but have that miss but once we brought it down to low idle to go in gear so we could get back to the launch it will die. Well after about 10 min of trying the batteries were getting low so we played it say and switch to a trolling motor. And spent an hour making our way back.

We got the boat home and it was off and on raining so we waited till the next day to put muffs on it and see what we could do.

We were able to get it flushed but didnt want to run it anylonger to prevent any damage.

So my question is what could be causing it to randomly miss like that. I put a inline spark tester on each cylinder and all 4 showed spark. It wasnt very bright but it was there(i know on cyl2 for sure.... had my finger alittle to close to the plastic housing of the tester lol). I also looked at all the magnets for the stator and they all look good. fuel was filled last year with correct ratio. I checked the screen in the pump and it was clean. Also the spark plugs are 2 years old and the motor has run maybe 4 times for 5 minutes ish each time before this.

Any idea on what could be the issue

 

[gm280]

@Timc9616 When you say the kill switch came out, are you talking about the lanyard part or the whole switch? If it was the whole switch, you could have pulled a wire and it is now either not connected properly or wire broken inside the insulation and being an intermittent circuit. If the boat really hit hard, you could even have a cracked plug that is causing an issue. So many thing to check and verify. Start with one thing and verify it is solid before moving to something else.

 

[Timc9516]

I probably should been more descriptive lol. Just the lanyard got pulled And its a brand new kill switch. I will try new spark plugs for sure i didnt think about it possibly cracking. I will report back tomorrow with what i find.

Also i took a ohm meter to the stator and i got 750 on the first one and 595 on the second one. Im working on getting a shop manual for the motor. But till then by anychance would you know if that is in spec

 

[Timc9516]

Quick question would this be the right service manual. Im not sure because of the two different models

https://www.themotorbookstore.com/f...LS4YqOb9qUEc3vbX77fC7pPzo4ntHE4RoCcYkQAvD_BwE

 

[jerryjerry05]

The Clymer, Seloc etc. are books designed to cover a BUNCH of different motors.
They don't contain the specifics you need to answer your questions.

Try eBay for the "factory" manual.

Until then you can use outboardignitiondotcom or CDI Ignition for troubleshooting your motor.

You said:

(Well after a minute or 2 of trying figure out what was going on we put the kill switch back on and it fired right up but there was what felt like a very random but constant miss fire.)

This could be a trigger wire broken under the shrinkwrap, very tiny wires, or your sucking air somewhere??
Trigger: pull each wire and see if it is loose, it can look good and be broken under the shrinkwrap???

Sucking air: can of starting fluid, start motor, spray the SF around the base of the intake and all along the side of the port covers and under the coils/packs and around the fuel pump.
Being as it set for so long the gaskets could have dried and gotten brittle and cracked or even fell out. If the spray makes any difference in the way it runs?? Then there's an air leak somewhere??
DON''T run it with an air leak.

Do a compression test.​

 

[Timc9516]

Good news. I started with the spark plugs it was 13 bucks for all 4 and it definitely feels better id say the miss is gone. However when it started it was really high at idle (just under 3000) i shut it down for a bit and started it back up and it was surging between 1000 and 2200. I then remembered that you guys said check for a air leak and i sprayed the starting fluid around the intake gaskets and it didnt make a difference so i dont think its a bad gasket.

Any ideas why it was such a high idle at first and now surging.

Also as for finding a service manual the only other manual i could find was this one. Any idea if this is what i need?

 

[jerryjerry05]

That's the factory book. YES!!

Running on the hose can make the rpm's fluctuate.

Try manually pushing the throttle back.
Might be as simple as an adjustment???

 

[Timc9516]

Im sorry it took so long to get back to you. So i went through all the ignition components and they all tested fine according to the manual. So tried running it off a remote fuel tank. And it cleaned up great except for at idle it would randomly feel like a miss and then die. So we drained the fuel tank. Changed the fuel filter. And took it out today before we store it. And put fresh gas in and oil. And it still wanted to die at idle. But i was able to idle it long enough to get it in gear and do multiple passes hoping it would clean up any crap in the motor. It was running fantastic untill we got back to the launch and tried to idle and it instantly missed and died

Any ideas what could be causing this. Carbs were rebuilt recently. i havent found a compression tester yet to test it

 

[puffitu]

Check fuel pump diaphragm; )

 

[Grub54891]

Or the carb float got bent or misadjusted when it slammed down hard.

 

[Nordin]

Bad or no idle, check the settings of the air fuel mixture screws.
They can be set to rich or to lean.
Set them 1 turn out from lightly seated.
Then fine tune them, as you have the factory manual then you have the description how to set them.
Also check the idle screw setting, should be 700-800 RPM in gear and in water.