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Josh
backyard mechanic
Joined: 04 Oct 2001
Posts: 602
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 Posted: Sat Sep 13, 2003 9:30 pm Post subject: engine "run on" |
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| Anyone ever had any problem with gemini engines "running on" or pre igniting after you turn them off? i have a 32/36 weber? does the engine running rich cause this. and it doesnt idle too high either i duno about the timing i think it's ok, about 12degrees |
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Stock TE
backyard mechanic
Joined: 12 Mar 2002
Posts: 853
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| Posted: Sat Sep 13, 2003 9:40 pm Post subject: Re: engine "run on" |
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| Running rich is one cause. There are a few others but cant remember them. |
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HOP_A_LONG
tinkerer
Joined: 27 Aug 2003
Posts: 274
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| Posted: Sun Sep 14, 2003 5:55 pm Post subject: Re: engine "run on" |
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| Its called dieselling, look it up. the name should be a bit of a giveaway |
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Josh
backyard mechanic
Joined: 04 Oct 2001
Posts: 602
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| Posted: Sun Sep 14, 2003 10:46 pm Post subject: Re: engine "run on" |
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| too much compression? |
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S N 3 A K Y
tinkerer
Joined: 18 Jul 2003
Posts: 153
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| Posted: Mon Sep 15, 2003 3:10 am Post subject: Re: engine "run on" |
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"i duno about the timing i think it's ok, about 12 degrees"
You may have already found your problem, if you dont know what advance you're running then grab a timing light and find out for sure.
Common causes are too much advance, bad/poor fuel quality and overall bad tuning. Get a set of new plugs, re-adjust the timing back to approx 8-9 deg BTDC, wind the mixture screw in a little if you think it's running rich, then wind the idle screw in a little to raise the idle to approx 750rpm.
Without a little more info on you're set-up it's hard to determine what it could be, but generally the same principles apply to all engines.
S N 3 A K Y |
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Josh
backyard mechanic
Joined: 04 Oct 2001
Posts: 602
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| Posted: Tue Sep 16, 2003 12:01 am Post subject: Re: engine "run on" |
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Arr yer cheers
I wacked the snapon timing light on it
I got 12 degrees at idle and 38 degrees at 5000rpm |
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