Last year i winterized my 502 MPI by filling a five gallon bucket with rv antifreeze and having the muf on the drive, and sticking a hose from the muff into the bucket to suck it up. It didn't do it real fast, took about a minute to suck up the five gallons. Anyone see a problem with this, or will i overheat the engine doing this?

I use a bilge pump hooked to the muff.

i did that with my jetski last fall, worked good, but the jetski can't suck the water up like the boat can

I do the same thing but put a 5 gallon holding tank (with a valve) on top of the swim platform so gravity makes the anti-freeze drain fast into the muff. I then sample the color of the exhaust to be sure it is colored adequately from the dye.

...use the muf,put a 4' piece of garden hose on(mufs) put a funel in hose (you need two people) pour rv anti in then start motor run at least 2 gals in! should be good to go!

i think it took me 4-5 gallons last year to fill up the big block...

same way we have done it for years. 5-6 gallons in a big bucket with a garden hose down to the muffs. start engine on water to warm up, then shut down, switch to the bucket ( sitting on the swim platform), and run the entire bucket through.

Yes, warm it up and then use the bilge pump. Takes 4-5 gallons and fills quick. Easy contraption to make.

Sometimes if it sucks it slowly, It might be time for a sea pump.

since 1994... I took a 5 gallon bucket and made a garden hose fitting at the bottom. Use a 4-5 ft hose to run down to the muffs like everyone says.....never had a problem.