Super Jet superjet wont start

[colper]

95 Superjet with 701. I was at Daytona, first time in salt water, at the end of the last day it wouldn't start again. Picture of plugs and cylinder are below. Engine will only turn over if plugs are out. Its not the battery, checked that. Starter? Electrical? The positive battery terminal smoked a little when it wouldn't turn over.

 

[QJS]

95 Superjet with 701. I was at Daytona, first time in salt water, at the end of the last day it wouldn't start again. Picture of plugs and cylinder are below. Engine will only turn over if plugs are out. Its not the battery, checked that. Starter? Electrical? The positive battery terminal smoked a little when it wouldn't turn over.

Likely cause of the positive smoking is either a poor battery connection ( I assume you have checked this is ok) or too much current drain from the starter, which is why it won't turn over under load with the plugs fitted. Or the battery positive itself has gone high resistance.


Chris

 

[colper]

how would you fix too much current drain from the starter?

 

[QJS]

how would you fix too much current drain from the starter?View attachment 143514View attachment 143513

Oh dear nasty looking plugs. Take both plugs out and try and turn the engine with your hand on the drive coupler, it should turn fairly easy. As for the 2nd pic is that the top of your piston we can see ???
Chris

 

[colper]

it turns freely, already checked that. Yes that is the top of the piston. It has white blotchy spots on it. not sure if this is affecting it not turning over.

 

[QJS]

how would you fix too much current drain from the starter?]

You could try changing the brushes in the starter motor, chances are however the rest of it is worn out so will need replacing. Try changing the battery cable first as this is the cheaper option.
Chris

 

[Rickster]

Those plugs do not look good... are those salt crystals or saltwater sludge I see on the electrode to the right???

I would assume you got water in the engine and it's partially hydrolocked, and get that thing running ASAP...

Good luck

 

[QJS]

Those plugs do not look good... are those salt crystals or saltwater sludge I see on the electrode to the right???

I would assume you got water in the engine and it's partially hydrolocked, and get that thing running ASAP...

Good luck

This is a possibility but I would have though he would have already noticed that if it were the case as he says it will turn over with the plugs out.
Chris

 

[Rickster]

This is a possibility but I would have though he would have already noticed that if it were the case as he says it will turn over with the plugs out.
Chris

Without better pics, it a guessing game, but that sure looks like saltwater sludge to me... If that is the case, then he has a week of saltwater in the bottom of his cases, which means crank is probably gone...

It makes sense that an engine would turn over slowly with water in it, but turn over normally if the plugs are out...

Hopefully I'm wrong...

 

[colper]

it doesn't turn over at all with plugs in it, would that still be an indicator of saltwater being in there. seems like water would just slow down a turn over, not completely stop it?

 

[Rickster]

it doesn't turn over at all with plugs in it, would that still be an indicator of saltwater being in there. seems like water would just slow down a turn over, not completely stop it?

If you have enough water in the bottom, then yes, hydrolocking an engine will make it stop turning over...

Turn the ski over sideways on the exhaust side, keep both pugs out, and turn in over... If water comes shooting out, then I would take the engine apart and pickle the parts ASAP.

 

[Rgerb]

If you have enough water in the bottom, then yes, hydrolocking an engine will make it stop turning over...

Turn the ski over sideways on the exhaust side, keep both pugs out, and turn in over... If water comes shooting out, then I would take the engine apart and pickle the parts ASAP.

We already did this and nothing came out at all...
The starter is black which makes me think that it may have been replaced. is there a way of ruling out that the starter is bad?

 

[Rickster]

We already did this and nothing came out at all...
The starter is black which makes me think that it may have been replaced. is there a way of ruling out that the starter is bad?

Take the starter out, ground a jump pack to the body of the starter, and touch the positive cable to the post positive post on the starter, this will spin the starter, but obviously not under load.

Have you taken the front plate off to see if the bendix if working and not come apart?

 

[colper]

well, I took the starter off and it looks like it is fried (rusty and corroded). Probably the reason it wouldn't turn over. Looks like there is salt on the pistons, must be a leak somewhere? Should I take the head and cylinder off to get a better look at the cases and crank? or is there a better way to do this?

 

[FlightPlanDan]

If you don't have a starter sitting on a shelf to put in there, It would be a good idea to protect the pistons/cylinder from further damage. You've got a bit of work ahead of you to save the motor.
If you have to wait on shipping for a starter, I'd fill the motor with 2 cycle oil while you wait.

Upon receipt of the starter, you will have to drain the motor (best you can). Either flip the whole ski over, or pull the motor.

I'd suggest pulling the motor. Installing a starter is much easier, and you can drain it better. (turn the crank slowly while draining)
Get a bud to help. It's not a one man thing.

BTW: water does not compress. Your pics and decription look/sound like you ingested water for sure. Act quickly. You could waste the motor. (even if the starter is bad, it could be the least of your problems)

 

[Rickster]

You are now 10 days since you have ridden it, and there is salt water in the motor... I would break the engine down ASAP and inspect the crank! Hopefully you only have a blown head gasket/o-ring and the bottom end is untouched.

If there is water in the cases, then pickle the crank ASAP (immerse in oil)... Outboard drive oil is great for water retention (absorbing water) but is a bit pricey.

You neeed to get that engine out and broken down ASAP or you will be in for a complete re-build...

Rick

 

[colper]

I took the head off and reeds out, there was no water or deposits in the cases around the crank. Just some salt crystals on the top of the pistons, water probably came in from the carb. Must just be a starter problem.