How Not to hone cylinders
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DavidBarkey
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How Not to hone cylinders
Not sure if you can make it out . but this is how not hone cylinder walls . Someone tryed to hone and rering this engine . but ended up damaging the cylinder walls to the point it now need boring out . If they had not done this I could have honed and put a set of std. rings and pistons in . It would be at the outer limits but would have been fine for what it is used for .
Dave
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Harry
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Re: How Not to hone cylinders
I see what you’re talking about David. No cross hatch marks visible there. 
Harry
Harry1973 444, 1974 644, 1976 446, 1977 646, 1986 226
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RoamingGnome
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Re: How Not to hone cylinders
Yikes!
Wonder what they used? a 60 grit flapwheel on a drill?
Good luck with fixing that up...
Wonder what they used? a 60 grit flapwheel on a drill?
Good luck with fixing that up...
'68 Case 195, '84 Case 446, '88 Ingersoll 222 - and 1965 Case 530ck (fullsize backhoe)
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DavidBarkey
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Re: How Not to hone cylinders
Yeah , that is what I was thinking . once rebuild kit is here it will go out for machining .RoamingGnome wrote: ↑Sun Aug 18, 2024 5:19 pm Yikes!
Wonder what they used? a 60 grit flapwheel on a drill?
Good luck with fixing that up...
Dave
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Eugen
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Re: How Not to hone cylinders
Hard to see but I take your word for it. What engine is that with two cylinders? We want the whole story 
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DavidBarkey
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Re: How Not to hone cylinders
A friend brought me an old utility golf cart to fix the engine . It has been sitting some time and wanted to get it running properly . It ran but not well went parked and he wanted it rebuilt .
It is a Robins EH29c. from a EZGO . Air cooled over head cam . Both pistons come to TDC at the same time but fire 360 degrees apart and use waist spark system like an Onan . Pretty efficient engine . The frustrating part is the cost to do it because of the damage from the guy before him that "fixed it up " almost double the cost to rebuild it . 
Dave
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Eugen
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Re: How Not to hone cylinders
Very interesting engine, in the sense that it seems the same design as the Onan J60 which I had in the trencher. Too bad about that but boring it to next size should fix it. Sucks that it means buying new next size pistons, rings, and all that, but then it'll be like a new engine, so maybe that's ok in the end, IF you can still find those pistons to buy that is. 
