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 Post subject: Re: 750 Weber woes - same same but different?
PostPosted: Mon Apr 17, 2017 3:28 pm 
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Joined: Sun Jul 30, 2006 12:00 am
Posts: 208
Location: Chicago-NW Suburb
model: 750 Paso
year: 1988
Check for voltage drop throughout the igniton circuit. I had stumbling, misses, fouling of plugs due to fouled contacts in the off/run/off switch. Biggest voltage loss was across it, and from there it feeds the coils. Coils were not getting sufficient voltage. I first tested before bringing out the vom, by cranking while in off position, and while spinning over, I flipped switch to run. It would start much better when I did that, so I opened the switch to find it grungy, and a clean up of it solved the fouling of forward cylinder plug and the stumbling and misses.


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 Post subject: Re: 750 Weber woes - same same but different?
PostPosted: Mon Apr 24, 2017 4:51 am 
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Joined: Wed Mar 02, 2016 2:52 am
Posts: 6
Location: USA
model: 750 Paso
year: 1986
Gotcha, there is quite a drop at the coil - 7.5 at both, so that must be something upstream. Will have a look at the switch.

I can confirm that it's running on the front cylinder only. The weird bit is that I get spark at both. Tried a new plug and get some intermittent back fires and an occasional stumble when I pull the known-running plug cap and try to run on just the rear. With the front plug cap pulled, wouldn't I have enough juice to run just the rear? Should probably avoid too much logic. Will do some more poking tomorrow.


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