In water Winter operation - precautions

[Srex0101]

North East salt water operation, why? Winter scuba diving
Aside from leaving the engines (twin 2002 4st 225's)
Down to prevent freezing in the jackets and tubing, are there
Any other recommendations, ie 5w30? 10w30?

[bumperfood]

Because I don't get out to often in the winter and trailer my boat, I just make sure that I always have fuel preservative and stabilizer in my tanks. As my area does not experience the bitter cold of the East Coast, I don't have too much concern over any water in my fuel freezing in my filters, lines, or carburetors. I should think a water separator may be in order for your side of the continent.

[BQUICK]

Under 40 degrees my old 1989 200s don't even want to fire up. Crank forever and nothing.......acts like no ignition/spark.

[robert graham]

I've run my Yamaha 90HP in sub-freezing temperatures and the motor started and ran just like always...My lugnuts were freezing off but the motor acted like it couldn't tell the difference!

[BQUICK]

Is that 90 fuel injected Robert?

[robert graham]

Is that 90 fuel injected Robert?

Naw, mine's an old carbed, premix, 2 stroke....I don't think it cares much about the weather or temperature...seems to run good at 25degrees or 95 degrees! Maybe some of the new sophisticated, 4strokes are more sensitive to weather conditions?...Think I'll just keep my 90C, until it dies anyway!

[BQUICK]

That's interesting....both of mine hate the cold....I wonder whay? Even at 45 deg thay will fire but need to keep hitting the choke to keep them alive. Wasn't as bad before the ethanol gas. Maybe a bit lean....or my carbs need cleaning. But...both motors act the same. I just thought it was the nature of them...

[robert graham]

That's interesting....both of mine hate the cold....I wonder whay? Even at 45 deg thay will fire but need to keep hitting the choke to keep them alive. Wasn't as bad before the ethanol gas. Maybe a bit lean....or my carbs need cleaning. But...both motors act the same. I just thought it was the nature of them...

My motor has that prime start enrichening device on the middle carb. Maybe the manual chokes on yours requires a bit more "operator input", but whatever it takes to make it go?