srt20
Active member
X2 This guy has it correct!!
Mixing your first tank of gas.
- Thread starter mikedrh
- Start date
X2 This guy has it correct!!
This is going to be one of those subjects that everybody is going to have stong opions on. The bottom line on this is if you do not premix the first tank on a new sled or a newly rebuild motor 99% of the time there will be no problems and the engine will not burn down because of lack of oil. But that 1% of the time were the oil pump is not working properly the premix may save it and give you the chance to discover the problem before you have a major issue. For me it is cheep insurance and is the break in procedures in the repair manual for one of my sleds (03 F7). I have done this on every motor that I have rebuilt and all the new sleds I have had with no problems. The only differance is they smoked a little bit more.
Or it may melt it down because of a lean fuel mix. The key word for both statements is "may".
I was only trying to make the point that too much oil in the tank "may" be a problem.
trailshredder
Member
This is not true at all.
srt20
Active member
This is completely incorrect. You will not burndown an engine because of to much oil. 2-stroke oil is meant to MIX with gasoline. Also, if you do happen to dump 3 gallons of oil in with 6 gallons of gas, your plugs will foul before your pistons have a chance to even get anywhere near up to temperature. And if for some ungodly reason your plugs didnt foul, and your injectors didnt plug up, you in cylinder temps would never get anywhere near 1200*F because oil burns alot slower than gas. No explosion, no heat. The only way you could possibly run that much oil, is to have extremely high compression ratio, like that of a diesel engine. And with ports instead of valves in the engine, that aint gonna happen.
Alot of BS in this thread.
Running pre-mix in a new, or rebuilt machine for the first tank to check to make sure the oil pump is working properly is a great idea. However, it does not help seat the rings. If you want to seat the rings properly, take it out and beat the snot out of it for a little while. Get it fully up to temp, no WOT for long distances, no steady throttle for long distances, just up and down the RPM range constantly. Get er good and warm, and let it sit over night to cool completely. Thats the proper way.
Having said all that, the manufacturers are not going rely on the consumers to PROPERLY break in the engine. You can do pretty much do whatever you want to them, and MOST of the time you will be fine. I dont know for a fact, but I suspect the engines are all ran for at least a few minutes before they leave the factory.
I am sure if you put a gallon of oil in the tank you might have problems i.e. fouling plugs or won't run at all. But to add enough to lean it out and burn it down I don't think that is possible. But for all of you that want to know how much to add that depends on the make model and year of the sled and at what ratio the oil system is set for. I don't want to give an exact amount because someone out there will hold me to it if they have trouble. You have to be smart about it and crunch the numbers for your sled or ask your dealer. But I will tell you is what I do to deturmine the amount. I find the recomended injection ratio of the system and mix the first tank at the same ratio. If the system is working properly I get double the normal oil and it smokes a little more. If the system is not working I get the recomended mixture.
srt20
Active member
If you want to, sure. I personally would rather not have to carry oil around with me, but maybe you just off-trail and dont burn more than a tank at a time.
michaeladams
New member
x10