Aircraftsalz
Thrust built Dasa Power
- Location
- Off site
Run it (32:1) 4 oz of oil to 1 gallon of gas. Put it back together & ride it!
What gas with TL and 35cc domes (150psi)
- Thread starter jjchambers
- Start date
Ryan_G
Yamaha
- Location
- Fresno, CA
Wouldn't richening the oil/fuel mixture lean out the air/fuel mixture going to the engine?
Yes it would...50:1 with a good oil sounds better to me.
well maybe I got it all backwards. Additional input is welcome.
Aircraftsalz
Thrust built Dasa Power
- Location
- Off site
Your not doing the motor any favors running less oil, say 50:1. If its jetted right 32:1 will not foul any plugs, & gives the motor a little extra protection. We run 32:1 in all our ski's for a 701 with a B pipe to my 860 TS motor. I seen a thread on this a while ago.
Just my .02 cents, I use to run 40-50:1 ratios until someone explained it to me why to give a little more oil or pay a little more later $.
Just my .02 cents, I use to run 40-50:1 ratios until someone explained it to me why to give a little more oil or pay a little more later $.
jjchambers
got me my braaapp!!
- Location
- Sarasota, FL
to all the people that responded about oil (Aircraftsalz, jfw432, slyan23, etc..) based on the pics I posted the engine is obviously running on the lean side, that we can all confirm is correct. Please explain to me:
1) what is all the black stuff is on the piston top?
2) when we talk lean and rich exactly what are we talking about, the air, fuel or oil?
3) if I go 32:1, I understand I will have more oil in my mixture which will give me more lubrication but will that create more black stuff on the piston top = a lean condition....
If there is a site that explains all this by all means send me there and I'll read all day. But if someone has a good explanation of it then go ahead and post.
thanks for all the help so far guys.
J
1) what is all the black stuff is on the piston top?
2) when we talk lean and rich exactly what are we talking about, the air, fuel or oil?
3) if I go 32:1, I understand I will have more oil in my mixture which will give me more lubrication but will that create more black stuff on the piston top = a lean condition....
If there is a site that explains all this by all means send me there and I'll read all day. But if someone has a good explanation of it then go ahead and post.
thanks for all the help so far guys.
J
- Location
- Palm Beach County
yea dielectric grease on all your electriacl connections, i just use a marine grade grease
put some grease aroung the o-rings when you are replacing them
Ryan_G
Yamaha
- Location
- Fresno, CA
1. Carbon.
2. Both. A rich oil/fuel mixture means less fuel and more oil, therefore less fuel going into the engine causing the air fuel mixture to be slightly leaner.
3. http://www.x-h2o.com/threads/42421&highlight=lean+condition
Just start searching old threads that discuss this type of stuff. It comes up about once a month. Look through the driveline section. Search key words like (lean condition, piston wash, ada torque, carb tuning)
Check out watcon's tuning tips in the tech FAQ. I have found this to be the most practicle way to tune a ski. You definatly want to read the sbn manual so that you understand how the carb works and what your adjustments are doing. If you really want to do some reading get the books from watcon. http://watcon.com/manuals.htm
2. Both. A rich oil/fuel mixture means less fuel and more oil, therefore less fuel going into the engine causing the air fuel mixture to be slightly leaner.
3. http://www.x-h2o.com/threads/42421&highlight=lean+condition
Just start searching old threads that discuss this type of stuff. It comes up about once a month. Look through the driveline section. Search key words like (lean condition, piston wash, ada torque, carb tuning)
Check out watcon's tuning tips in the tech FAQ. I have found this to be the most practicle way to tune a ski. You definatly want to read the sbn manual so that you understand how the carb works and what your adjustments are doing. If you really want to do some reading get the books from watcon. http://watcon.com/manuals.htm
jjchambers
got me my braaapp!!
- Location
- Sarasota, FL
So I've been doing a bunch of reading and now have a couple more ?'s
Based on the pic that slyan23 posted: are they talking about lean/rich air/fuel ratio or fuel/oil ratio? You guys said and based on the pic, that I am running lean.
If the picture is talking about the fuel/oil ratio then I would need to add more oil (32:1) so my gas/oil ratio richens up to get more like the ideal picture.
If the picture is talking about the fuel/air ratio then I would need to run less oil (say 45 or 50:1) so my air/fuel ratio richens up to get more like the ideal picture.
So it all comes down to what is that picture talking about?
Thanks,
Jeremiah
Based on the pic that slyan23 posted: are they talking about lean/rich air/fuel ratio or fuel/oil ratio? You guys said and based on the pic, that I am running lean.
If the picture is talking about the fuel/oil ratio then I would need to add more oil (32:1) so my gas/oil ratio richens up to get more like the ideal picture.
If the picture is talking about the fuel/air ratio then I would need to run less oil (say 45 or 50:1) so my air/fuel ratio richens up to get more like the ideal picture.
So it all comes down to what is that picture talking about?
Thanks,
Jeremiah
jjchambers
got me my braaapp!!
- Location
- Sarasota, FL
bump for the afternoon desk jockeys...
and no I can't put it together and ride it b/c I'm still waiting on registration so I can get it titled here. I think I'm gonna D-cut my ride plate and bore the nozzle out this weekend while I'm waiting. I'm putting a limiting rope on today and got the new o-rings so I'll clean that up and put the head back on.
J
and no I can't put it together and ride it b/c I'm still waiting on registration so I can get it titled here. I think I'm gonna D-cut my ride plate and bore the nozzle out this weekend while I'm waiting. I'm putting a limiting rope on today and got the new o-rings so I'll clean that up and put the head back on.
J
Generally when someone talks about lean/rich conditions they are talking about air/fuel and this can be changed by adjusting the carb adjustment screws along with other things that I won't go into. You can slightly modify air/fuel mixture by adding more or less oil to accomodate a rich or lean condition in your engine but it is not the way to fix a problem. Do some reading on carb tuning. You may also want to read the mikuni SBN tuning manual.
jjchambers
got me my braaapp!!
- Location
- Sarasota, FL
I understand your thinking but I am specifically talking about that picture that was posted of the piston wash. In that picture are they talking about gas/oil mixture or air/gas mixture?
Thanks,
Jeremiah
jjchambers
got me my braaapp!!
- Location
- Sarasota, FL
ttt
Same thing... The reason piston wash is a way to judge lean/rich conditions is because the fuel acts as a cleaning agent for the split second that it touches the piston. If you have too much fuel, the fuel stays on longer and also doesn't burn completely. Therefore, in a rich engine, the piston is nice and clean...but that's bad.
If you're worried, read up on carb tuning like I suggested before.
If you're worried, read up on carb tuning like I suggested before.