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.