Still have a problem.

[maverick974]

A couple of weeks ago I asked a question about my engine. 1984 Force. 85 hp.
My engine would start but wouldn't run well. It was not firing on two cylinders but after about two minutes, it would warm up and suddenly it would run fine. Perfect. It was like someone flipped a switch.
I thought I nailed it down to the CD module. I was getting no spark on the bottom cylinder.
I have two modules. One that fires the top two cylinders and the other which fires the bottom cylinder.
I was getting no spark to the top two cylinders and when I switched the modules, I then got no spark to the bottom cylinder so I assumed that the CD module was bad. I bought another one and I have the same problem.
I guess I didn't diagnose it correctly.
I'm at a loss now. What else could it be? It's got to be electrical otherwise it would do it all the time but it only misses until it warms up for a few minutes but until then, it doesn't fire one cylinder at all.
I ruled out the coils because it would change when I switched around the CD modules.
Stator maybe?
Any ideas????

 

[pnwboat]

Re: Still have a problem.

I would suspect the stator, but I'd first rule out bad connections especially the ground wires.

Very easy to ohm out the stator. You should have two sets of Blue and Yellow wires from the stator. One set provides stator voltage to the CD module that drives #1 and #2 coils. The other Blue and Yellow wires supply voltage to the CD module that drives #3 coil. You should read between 680 and 850 ohms between the Blue and Yellow wires that supply voltage to the CD modules. Remember to disconnect one of the wires (either Blue Or Yellow) from the terminal block when measuring resistance to eliminate any other circuitry affecting your readings.

Each coil has a ground wire that is attached to the coil mounting plate. The coil ground wire is usually on the back side of the plate, so it's hard to see. Also there should be a ground wire that goes between the coil mounting plate and the engine block. Make sure your grounds are clean and making good contact.

 

[jerryjerry05]

Re: Still have a problem.

Your motor,could be a stator or the trigger.
outboard ignition .com has test procedures.
To test the trigger,you will probably need a peak reading volt meter.
Your parts come with quick disconects.So if you find the parts,make sure they are the right year.
The newer comes with screw down connectors.

 

[maverick974]

Re: Still have a problem.

Well, I've checked out the wires, connections, etc. and it all looks good to me. I am going to start testing the units tomorrow but meanwhile, can you folks help me out with the part numbers? I've been looking online and I am pretty sure I have the specific P/N's for my engine but I can't find what other P/N's would work for my engine.
1984 Force 85 hp
Model # 856X84L
S/N 2937
It looks like the stator is P/N F616095 and the trigger is P/N 136-0629-3 (replaces 819017, F616029 and 300-888795.\
I have seen a few websites that say all Prestolite stators and triggers between1984 and 1989, from 70 hp to 125 hp will work. I tried looking part numbers for different engine and they have part numbers very similiar.
I'll be looking for a part or parts on Ebay so I'd like to know what to look for.
Are the parts for my engine that specific or can I look at other years and hp's??????
Any help would be greatly appreciated.

Thanks again

 

[jerryjerry05]

Re: Still have a problem.

85hp ONLY!! 125's different part#s.
Stator 84/85/86 Same with the trigger.
1986 N model can use the newer stuff.
The stator from 1986- 1989 won't fit.
Gotta compare the #s
85 and 125 Trigger are different.
One has 3 wires and the other has 4