What engine tuner do you use for EFI outboards?

[rejesterd]

I was just reading the Winterization sticky, and I realized I didn't do the recommended step of spraying engine tuner into the fuel injection tubes before fogging it. I assume I can still do this step now to remove any carbon buildup that I might still have from last season. I'm just wondering what tuner people would recommend for a 2011 Yamaha F50 (EFI). Yamaha's Combustion Chamber Cleaner is $8 for a can.. is it worth it, or is there something cheaper that's just as good/safe to use? Thanks.

[pstephens46]

Are you sure you need to use it?

I use the Yamaha Ring Free Plus with every tank of gas. Never had any issues.

Are you having issues?

[rejesterd]

No obvious observable issues, except the engine does seem slightly more shaky than normal at idle. But the reason I thought of doing this is because it's on this forum's Winterization procedure. It just seems like a cheap, easy thing to do to prevent carbon buildup. I'm just wondering if there's anything cheaper than $8.

I also treat the fuel, so I assume I don't have much gunk in there to begin with.. but I'm not the original owner, and I'm a big fan of easy/cheap/fast preventative maintenance that can help extend the life of the engine or improve performance.

[pstephens46]

When it comes to Yamaha anything, $8 is not bad. Ring Free is about $27 for 12oz. Treats 120 gallons. There are all sorts of decarb treatments you can use. Valvetech, etc. Not sure if any would be cheaper.