Outboard motor question

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pikewi

pikewi

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Howdy
Not a mopar but....I have to put a new head gasket on a 25 year old merc 2 cycle,25 hp.
Should I use gasket sealer and what torque for the bolts?
Thanks for the help
Pike
 
pikewi said:
Howdy
Not a mopar but....I have to put a new head gasket on a 25 year old merc 2 cycle,25 hp.
Should I use gasket sealer and what torque for the bolts?
Thanks for the help
Pike
Click to expand...

It depends on what type of gasket you use. If it's a composition style, no sealer. If it's the steel shim type, spray it with Copper Kote. Opinions vary for sealant on bolts, but I always do it on every head bolt I touch, whether they go into water, or they are blind holes. Keeps them from seizing up if you ever have to remove them and affects torque very, very little. I always use red high tempo RTV. Sorry, I cannot help with the bolt torque. What's the thread size and do they screw into iron or aluminum?
 
pikewi said:
Howdy
Not a mopar but....I have to put a new head gasket on a 25 year old merc 2 cycle,25 hp.
Should I use gasket sealer and what torque for the bolts?
Thanks for the help
Pike
Click to expand...

That should be a no on the sealer. As for the Torque specs, you need to google it.... I am sure the info is out there.....

JW
 
Post the model and brand of outboard. I have some service literature on OMC/ Johnson/ Evinrude
 
RustyRatRod said:
It depends on what type of gasket you use. If it's a composition style, no sealer. If it's the steel shim type, spray it with Copper Kote. Opinions vary for sealant on bolts, but I always do it on every head bolt I touch, whether they go into water, or they are blind holes. Keeps them from seizing up if you ever have to remove them and affects torque very, very little. I always use red high tempo RTV. Sorry, I cannot help with the bolt torque. What's the thread size and do they screw into iron or aluminum?
Click to expand...
 
Thanks Rob.
Composition gasket. I haven't removed the bolts yet
 
Go to Marineengine.com and dig around thru there. I downloaded factory parts manual. Handy as heck. I'll chk once I'm home from work.
 
Thinking they are 5/16 bolts. Guessing at 15 foot lbs. or 180 inch lbs.
 
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