Old gas in boat; To drain or not to drain

[drifter106]

I use 91 octane...when my boat sits for an extended period of time I will make sure I add fresh gas and that I have a 50/50 mixture. Then I put seafoam in it. Did it the other day and ran it all day at Melvern in the fog and it ran great. MY boat had sat for at least a year with old gas. Put fresh gas in it to bring it up to the 50/50 mixture.

[Spine guy]

You guys are great.
Where else can a person get decades combined experience from knowledgeable "boat guys".
Looked up Seafoam since several have mentioned it. Website says it can stabilize fuel for up to two years. Good for both fuel injected and carbureted engines.
Thanks again.

[IceNitro]

All,
Many thanks for the advice.
Seafoam has served me for many years, its good stuff... I'll probably go with Chatt's middle of the road solution.

I would throw in a can of Heat for good measure.

[cevans]

Star Tron additive will keep gas fresh,for 2 years. Can be bought at Walmart and some Automotive stores. I use it on my gas as well as Seafoam and never had a problem on my boat motors, chain saws, small motors, atv, or generator. All start great when they sit. I also use pure unleaded gas as well.