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Have a emco max 11 lathe and the gear box oil is turning to glue. Trying to clean with presole, seems to work, but would like to take out the primary gear train to get in better to clean.. Took motor belt off and bearing cover. Should pull out yes. If it comes out ill take out the...

Jim got me started on looking at engines from a engineering / machinist perspective, before that just dremel bandit. Really miss the guy had a lot of good times.

thanks appreciate you time, did find similar application, thanks again for your interest.

My passion is the SAWs ran for many years in district 1 with jim allen. I ran a 45 bored to 58 in 60 class, got in the 90s with jim before andy brown set record in the 120s. heres some photos jim and his over bored 90 crap shooter, mine is the silver boat. We both had bar stock motor with...

Ran this weekend after i cleaned with 500 paper. have photos. Have slotted rod from performance, .062 slot seems big , but holding up they also gave me a new crank pin over size by 2 or 3 tens. Both engines are running 19000 , to 19500. The engine with my piston started running hot and...

ok thanks.

I'm still researching the temp on hardness , hit up on you guys for additional info thanks.

I have tryed 7075 on nitro engine connecting rod, when heated to a certain temperture the bottom end would let go. The bottom was a bushing ( rpm above 20,000 Gas engines get very hot dont thing it would hold up, maybe hate to have a engine let go, expensive. In low temp. its excellent.

Hard to tell if mine has more , running this weekend. Will disassemble and photo to see what you think. I take 500 and clean it up, to check for the next run. Spoke to jim schaeffer at ABC props very knowledgeable, stated 950 F for 6 hours and air cool. Seems like high temp, my only...

These are 29s ( 1mm crank) . Zenoah piston dont scuff, or the korean pistons dont. 4032 does ? There is heat treatment options , but they require sending out . It not cost effective for one or two pistons. It is effective the hardness is raised a few points. I dont know if the scuffing...

clearance is good , .004 . Made same style piston. seens to scuff easy. thought it might be the expanding. Or it needs heat treatment for additional hardness.?? The stock piston is cast seems to ware better. here is what im doing rc hydro plane the Road runner. Oh rpm is 17 to 20,000...

The original engine was side exhaust they dont make rear exhaust engines anymore. You can get a korean piston , but they can take hi rpm. Had to make my own. its working , but its scuffs easy . Heres a photo of my rc hydro plane . I opted to run rear exhaust, its a twin engine. The...

Made a piston for a RC Zenoah gas engine out of 4032 alum. Seem to expanding when hot the motor is in a rc twin engine boat. The motor with the factory cast piston is stable runs good. The one that I made is running hot. appreciate any heat treat info. to cure my problem. thanks rich.barile