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#1
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Mercruiser 5.6L melting sparkplug electrodes
Srange behavior here. 1988 5.7L Alpha One is melting about 5 spark plug
electrodes. Have tested everything we can think of. Any ideas? Thanks. |
#2
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#4
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timing, fuel flow, or vacuum leaks!
wrote in message ups.com... Srange behavior here. 1988 5.7L Alpha One is melting about 5 spark plug electrodes. Have tested everything we can think of. Any ideas? Thanks. |
#5
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Also worth checking is the heat range of the plugs you are using. Make sure
the plugs are those called for in the Mercruiser Manual not the GM Manual. They could be the same but likely are not. Butch "Woodchuck" wrote in message ... timing, fuel flow, or vacuum leaks! wrote in message ups.com... Srange behavior here. 1988 5.7L Alpha One is melting about 5 spark plug electrodes. Have tested everything we can think of. Any ideas? Thanks. |
#6
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Thanks guys. Fule pressure checked with guage is fine. Carb recently
rebuilt. Vacuum is normal at start up but does drop significantly at 4000 rpm. Any other ideas. All fuel lines have been checked and fuel pressure is right on. Strange stuff. Thanks for your help. |
#7
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wrote:
Thanks guys. Fule pressure checked with guage is fine. Carb recently rebuilt. Vacuum is normal at start up but does drop significantly at 4000 rpm. Any other ideas. All fuel lines have been checked and fuel pressure is right on. Strange stuff. Thanks for your help. The carb was recently rebuilt? That waves a red flag to me. Providing the timing is correct (that's about the easiest thing to check) I would think about having another look inside that carb. I may just be that something got messed up a little on reassembly. -Raf -- Misifus- Rafael Seibert http://www.ralphandsue.com |
#8
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She's lean, dude. Also, may be incorrect plug heat range, incorrect
timing advance curve contributing. Better fix it right away, before your motor melts down. JR wrote: Srange behavior here. 1988 5.7L Alpha One is melting about 5 spark plug electrodes. Have tested everything we can think of. Any ideas? Thanks. -- -------------------------------------------------------------- Home Page: http://www.seanet.com/~jasonrnorth |
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