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Antique Gas Engine Discussion

Jacobsen 10-Acre reassembly

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Old 04-02-2005, 02:43:03 PM
Leonard Keifer Leonard Keifer is offline
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Default Jacobsen 10-Acre reassembly

Soon I'll be ready to put the piston back in my Jacobsen 10-Acre engine. From the looks of the "expanded" top of the cylinder and the bevel on the crankcase end of the cylinder I assume the piston goes in from the bottom. Is this correct?

I marked the crank gear and the cam gear before I took the crank out so I think I'll have the engine timed when I reassemble, probably won't make much difference for a while since I don't have a mag and haven't gotten the carb cleaned and freed up yet.
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Old 04-03-2005, 10:09:07 AM
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Elden DuRand Elden DuRand is offline
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Default Re: Jacobsen 10-Acre reassembly

On some engines, you could put the piston in from either end of the cylinder. I think the bevel at the bottom is to help you if you want to pull the piston without removing the head.

On some other engines, the top of the cylinder (above the piston travel) like the F-M Type T (Jack of All Trades) wasn't machined and you had no choice but to put the piston in from the lower end of the cylinder.

Take care - Elden
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