Can fouled plugs do this ?

[78whiteorbs]

Got a 69' 33 HP Johnny electric and It ran great ...... now it will not run.
I replaced a sheared woodriff key recently and that is it. I pulled the plug wires and got hot spark . Checked the fuel lines and sprayed myself in the face with gas! NICE! Not really so the only thing I can think of at work today was the the plugs fouled out . I didn't ahave a socket with me to check . But it was not back firing or anything ,just turning over and over just like when I had sheared the woodriff key. I checked the key though and it isn't sheared????

Can severely fouled plugs do this >???

 

[Rick.]

Re: Can fouled plugs do this ?

For sure if they are fouled. It has never started since changing the key? Are you certain you got the flywheel all the way down on the key? Did you torque the nut? Rick.

 

[78whiteorbs]

Re: Can fouled plugs do this ?

Yes , it ran fine after I reinstalled the key. I didn't have a torque wrench so I just tried to get it really tight. I know ,I know ..... but it ran great afterwards.

Update: pulled the plugs today and the top one looked great but the bottom one was black and oily. Wiped it off and reinstalled. Now it will backfire wildly .
about to pull some hair out here. seems the timing is off or I am not sure. It ran great last time out barely turn the key and ignition! now just a loud bang , but not even trying to crank up.

 

[Rick.]

Re: Can fouled plugs do this ?

Is there any chance you crossed the plug wires? Put the wrong wire on the wrong plug. Rick.

 

[kenmyfam]

Re: Can fouled plugs do this ?

Is there any chance you crossed the plug wires? Put the wrong wire on the wrong plug. Rick.

Good thought.

 

[78whiteorbs]

Re: Can fouled plugs do this ?

I tried switching the wires and nothing ,thanks though. Man this is frustrating...
How far is the flywheel suppose to go down though?Is the top of the key suppose to be flush with the top of the flywheel taper ? There isn't but so much clearance between the plug wires underneath and the bottom of the flywheel so I think I am in the ball park. What's causing the oil on the bottom plug though>
when I first got the engine one of the bottom slotted carb bolts that bolt it to the motor was missing leaving the motor sucking air pretty bad there. I replaced another in its place and upon inspecting it today it was finger tight and there was fuel around it .this would also be the bottom cylinder that is having all the oil on the plug .

 

[Chris1956]

Re: Can fouled plugs do this ?

I still think your timing is off. Perhaps the key sheared again. I would pull the plugs and use a screwdriver to determing TDC for each sylinder. Now spin the flywheel by hand and see if the plug fires at or just before TDC. is the plate under the flywheel the coils mount onto rigid, or does it flop all over?

 

[78whiteorbs]

Re: Can fouled plugs do this ?

Chris , it is rigid. I will make some photographs and post tonight. The key that I replaced the old sheared one with was one I got at Napa and had to grind down. I read some posts that said this was ok and sopme that said you had to use a OMC one as the others where to "soft" . I suspect it is the timing as well. It is backfiring and before i was fiddling with my pull start, it was running great last week. I originally sheared the key after attempting to pullstart it quite abit. I thought it was because the flywheel was not torqued down but I am wondering if the pawls were improperly aligned might have caused a bind or stress to the key now .

"use a screwdriver to determing TDC for each sylinder. Now spin the flywheel by hand and see if the plug fires at or just before TDC."

I get the idea of checking the timing this way although what does TDC stand for and where should the plug fire at . When the pistion is all the way in is what I would guess (I am an amatuer still learning). Thanks

 

[wilde1j]

Re: Can fouled plugs do this ?

Backfiring suggests another sheared key. I would replace with the correct BRP key, make sure the mating tapers are clean and dry, and THIS time torque the flywheel nut to the correct value. If you allow this to repeat, the crank taper may become scored and damaged, requiring a new crank and perhaps flywheel to correct. Your choice, though.

 

[78whiteorbs]

Re: Can fouled plugs do this ?

The key isn't sheared but I'd love to replace it with the right one , anyone know where a man can find one? I will definately torque it down next time properly. The shaft is fine but the flywheel was scored a little from the first time the key broke , doesn't look bad though .

 

[wilde1j]

Re: Can fouled plugs do this ?

Try any BPR dealer.

 

[78whiteorbs]

Re: Can fouled plugs do this ?

Googled it and found nothing. What does BPR stand for ?

 

[78whiteorbs]

Re: Can fouled plugs do this ?

OK, I found it .