Long but interesting.....It's coming
- Thread starter Fred1956
- Start date
desertgasser300
Banned
Good read.
this really makes me wanna swap my 300 to a 125 an do some modding 
but i guess i'll keep on dreaming until someone has tried it before me
still it does make me happy wth my choice to go for 2T.
i allready was convinced of the power,tractability and agility, but now i'm even more convinced that out 2T will be improved in the future and maybe we can even perform some of the mods ourselfs, if not allready
cheers guys,
hannes.
but i guess i'll keep on dreaming until someone has tried it before me
still it does make me happy wth my choice to go for 2T.
i allready was convinced of the power,tractability and agility, but now i'm even more convinced that out 2T will be improved in the future and maybe we can even perform some of the mods ourselfs, if not allready
cheers guys,
hannes.
I'm a snowmobiler as well and have ridden ski-doo's new etec 800, and have a pre-etec 800. The etec uses roughly 30% less fuel than the carbed 800 and literally only half of the injection oil or less than the prior generation of engines. The etec's feel almost electric and have extremely linear power delivery.
One issue that is arising with the direct injection 2-stroke engine, etec included, is lubrication of the crank. The carbed engine allowed crank lubrication through the fuel / air / oil mixture going through the crankcase while the new injector system works similar to an automotive injector, injecting the fuel / oil directly into the combustion chamber during the compression stroke. No fuel / oil mixture is allowed to enter the crank this way and lubricate bearings and rods. This is largley how they are getting the clean burn with more efficiency as there is no unburnt fuel escaping through the exhaust ports via the crank.
Ski-doo has tried to address the problem by using sealed crank bearings and for the most part they are working well. But occasionally there is a failure. A leaking bearing seal, and all of the "isoflex" grease will be pushed into the crank. Of course unless you physically inspected the bearings you would never know that this had happened until the bearing started to fail. Of all the engine failures that I've heard of regarding the etec's, they've been bottom end failures. If any of you are familiar with snowmobiles, then you'll know as well that they are all ticking time bombs and are going to experience an engine failure sooner or later, regardless of the decal on the side.
I think moving forward we'll see a 2-stroke engine, direct injection, that has a crank lubricated via an oil bath. Likely the same oil that is lubricating the tranny, same system as 4-strokes are using.
Personally if I was going to buy a new sled today, it would be an etec 800. I think they are the most innovative, efficient, and powerful 2-stroke engine available today.
One issue that is arising with the direct injection 2-stroke engine, etec included, is lubrication of the crank. The carbed engine allowed crank lubrication through the fuel / air / oil mixture going through the crankcase while the new injector system works similar to an automotive injector, injecting the fuel / oil directly into the combustion chamber during the compression stroke. No fuel / oil mixture is allowed to enter the crank this way and lubricate bearings and rods. This is largley how they are getting the clean burn with more efficiency as there is no unburnt fuel escaping through the exhaust ports via the crank.
Ski-doo has tried to address the problem by using sealed crank bearings and for the most part they are working well. But occasionally there is a failure. A leaking bearing seal, and all of the "isoflex" grease will be pushed into the crank. Of course unless you physically inspected the bearings you would never know that this had happened until the bearing started to fail. Of all the engine failures that I've heard of regarding the etec's, they've been bottom end failures. If any of you are familiar with snowmobiles, then you'll know as well that they are all ticking time bombs and are going to experience an engine failure sooner or later, regardless of the decal on the side.
I think moving forward we'll see a 2-stroke engine, direct injection, that has a crank lubricated via an oil bath. Likely the same oil that is lubricating the tranny, same system as 4-strokes are using.
Personally if I was going to buy a new sled today, it would be an etec 800. I think they are the most innovative, efficient, and powerful 2-stroke engine available today.
