head bolt and spark plug

[101ranger]

hi all, first time posting, I have a 1987 Johnson gt 150 on a ranger 375v, started it up for the first time this year in the driveway with muffs and notest a couple head bolts had a few drips of water dripping from them , is this something I should look into? and what would be the best spark plug to run in this motor, I have herd 87 and 88 take different plugs and woundered what the difference was, thanks to all

 

[racerone]

Re: head bolt and spark plug

Pictures of leaks are always useful.----Could be the water jacket cover bolts that are leaking.

 

[itsaboattime]

Re: head bolt and spark plug

Welcome to Iboats!

I would absolutely look in to it. It could be indicative of a blown head gasket.

 

[boobie]

Re: head bolt and spark plug

Have you tried to tighten the leaking bolts up ??

 

[emdsapmgr]

Re: head bolt and spark plug

Agree with boobie, maybe the head bolts have lost their clamp load over the years. Retorque to original specs. Factory recommendation on plugs for a 1978-87 V6 crossflow: UL77V-that's a surface gap plug. 1988 and up crossflows use QL77JC4, a conventional J-gap plug.