Engine full of water!!!

[x2ryder]

I had a pulse line fitting fall out of my crankcase yesterday on my Superjet. So I had to be towed in about a mile yesterday. Today after getting it all fixed I pulled the plugs and the motor was full of water. Do you think it came through the hole on the crankcase where the pulse fitting was? Or does towing allow water to come back though the exhaust somehow?

 

[DAG]

??? did you toe it backwards?

 

[Matt_E]

No, it came through your water supply lines. This happens when towing too long & too fast
How fast did you get towed, and for how long?

Whenever you get towed, pinch off or pull off your water supply line(s).
If you cannot do that, tow slower than 7mph or so.
The speed forces water through the pump up into the cooling lines, into the exhaust, and ultimately into your engine.
A running engine would force it out with exhaust pressure, but a stopped engine will not.
This is why you have to turn on the engine on first before the water hose when running it on the hose.

 

[x2ryder]

Thanks Matt

 

[DAG]

ok, so no more towing my ski.... o_0

so when you tow, you let the bay fill up? and pump it out later? what about the carbs taking in water? risk the pump to overheat and pump and tow on the go?

 

[Matt_E]

??? What are you talking about?

You're talking about bilgepumps. They have nothing to do with cooling lines.

I am talking about the jetpump

When I get towed, I make sure it's <5mph.
And my bilge pumps are going the entire time.

 

[DAG]

i was meaning to say what do you do once the lines are pulled,, water is still gonna be dumped into the ski.. and i was worried about it filling up and then water falling through the carbs..

i'm assuming your not taking off your rideplate and pulling the lines at the pumpr, but instead on the engine side..


but how often you have a screw driver with you when you need a tow?

 

[Mouthfulloflake]

if you you prethink the scenario, inside the hull, you can have a non-tightended zip tie on the line, and make sure the line is a few inches too long, and double the cooling line on itself and pull the zip tie tight.

OR stick a small valve in the line.

i was meaning to say what do you do once the lines are pulled,, water is still gonna be dumped into the ski.. and i was worried about it filling up and then water falling through the carbs..

i'm assuming your not taking off your rideplate and pulling the lines at the pumpr, but instead on the engine side..


but how often you have a screw driver with you when you need a tow?

 

[Matt_E]

Or you could just town @ <5mph and not worry about it.

 

[nikad58]

??? What are you talking about?

You're talking about bilgepumps. They have nothing to do with cooling lines.

I am talking about the jetpump

When I get towed, I make sure it's <5mph.
And my bilge pumps are going the entire time.

I have never towed my skis !!:bigeyes::bigeyes:

 

[oxnard111]

We tow all the time... sometimes you loose your ski in the surf, and it just won't start again. It would be hell towing <5mph for 3+ miles. So we just spit that stuff out when when we get back to the harbor, and fire 'er up. Just ask Andrew... hehe

 

[Matt_E]

As long as you can get'er running right away, it's all good. :biggthumpup:

 

[ANT]

I was towed in yesterday and was moving about 20 mph for about 5-10 minutes from the surf and i didnt get any water in motor so i dunno if i buy that whole cooling line deal.

 

[Matt_E]

You don't have to buy it, it's fact. :biggthumpup:

Seriously, it depends on your impeller, impeller position, and cooling setup.

There is no difference between your pump moving water through it and the cooling system under its own power or via forced water through it via towing.

It doesn't happen every time, it doesn't happen the same on every boat.
But it does happen.

 

[nikad58]

Honestly Teresa's blaster broke in the middle of Lake Isabella.. i rode back and got a tie down when i got back some guy on a SX 650 was with her and we started talking.. and then started towing her back and he got racey.. I towed her back at about 45 MPH for a good mile on my big bore square.. lol I blew that guy off on the SX towing a blaster !! anyways.. tightined down the Kehines and bang started right up (no water)

but... I can se it filling up sometimes

 

[tor*p*do]

It also depends on where the engine is in the two cycle process.
You may tow one time and the engine is in a position with closed off/cross ports and it is fine.
The next time with ports cross venting, it fills with water
I have a small pair of vise grips and a thick piece of rubber in the tool pouch to pich off the supply line if needed:cool2:

 

[ANT]

You don't have to buy it, it's fact. :biggthumpup:

Seriously, it depends on your impeller, impeller position, and cooling setup.

There is no difference between your pump moving water through it and the cooling system under its own power or via forced water through it via towing.

It doesn't happen every time, it doesn't happen the same on every boat.
But it does happen.

theres not that much water moving through your pump that its going to force it through the cooling lines. the pump has to be forcing water through the pump for it to do it that bad. I have daul cooling and a 12/17 w tbm cone and i didnt have any trouble the yesterday.

 

[DAG]

i'v sank my ski enoulf to not use zip ties on teh cooling anymore.. i'm strictly clamps from now on. I dont plan on having my ski towed, but would it be a good idea to clamp on a on/off water valve to each of the lines?? just incase...

or would the risk of one of them antecedently being closed and overheating the ski be the bigger of the two worries?

 

[Matt_E]

theres not that much water moving through your pump that its going to force it through the cooling lines. the pump has to be forcing water through the pump for it to do it that bad. I have daul cooling and a 12/17 w tbm cone and i didnt have any trouble the yesterday.

Yamaha OEM Manual says I'm right. :biggthumpup:

 

[ANT]

my motor says it wrong lol