thats a bad SOB !!!
That's news to me . I can't see it having oil injection with the low weight it is down to already.these are oil injection with a separate oil injection tank? no pre mix fuel?
Only problem I see with that is based on my past of being intensely into sleds for a time, I think addressing how a saw will be used (rolling it on it's side, upside down and such) might be a bit more difficult than a simple weighted pickup/filter like in the fuel tanks. Those oil pumps on injected sled motors and whatnot are gravity fed and don't have alot of "pickup" power. Add to that the fact that the reservior would be tiny and I think it would be pretty tricky to pull off. Matter of fact, I'll bet that's one of the reasons we haven't seen DI or OI in saws yet. You need the oil in the base and DI injectors are in the combustion chamber just like a diesel. Won't do a bit of good for the bottom end to shoot the oil into the chamber only.. and something else I have to wonder, how touchy a DI type injector might be to premix fuel and the various brands and types of oil??? I can see the new oil threads forming now!!!! LOP!No mistakes on the mix. No more straight gassed saws, unless the oil runs out.
Probably have a low oil shut off switch too.
Yes and no Wade. Some sleds I had injected oil into the intake boot between the carb and the reeds, others (newer) injected oil directly into the case right in line with the lower rod bearings. Many sled outer crank bearings are grease packed and sealed while the inners were lubed with oil. I myself haven't come across one that injects oil into both the carbs and case, but not saying they aren't out there. In any case, you gotta have OI by some method if you want to run DIOil injection in sleds do two things, they inject oil into the carb where its mixes with the fuel in the carb and drawn into the case, and it injects oil to the crank bearings for lubrication. Any saw with oil injection would need to have injection to the bearings.
Cool!I think Solo has done something like an oil injection already on a cutoff-saw. 881 with ilube.
https://de.solo.global/de/trennschleifer/31-881-trennschleifer-ilube.html
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Look into ETEC direct injection on Evinrude/Johnson outboards and Rotax snowmobile engines. Fuel is supplied at low pressure to the injector, high output electromagnets inside the injector are what builds the high fuel pressure and fires it off. All electronically controlled. Just need a stator to power the system.My opinion from an automotive standpoint, DI on a saw would add a bunch of weight and take up quite a bit of space.
I'm sure the pumps could be smaller, but they would still have to fairly large to generate the pressure (not sure how much would be required). I know the small GM engines using it are still about 700psi at idle and over 2,000psi on the higher end. Then you run into 1 time use crush type steel fuel lines and such.
Plus, mass would need to be added to the crank, as I see no other viable alternative to drive the pump.
All this is speculating that it would require substantial fuel pressure. Not sure what a saw would need in that aspect..