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04-03-2017, 06:53 PM #1Member
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1974 to 1976 omc v4 crankcase or powerhead
As the title says, I need a powerhead or bare crankcase with a 3.5" bore to fit a 1976 135 motor.
Thanks.
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04-23-2017, 06:04 PM #25000 RPM
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I have a couple of them, already disassembled.
Block- $ 100, naked, (have a few exhaust humps,( $ 50) but stuffers are Questionable)
Crank- $ 50
rods- $ 20 ea
* note heads are NOT included in above. all are plus shipping.
Located in Florence SC.
will also barter /trade/ v4 looper parts.Last edited by thornl01; 04-23-2017 at 06:14 PM.
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04-23-2017, 10:33 PM #3
A buddy of mine has an old 135 that's a runner. He might let it go, but I bet he would want to keep the heads! I think it's a '74. PM me if you want me to ask him about it.
Josh Peterson
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04-24-2017, 07:58 AM #4Member
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Thanks for the help. I may check with you abouut that. Excuse my ignorance, but what's so special about the heads?
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04-24-2017, 10:07 AM #5
They have a smaller combustion chamber for higher compression. Some race classes don't permit "modified" parts but will allow swapping "stock" parts that are interchangeable. So instead of cutting the heads on a 140, you find a set of early 135 heads to boost the compression and it's "legal."
Those early 135's have 145-150 psi cranking compression if they're healthy. It's too much for today's pump gas. If you run a tank of 87-89 octane through one you'll burn it down. Best to use some later 140 heads anyway, or take some timing out for recreational use.Josh Peterson
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04-24-2017, 11:55 AM #6Member
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I didn't know that. Thanks.
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