Running two strokes in in cold water

[Baja 252]

For the cold weather riders, what all do you do to your skis to ride in water that's in the 30* - 50* range?
What's the best way to restrict the cooling water to get and keep the engine up to temp, less inlet water or just restrict the outlets?
I have always restricted the outlets to hold the water in the engine longer, but maybe that's wrong?

 

[RiverRides]

I choke the outlet side, just make sure all your water fittings are tight so you don't blow a line bc of the increased pressure.

 

[waxhead]

Don't worry. it will make more power when its colder

 

[Roseand]

Just make sure you take your time warming it up in the water.

 

[loictahiti]

Why doing that ? Ok sorry

 

[bird]

I ride year round here in Wisconsin. You're over thinking it. Just warm it up like you would normally and enjoy the free horsepower.

I've never done anything to restrict water to the engine. Ran outboard 2 strokes all winter without issues. They do have thermostats unlike our skis.

 

[badvinny]

In Canada here when it's near freezing my Dasa motor wasn't even warming up the pisser water. I ended up teeing 2 of the 4 pisser together and then I have a tiny ball valve on that line that I can throttle down or close completely if needed.

 

[SUPERJET-113]

When I lived in Nebraska I would do the same thing you mention. I would put home made brass with 3mm hole restrictors and clamp them in the pisser line right before its exits the ski. Also, yes, pre-warm the ski up real good, cold seizures are a real thing..lol

 

[bird]

In Canada here when it's near freezing my Dasa motor wasn't even warming up the pisser water. I ended up teeing 2 of the 4 pisser together and then I have a tiny ball valve on that line that I can throttle down or close completely if needed.

How many pissers and pump pickups were/are you running?

Water doesn't conduct heat very well, so it would be hard to tell with cold water and that many pissers flowing. Did you check the engine temps or just the water temps?

 

[Baja 252]

Thanks for the feedback. We run water up the pole and onto the grips, that is a restriction in itself and then we restrict the other pisser. We check temps with a heat gun on cylinders, head, pipe, water box and adjust if necessary. I was just wondering if anyone did something different.

 

[badvinny]

How many pissers and pump pickups were/are you running?

Water doesn't conduct heat very well, so it would be hard to tell with cold water and that many pissers flowing. Did you check the engine temps or just the water temps?

4 pissers in total, 2 I can block off with the valve. I just check the temp with my hand while riding, don't go fast until it's warm.

 

[Quinc]

Thanks for the feedback. We run water up the pole and onto the grips, that is a restriction in itself and then we restrict the other pisser. We check temps with a heat gun on cylinders, head, pipe, water box and adjust if necessary. I was just wondering if anyone did something different.

On a hot summer day running the 701 at WOT in a jetmate the cylinders are only around 110-120ish degrees. But after stopping they shoot up to 140-150. So figure when running the temps are much lower vs after you take off the hood to check.

 

[kevbo]

Make sure to set the carbs richer as the air temps dip. Higher combustion temps cause more problems than a little cooler water.

 

[waxhead]

run your pipe hot and your motor cold. enjoy the free power gain. But as kevbo said you may need to richen up a little

 

[ridetrp]

I ride year round here in Wisconsin. You're over thinking it. Just warm it up like you would normally and enjoy the free horsepower.

I've never done anything to restrict water to the engine. Ran outboard 2 strokes all winter without issues. They do have thermostats unlike our skis.

You’re riding right now?


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[bird]

You’re riding right now?


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Gonna be 37 next week. I was riding in December multiple times.