octain to use

[starman1700]

Hello, I bought a pontoon with a 2005 90 hp mercury used ,so no manuel what octain gas do yall use?

 

[galamb]

Manual calls for 86/87 octane with no more than 10% ethanol

 

[starman1700]

Thanks galamb,that's what I have been using ,just was not sure

 

[FishinLite]

Based on the manual you can use 10% ethanol blend for cars and trucks.

But if it were my boat, I would choose the non-oxygenated blend at the pump.
It tends to give you fewer problem and if you leave it in your tank or lines for a longer period of time it breaks down much more slowly.
The cost difference is usually less than a dollar a gallon. As small price to pay for a little peace of mind.

I generally add some "Seafoam" to my fill up based on the manufacturer recommendation.
Too much is not a good thing but a little never hurt.
My boat may sit in front of my house in the water without moving for a couple weeks due to the weather and other life interruptions.

Fish On......