Whose 2 stroke oil do you suggest and what concentration?

fuel cells with internal paint? That sucks.

What's the name of the CRC product?

Keith

I know lucas is oily to the touch. I used it in my snowmobile sdinjected. Seemed ok but that was just a preseason.
is lucas injector cleaner good?

The old favorite. Citgo (Mystik is same company) sea and snow conventional or semi-synthetic. You are in MI so you should see this everywhere, Mom and Pops, chain stores, Fleet and Farm's etc.

Prob is that some synthetic 2 strokes are known not to cling to parts for long.

I mix it same as my 2 stroke lawn/tree tools. 40:1. I pour it right into an empty fuel water separator. But, my system doesn't return to the tank. Start engine and when you start to see blue smoke out of the tailpipes, the 2 stroke mix is in your carb/fuel injectors/ and rails. Oh and cyl walls. :)

I have done this with my 525's every fall before storing the boat for the last 7 seasons. I coughed a motor the first season that I bought the boat and upon inspection the injectors were badly plugged and corroded. I swapped out all 24 injectors (triple 525's) when we rebuilt the blown motor, and have followed this method religiously since then.

Painted internals of fuel cell?
 

i never heard of that? Is that a typo?

Mercury painted the inside of there CoolFuel fuel system.

I swear by Techron, as a kid i worked at a Volvo dealership in callas, My job was to drain fuel, leave about 5 gallons in it, pour in Techron and drive it hard. Worked 100% of the time and still does with my Nordic and Chaparral.

Most of these are half the cleaners as in the past years. The EPA made all the changes everything over the shelf is weak today for cleaners no question about it.. Examples of this is merc power tune was prob the best carb cleaner and best carbon cleaner one could ever use 12 years ago and back. Today it does nothing. Also Gumout carb cleaners in the 80 s and 90 s was a very strong carb cleaner as well. Currently it does not clean very well . Most professional shops including motorcycle shops went to ultra sonic cleaning parts and fuel system parts because not much is great in the way for cleaners.

The real way to lay up boats plus per all OEMs --- is with a remote gas tank with the soup mix and the run the boat until it is fully warmed up to recommended operating temps. In the winter time that can take 20 mins or even longer depending how cold it is. You need to run the engine long enough to warm up the oil and so forth.

I have been laying up boats since the 1980 s and since 1996 with the soup mix because Volvo Penta came out with that ( service bulletins ) way back then. Mercruiser followed suit years later. Plus merc over doses the 2 stroke motor oil way too much - it can foul out your spark plugs. I never have any issues with laying up boats this way.

In the past year over year we would winterized on an average 400 boats like clock work every year. . That's a lot of winterizations plus to find out what works or does not work . And of course those days are over for getting a ton of winterizations. In the last 6 years the average for winterizations is 30 to 35 per year if Im lucky. Just saying

Also it best to change all your oils with fresh oils for lay ups and DO FUEL SAMPLEs.and fuel samples at the filters ---- all of this just before you winterize for the lay up.

I have posted this info up here many years ago as well.