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Two Engines To Make One


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#1 ol' stonebreaker ONLINE  

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Posted November 05, 2014 - 11:18 PM

The 5HP briggs on my chipper started burning oil this fall so tore it down and found everything was in good shape except the piston and rings. Started shopping around for parts and mentioned this to a good friend at coffee and he said he had one he'd give me that had some kind of spray pump attached and the pump blew a seal and forced water thru the crank seal. He'd already drained the milky oil out. Got it home and found the crank was 3/4" and I needed a 1". I wanted to start it before going thru swapping cranks and found the cyl was hydrolocked w/ milky oil. Got the piston at TDC w/ the plug out and kept pouring gas in the plug hole and blowing out w/ air. Finally got it to start and it sounded good. Pulled the head and could still see the crosshatch in the bore. Blocked the valves open, pulled the sump and surprise!! This had a ball brg on the PTO end and my old one didn't. Ok, so swapped the crank and used the sump off the old engine. Had to use the old flywheel nut and recoil because that end of the crank was different. Also had to swap the carb 'cause the carb on the new engine acted like it wasn't pumping good. Got it all together and fired it up and runs real smooth. I guess down the road I can get a new piston,rings and rod to fix up the old one and have a spare w/ 3/4" shaft for whatever. Can someone steer me to a piston kit, rod and gasket set for less than $140?
Mike
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#2 boyscout862 ONLINE  

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Posted November 06, 2014 - 07:05 AM

Try our sponsors. Good Luck, Rick



#3 LilysDad ONLINE  

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Posted November 06, 2014 - 08:02 AM

I think I would have shimmed the crank with a bushing before all that work.



#4 ol' stonebreaker ONLINE  

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Posted November 06, 2014 - 09:03 AM

I think I would have shimmed the crank with a bushing before all that work.


The thought crossed my mind but not knowing how good a fit it would have on the rotor I decided against it.
Mike

#5 dodge trucker OFFLINE  

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Posted November 23, 2014 - 01:59 PM

done that more than once, built one good engine from 2 (or more)

 

also had bushings made to "fatten" crankshafts too, before


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#6 MH81 ONLINE  

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Posted November 23, 2014 - 07:43 PM

Some of the best running engines I have ever owned were Heinz 57 units.
No shame there.

As for the piston and rings, :ditto: get all the info you can and give the sponsors a holler.
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