Axis Wakeboard Boat Forum

For those with the pcm 409 what are you running? 2017 T23 here and Manual says 87 with less then 10% ethanol but then throws in the "for optimal performance" use 93. Not even available local here

I use 93 if available, if not 91. Probably overkill, but I don't want any ethanol in there. It is hard on seals & gaskets.

Is the ethanol in these engines any harder on the seals and gaskets than the same motor in a car/truck? To my knowledge my truck runs fine on 87. Is it an issue because they're constantly run at higher RPM?

My old boat it recommended 93 and if I didn't the engine would ping. With the 409 I have been using 87 and haven't heard or felt one hiccup.


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I use 87. 200 hours and no problems

Indmar L96 engine using 89 octane per manual. I'm at 594 elevation.

Thanks gents,


Have been filling it up with 91 but will consider 87 next tank and see if I hear or feel any difference. Pretty sure 91 in ca still has ethanol but I could be wrong

Can't get 93 around here (probably an altitude thing). The pumps have 85, 87, and 91. I run 85 in the car without any problems. The boat manual says 87 minimum, and that's all I can get at the lake. But I put 91 in there when I'm filling it at the gas station. This is all 10% ethanol gas.

There is an 88 no-ethanol station around here though. I plan to put that in there for the winter at least. If it was more convenient, maybe that's all I'd use. It costs the same as the 91 with ethanol.

Download the PureGas App to find fuel without ethanol. That is all I have ever used in my boat. It is typically 91-93 octane Marine fuel

Why do yall waste money on non-ethanol gas? All marine engines since 2007 have been engineered to work just fine with ethanol gas. I've spoken directly to PCM about this. They claim it's a waste.