Not all burn their oil. The older GM 2-stroke diesels and the huge ship 2-stroke diesels don't run the mix through the crankcase and use straight fuels. They have normal pressure-lube systems like four-strokes. They use superchargers to get the induction air into the cylinders.Oil injections just eliminates gas/oil premix... the engine is still burning fuel/oil/air like any other 2-stroke, which I think was the original point.
Old thread but as I'm new I'm catching up ...Interesting thread/discussion. Anyone care to pick it up again? I have wondered off an on over the years if a two stroke could be modified like the original poster was asking about, mostly just for the fun of seeing if it could be done....
This is the single biggest fantasy that there ever has been in the world of engines, second only to 2 strokes rev more than 4 strokes.Sir, with all due respect, you are incorrect. It is well known that at a given RPM 4 strokes generally have more torque.
Try setting your carby and oiling up correctly and you'll never touch your plug again. It probably fouls because you did touch your carby and oiling.Unfortunately one of the things you forgot to mention about 2 strokes is that their plugs foul readily unless cleaned religiously.
4 strokes need to rev way higher than a comparable 2 stroke and many freight trains are 2 stroke.2's are mechanically simpler but their higher RPM's are going to be more prone to failure simply because of high rpms. Look at a freight train, their wide open throttle is something like a few hundred RPM. And they will go half a million miles and they are mechanically very complex with lots of moving parts.
RPM has nothing to do with it, 2 stroke rings have ports to transverse, simply having less surface area to ride on and running over the ports edges causes faster wear but in balance 2 strokes are twice as fast to replace the rings, status quo. Also most 2 strokes sold are competition machines with thin rings than non-competition engines. 2 of 2 stroke bikes I have owned bought brand new, being a Suzuki TS250X trail bike and a Yamaha RZ350, both came with full warranty and neither were touched internally for around the 3 years I owned them riding daily to work and weekend rides, about 15,000kms each. Never touched the spark plugs in either by the way.What do you feel about 2 strokes automatically wearing out faster than 4's based on RPM? I don't necessarily agree with that. It depends more on HOW you run an engine than HOW FAST.
You obviously need to have more chats.I love chats like this. We learn so much!
Niels, a guy who I used to work next door to had Australia's largest collection of MZ's including a late model like yours. If you ever need to contact him PM me.I drove 80000km at 80% power on my single cylinder MZ 250 on one sparkplug and never decarbonized.
Well with that antiquated design what do you expect, maybe they should release a new model rather than stay with a 30 year old design, the cooling finning is awful, 1960's awful.This is what Peter Limbach says about their 2-strokes:
Limbach Flugmotoren recommends to remove pistons and cylinders and to
decarbonizes the pistons, rings and cylinders every 75h.
I didn't know there was enough power in those things to pull a fuel tanker.;^}I drove 80000km at 80% power on my single cylinder MZ 250 on one sparkplug and never decarbonized.
Se Subaru thread for picture
Reason for giving it away was my age.
Engine ran as well on final trip as on first.
Yeah. Cheap engines are all you are going sell to fly in the air space bellow 1k meters they just opened up. I see lots of detonations coming. The thing is, even a good two stroke is not cheap.with aviation coming to China in a big way I believe the market in 5 years will be flooded with small engines and ultralights so not a good business move me thinks.
Yes they are actually, that's the whole point of a 2 stroke.The thing is, even a good two stroke is not cheap.