I had head work done on a 97 XP and 99 XPL (plus a complete engine rebuild on this unit) 20 years ago and had PPG work the heads with their PPG Level 1 kit (head rework and carbs modified). I believe I told them to set it for 93 octane but not sure since I also had other skis modified years ago so it could be worked for 91. Old paperwork I have does not give me the answer.
Is there any way to tell which octane I really need to use? I have always used 93 but would rather like to switch to 91 non ethanol if I know I'm safe since I have found that the dried ethanol deposits clogged my accelerator pump lines which I had to clean out. There is only 91 free ethanol gas around here. 93 is 10% ethanol.
It would be nice to know if I can run 91, but not sure if a compression test really gives me a definite answer.
Worst case scenario is i run 93 and drain before winter and put in a little 91 non-ethanol to run it through.
Is there any way to tell which octane I really need to use? I have always used 93 but would rather like to switch to 91 non ethanol if I know I'm safe since I have found that the dried ethanol deposits clogged my accelerator pump lines which I had to clean out. There is only 91 free ethanol gas around here. 93 is 10% ethanol.
It would be nice to know if I can run 91, but not sure if a compression test really gives me a definite answer.
Worst case scenario is i run 93 and drain before winter and put in a little 91 non-ethanol to run it through.
