VST Pump Chamber Winterization

[John from Madison CT]

RodBolt and Ray: This is for you guys.<br /><br />Should the VST pump chamber be full or empty during winterization? It's easy to empty, but wondered if there is any advantage to leaving it that way?<br /><br />Also, I have concerns about refilling it with just the primer bulb. Wouldn't pumping it full put only gas in the chamber and no oil? The way I understand it, the engine must run to get oil to mix with the gas in the VST chamber.

 

[rodbolt]

Re: VST Pump Chamber Winterization

I just treat the fuel and leave it in. I have seen them go bad more sitting dry than wet.<br /> I know yamaha says to drain them but the past 7 years has taught me otherwise.

 

[WillyBWright]

Re: VST Pump Chamber Winterization

IMHO. If it ain't in there, it can't go bad.

 

[bigbrownbuku]

Re: VST Pump Chamber Winterization

currently i have come acroos 2 schools of thought. full or empty? pros and cons for both.<br />i would also go with treated full.

 

[rodbolt]

Re: VST Pump Chamber Winterization

willy<br /> the problem is when the tankis empty the pump tends to corrode. it also holds a small amount of fuel that wont drain due to internal check valves. with carbs I use the "if it aint there it cant go bad method" with the VST I have found less problems with leaving it full and treated than empty.<br /> just an observation. but with pumps at 750 or so I try not to let them Die .