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3d exhaust meltdown

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guys i have cleaned out the exhaust and put it back together and put new exhaust outlet on

when i try to start the ski i can hear the starter but the engine won't turn over i was thinking water flooded engine and ran procedure in the manual but nothing

any ideas?

Declan
 
Oh man, I feel for ya man... I'm probably a few steps behind you, so I'm curious as to what people more knowledgable than me say about this. I don't have any melted pipes, but my hull smells of exhaust and I'm thinking i might have to clean out the exhaust manifold. I cleaned out the back section of exhaust and found nothing, so i'm thinking this could be bad. I lose all power a little above idle after riding for an hour or so. I'm just as lost as you man. Good luck!
 
declan it sounds like your starter bendix isnt working

Starter Bendix? Starter Motor?????

just an update took the spark plus out a couple of times and cleaned got nothing

i switched the plugs around and i got it to start yipeee! (i thought)

switched it off and tried again to start same again try's to start then nothing ,

Going to get 2 new spark plugs tomorrow and try again
 
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when you said you could just hear starter i thought it wasnt engaging the engine thats why i thought starter bendix
 
update

Guys i changed spark plugs and started first time

tried again but died turns out it was flooded with fuel proceeded with the method in the owners manual to flush fuel and bingo sorted,

ran and flushed ski for ten minutes....

will update after take out on the waves

@3d, as seadoosnipe mentioned previously there are calibrated fittings on the exhaust that cool the engine

i found my blockage at the very bottom calibrated fitting which had a black pipe leading to a t-piece that was connected to the water intake from the back

I had to removed the whole exhaust to get at the fitting

also make sure that the exhaust bellow is connected properly part 37
 
Had the exact same problem. Replaced all the melted components with parts made at a local muffler shop. Had to have holes welded closed in the threaded tube (item 5). I removed all the resonators during the process. I noticed the ski is a touch louder, but nothing to write home about.

I'm really upset that I paid good money for those useless resonators for the system to eventually fail. I'm a designer myself, and all the companies I work for use the KISS method: Keep It Simple Stupid. Total in repairs for this "meltdown" approx $350 USD.
 
New to the Forum, and glad I joined.

Took my first ride on my new to me '05 3D RDI on Fathers Day..and was out for 15 mins, just about to start working the ocean break waves when the engine choked and died. It took me over an hour to get back to the beach with the lid off the ski, and only working a few seconds at a time. When I finally got the rear deck off, the T fitting was melted, but the rest of the piping looks ok. I have the part on order, So 5 to 10 days for a 14 dollar plastic part, stupidly will keep me out of the water in prime season here in the notheast.. But more importantly, where do I start? Check the calibrated fittings first then what? Should I pull the head and pipe to check them all? And about how long does this take?And how do you stop this from happening again without any warning? Any ideas? This will really suck if this happens next weekend after I pull everything apart to clear a couple of grains of sand.
 
New to the Forum, and glad I joined.

Took my first ride on my new to me '05 3D RDI on Fathers Day..and was out for 15 mins, just about to start working the ocean break waves when the engine choked and died. It took me over an hour to get back to the beach with the lid off the ski, and only working a few seconds at a time. When I finally got the rear deck off, the T fitting was melted, but the rest of the piping looks ok. I have the part on order, So 5 to 10 days for a 14 dollar plastic part, stupidly will keep me out of the water in prime season here in the notheast.. But more importantly, where do I start? Check the calibrated fittings first then what? Should I pull the head and pipe to check them all? And about how long does this take?And how do you stop this from happening again without any warning? Any ideas? This will really suck if this happens next weekend after I pull everything apart to clear a couple of grains of sand.

I'd be careful out on the open sea....anything gets into the exhaust it will block flow and cause either the engine to be choked out or will continue to flow at really high temps causing a meltdown. I've heard of people changing out the lower half of the exhaust (removing resonators) and inserting aluminum pipes in their place. you will get louder, but less chance of a meltdown
 
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