Once I get past the break in cycle on my 900 ace, I’ll start mixing it 1/4 to 1/3 100 octane avgas, that stuff keeps way better than regular gas.Yeah wow, that would be super annoying. Our Neo+ doesn't do that. I heard 2 little pops one time as the engine came down to idle, but I'd be pretty unhappy if it was making that kinda noise all the time.
Curious what's making some of them do it. Fuel is the only thing that should be different between machines. I'm running ethanol free 87. For the machines that are knocking, what fuel are you running? Higher octane prevents detonation on my performance sleds, I mix 100LL avgas with premium for my RMK 800. I wonder if that would help these?
At least that’s the plan for the snowmobile to share the tank with the airplane.