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Discussion Starter · #1 ·
Ok, I have looked everywhere for the torque specs for the head bolts. I found the engine assembly manual, but I could not find anywhere that specified the torque spec. I was berated in my previous post about modern engine oil because I mentioned it leaked a little, so I have now ordered a new gasket set. Can I reuse the old bolts, or should I get new ones. Then what should they torqued to. I realize I could just look up the torque specs for that size bolt, but it seems there is probably a factory recommended spec.
 

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Here is a copy of page 17 from the original manual - mentions torque spec for the bolts and to do it in three steps.
 

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Whether or not to use new bolts depends on the bolt strength and whether or not the original torque value puts the bolt into yield. At the values given I would suggest not i.e. on a standard bolt in metric terms then the size of the bolt and torque values specified mean you can use them approximately 3 times before any degradation sets is likely to set in . In fact, in my opinion the values given seem rather low for a head bolt.
 

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Discussion Starter · #6 ·
It's like a brand new tractor, or engine at least. So I finally got around to replacing the head gasket on Saturday. While I was in there I cleaned up all the deposits and other nasty crap. Re-assembled everything and got it fired up, but didn't really use it on Saturday. Today I mowed the yard with it, and it was like I had a 5 HP motor before, now I actually have 10. Before I had to mow pretty much everything in L2, sometimes L3 if it was light, even down to L1 if it was really thick. Today the grass level was L2 -L3 in the old tractor. I did both yards, which usually takes 2 hours or so, in an hour. Never had to take it out of H2. I tried H3 but that didnt give it enough time to actually cut the grass. It really is like I have a whole new tractor. Wish I would have done this 2 years ago when I bought it.
 

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I agree with you ,Chris,, Dr. B and chev.. It's a lawn mower for crying out loud .!! Your'e not trying to build a dragster..

Mrfixit;; follow above as mentioned,, in sequence,, you'll be fine..

I had to do mine once,, in a hurry,, Would have liked to run it a few min. and then re torque. But it is a small chore with the shroud and coil and other things.. I snugged them all up,, repeated ( in sequence ) and did it a third time.. It's lasted years...
 
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