Force missfire

BobList

Petty Officer 2nd Class
Joined
May 20, 2010
Messages
135
After playing with this thing over and over, I thought that yesterday, I had fixed my bogging and rough running problems. I had been playing with fuel bulbs, cleaning and adjusting carbs, etc., only to have the next time out on the water, she'd run great, then bog. Repeat this all day long. So yesterday, I got my head out of "fuel issues", and into spark. ( I melted a piston on this thing a week after I bought it.. debris from fuel tank starved me out, so fuel/air problems was on my mind). Anyway, while idling on the water, my hand brushed the wiring that goes to the bar that has about 20 wires on it, held by screws..smoothed right out!

OK, got ya now, sucka. I proceeded to find the loose screw on the wire labeled #3, tightened it up. Dang.. holeshots, top end, idles smoooooth. Life is good and fast on the water!

Yee haa. I went out today, she's missing, bogging.. same old same old. Got disgusted, went home, started reading missfire threads on here, getting skeered of laying out bucks for coils, cdi stuff, etc. Anyway, out of about 7,237 threads about missfires only one guy..just ONE guy posted what to look for that fixed my engine.

I went out a minute ago, and looked at those connectors again. The loose screw #3 wire?.. INSIDE the tiny shrink wrapped end at the connector where the #3 label is..was a wire broken, touching intermittantly.. ( more not than the other).. so.. I peeled it back, exposed some new wire, wrapped it around the screw.. and got ready to fire it on the muffs. But wait, there's more.. if it could happen to one wire, would the others be too "special" to be damaged?,, nope.. found wire labled #4 loose under the shrink wrap..sliding in and out of the connector. Did the same "repair" to that wire..... fired it up.. I now got full rpms, smooth idle, and all that. All it took was a little push/pull on the wire..if you feel ANY movement.. re-do that connector.

Moral?

K.I.S.S.

Unless there's a loud bang, flames, and a lotta smoke... it's probably a simple adjustment or repair. As an auto mechanic.. I see more loose/dirty ground issues than bad parts. Free fix, easy to eliminate.

Bob List

( Now a PROUD 125 Force Owner!)
 

pnwboat

Rear Admiral
Joined
Oct 8, 2007
Messages
4,251
Re: Force missfire

Yep, seen that problem on several motors including my own! Good catch.
 

kywings

Seaman
Joined
Apr 11, 2011
Messages
58
Re: Force missfire

Bob List, Any ideas about this being the same on a 75 force. I have seen this wire area similar to the one you mentioned. Boat is always hard to cold start but sometimes warms up and runs great and other times it misses, boggs etc. I'm pulling next week and was going to rebuild the fuel pump and already installed new plugs. No change. Any advice appreciated.
 

BobList

Petty Officer 2nd Class
Joined
May 20, 2010
Messages
135
Re: Force missfire

If your engine has the same type of place where the wires all attach in one "bar".... it could very well be the same type of problem. They are actually the wires that move when you advance throttle.. they came from the trigger wheel to the distribution panel to the CD boxes , which fire the coils. If you find them all in good shape, that'll at least eliminate that issue dealing with any missfires.

Bob
 

kywings

Seaman
Joined
Apr 11, 2011
Messages
58
Re: Force missfire

Checked some of the connectors last night also changed plugs. Ran well at 2500+rpms. Stalls at idle and low speeds. Also now Choke wont work cold. Oh and cant get over 4200 rpm, WOT has been around 4800. Boat is in the water all the time need to pull. Next weekend. I will check all the connections then.
 

jelecole

Cadet
Joined
Jun 18, 2011
Messages
8
Re: Force missfire

thanks for the post after reading this i checked mine. has been idiling rough found wire 4 loose. fix connections and now idils is perfect. well at least as good as exspected from a Force. thanks i can now stop scratching my head
 
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