Reply To: Hayter -JLO

[davidbliss]

I suppose going back many years just took it for granted some engines although looked the same but weren’t and a real pain to work on, Aspera made light duty engines without the needle roller big and little end bearings and industrial with, Teles used them on there chainsaws, I had one brought to me that was running a bit under powered and flat as had so many, took the exhaust gauze out and it made a huge difference, as only had a few screws holding the complete exhaust on took it off to look at the exhaust ports, they looked like never been run, turning the engine over to look at the piston that again looked new, just noticed bottom of piston skirt went above bottom of the exhaust ports so was sucking back in exhaust gasses, well have a idea fitted barrel and piston off a scrapper Fly-mow,as had a wight coloured barrel on a blue saw but where did the odd ball piston a barrel come off or balls up of manufacture, the bit interesting was the scrapper piston skirt was longer and shaped to cover the exhaust ports. It didn’t sound much different but seemed to have twice the torque. The JLO engines were just longer lived often neglected but kept going.