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I'm screwed....ughhh

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whealy22

whealy22

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Hey Guys! I took my boat out yesterday for her last run before winter. I only planned on getting some fun out of her and running some stabalizer. Of course life be as it may....10 minutes into the ride my port side engine started giving me a problem. I was doing about 50 mph and out of no where the rpms dipped on the port engine to around 3k and then nothing. It shut off. I tried to start it back up but it wasn't even turning over. Just making a buzz type sound. So i limped back into the launch and got it on my trailer...i thought maybe it was something stuck in the intake grate or impeller so i reached up into the intake grate...nothing. I then took off the impeller to see if there was something there i couldn't see...nothing. Impeller turns fine in my hand as well. Impeller and wear rings were just changed. FYI. So i then took the plugs out of the engine and tried to turn it over....just making a sound like it's trying to engage but no turning over. Also checked battery connection. Those were good. I'm fresh out of ideas. Thinking that it's possible a piston is broke, valve or something? Any ideas? Dealer is saying could take a couple of hours to find problem at 109 a hour...ughhh....any advice or help would be very very much appreciated! Thanks!
 
I thought of doing that after reading some posts on here. I'm not sure how to do that though...?
 
couple hrs, at the tune of $109.00...no way man..what idiots. You had the pump off already, which probably took 10 minutes, now, like SRUSH said, remove grey shield, with pump off, and turn PTO..if stuck....dont think its a starter...:(
 
there is a gray cover held on by some wing nuts near the drive shaft the flywheel is under there you undo the spark plugs and put the boots on the grounding lugs and turn the flywheel, it should spin freely and you can see the cylinders moving down inside the spark plug holes
 
Ok So just take off the pump and try to turn the drive shaft? That's the PTO right? If i can't turn the shaft then engine is seized?

Do you think if it's the starter the engine would just cut out like that at 50mph?
 
remove pump, then go inside engine bay, remove the grey shiel, thats behind the motor. You'll expose a "whitw wheel", thats the pto, now removethe spark plugs, thentry to turn the pto...if it turns, then your pump is seized, if the pto doesnt turn, then i'd say the motor is seized, but you can go ahead and remove the pipe, to get better access to the starter and remove it, then try turning the pto again..never know, maybe a tooth or two came apart from the bendix and lodged the flywheel...?
 
I did as you said. I removed the pump, and revomed grey sheild and took out plugs. I then tried to turn the PTO which is the white wheel. It wouldn't move. This should be turning easy if nothing was wrong right?

Now you said remove the pipe? What pipe? And where can i check to see if the bendix lodged the flywheel?

Thanks for the help so far....doesn't look good for me....but i'm willing to try anything!
 
Ok i just went back out and gave it all i had to turn it. It did turn maybe 15% of a rotation...i can move it back that same 15% but it seems to get stuck when i try to turn it anymore then 15%...i don't see a spot to get a wrench on there....Should the wheel need a wrench to turn after 15% rotation?
 
It can be a little tough to turn i can do it by putting a rag on it so the grease fitting dosent dig in my hand. But you can put a pipe wrench on the drive shaft to see if it will spin more
 
Ok i tried using a rag on the fitting and turning it but no go. I don't have a pipe....but i tried to start it again to see if that 15% that it moved before made a difference and it didn't turn. I then went to try and turn the PTO again and now i can't move it that 15% it seemed like letting it sit for a while it loosened up. So anyone have any ideas? If the engine seized would the pto move 15% originally. I'm not sure what to do now.....
 
not smart...

it could've have been just a broken piston, but now, with the force of a pipe wrench, could've crack the case on the inside, chipped/broke the sleeve, broke the rod, push the rod thru something...etc,etc..see what i'm get'n at.

The pipe, is the exhaust pipe, remove it, to make get'n to starter easier, then remove starter, or remove the front cover (mag cover), has about 12 little allen bolts securing it on, this will expose the flywheel, and ANY debris in there......hope you didnt f anything up, to bad.
 
I didn't use a pipe wrench. I only tried moving the shaft or PTO with my hands only. No extra force. I also tried starting it a few times...but that's all.

So at this point it probably a broken piston or something within the motor?

Should i even bother with taking the exhaust off and looking at the flywheel if the PTO isn't moving anyway?

I've never taken a motor apart and think that replacing something within the motor might be to technical for me to try. I don't want to **** up anything even worse. Unless there is a step by step instruction and replacing the piston is easy enough...

How can i find out for sure if the piston is the actual problem?
 
You will need to pull the head off the see if it's a piston.. There are a lot of reasons a piston can go bad.. Lean condition, broken ring or my favorite rod bearings!!! The needles fall apart and get into the engine causing a real mess. Last time I had a bad piston it was caused by bad rod bearings.. You might want to check www.sbtontheweb.com.. They have rebuilt engines that are fairly reasonable..
 
I read all 16 prior posts. Oh Man, sorry you had a problem on the last ride, but better now then the first trip out, of the season next year.
It sounds like the engine is seized up. Remove the head and give it a look. If the engine won't turn counter clockwise by hand with the spark plugs out, and the jet pump off, then it is seized. If the starter wet bad under power...@50mph , chances are it wouldn't effect anything as it only engages at start up. If the starter was going bad you would have experienced problems before it just dumped on the engine at speed. Remove the head bolts and be prepared for the worst. It sounds like the piston went loose and dropped pieces in the bottom end and jammed the crank. Pull the head off and then look to the oil injector cable for maybe a faulty cable, low injector oil or related problem. It could have sucked in water too from a crack inside the water jacket... Is there any metal pieces on the spark plugs? Are they white or tan? In any case it sounds like you got a winter project.

Karl
 
Removing the heads is not a big deal. Not like in a car. Just pop off a couple bolts, then a couple more.

If it is a piston problem, you will know it immediately after removing the head.

If piston issue, you will see pits in the top of the piston, possibly chunks of metal on top, or worse case, this...

From a wrist pin letting loose and chunks of piston getting slammed against the head.

This sounded like a CLUNK, though. Just an immediate freeze. No loss of rpms or anything. Running fine, then CLUNK!
 

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Thanks for the replies guys. I'm working a full day today so no time to tear off and look to see the piston. But i am planning on doing that tomorrow. I will report back as to what i find. Again thanks for all the replies!

If the piston did break and get lodged down into the engine...how hard is it to get all the peices out? Is it something i could do with not a lot of experience?
 
To answer your questions kustom karl...the spark plugs were tan in color and the oil in the boat is full. I'm using the seadoo full syn. in her. It could be a faulty cable for sure, which i can look at tomorrow...is the cable visible once the head comes off? I didn't have any prior issues with the starter, so it can't be that. I didn't see any metal peices on the plugs...no. I will double check on that tomorrow though. Where would i look to see if there is a crack in the water jacket?
 
whealy22 said:
Thanks for the replies guys. I'm working a full day today so no time to tear off and look to see the piston. But i am planning on doing that tomorrow. I will report back as to what i find. Again thanks for all the replies!

If the piston did break and get lodged down into the engine...how hard is it to get all the peices out? Is it something i could do with not a lot of experience?
Click to expand...

It's not hard to get the pieces out as you will be taking apart the engine completely.

Chester
 
Hey guys. Just an update. I haven't had a chance to open the head up. It's been raining here non stop. Should have a chance within a few days to take a look. I've been thinking though...If one piston broke...would i need a whole top end re-build kit with sleeves and everything? I was told if i rebuild one side...the other has to be done too?
 
depends on condition of the sleeve. If aint messed up, and just needs a hone, then you can throw back in there, same size piston, or even if boed out, you get rejet the one carb, to compensate..?
 
Ok. Finally had some OK weather come in so i took off the head. The sleeves and the pistons look to be in good condition. I found one peice of metal...tiny peice. One piston was a little nicked up. I'm assuming from the small metal peice i found on top of it. I'm not sure what to do now? seems like a connecting rod? Any ideas? I'm toying with the idea of taking the engine out and taking the bottom half off with a friend. Would i need to get into anything like timing after putting it back in?

Any information on what you guys think the problem is and taking the engine out and putting it back in would be really cool!! Let me know! Thanks for al the replies.
 
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