My LP conversion is running great but I am having issues with it eating plugs up. I am running the hottest Delco plug I can get at the parts store in it now.

What are the rest of you running?

I know LP motors are hard on plugs but this seems to be a bit much. I am thinking of switching to the Denso plugs we put in the machines at work but they are a bit 'spensive and I can't get a cross match on the P/N to a Delco or cheaper plug.

good question, i have no idea what plugs are in mine, buts ran fine all summer and i still have points ignition too. jIMMy

Originally posted by DUG
eating plugs up. I am running the hottest Delco plug I can get

If it's eating plugs, you need a colder plug

Colder? Really?

My boss claims you need a much hotter plug for LP and that is the problem. I don't really know enough about it to know for sure but it made sense to me :)

Just curious but what is the logic behind going colder if the plugs are not getting good life?

Don't know the logic behind the use of a cooler plug, however from all the info I have read on the subject, the concensus is to run one step colder than recommended heat range. :D Give it a try.

colder means that the plug can transfer heat away faster than a hotter plug.

Hotter plugs resist fouling....there's virtually no fouling with LPG:cool:

this is what i got from propane guy. he told me to tune plugs one
colder than stock to avoid eating them.

Chris G.