Need Help with 09 RXP's

[murphsox]

Ok, long story short i do not know much about jet skis but here we go.

My ol' ladys cousin has two 2009 sea doo RXP 255's. He bought them at the end of last season. Both machines will not start. I dont think he winterized them and being that hes not the most mechanically inclined i fear he is in some trouble. I pulled the seat and stuff off and pulled the plugs off of machine A. I cranked over and a rusty looking fountain came out of all 3 cylinders, which also worried me. BUT it was turning over freely. I turned on the water from the hose and it started back filling into the most rear cylinder and coming out of the spark plug hole. If i put my finger over the hole it started to come out of the middle cylinder, and if i plugged the middle one it did not come out of the front cylinder. Is this bad because i have read mixed things on the internet about it back filling. Machine B had a dead battery so we couldnt start it, but we hooked up the hose and no water leaked into any of the cylinders with it off, which confused me further. he changed the oil in both machines already but will need to do them again. so should i get all water out of the cylinders in both machines, put a little gas in the cylinders, replace plugs, and try to fire then turn hose on? I wont get a chance to work on them again tuesday. I hope for his sake that its not headgaskets or a warped head or worse. Thanks you guys taking your time to read this and any help would be appreciated.

Murph

 

[red2blue]

wow

1 of those motors was sunk or at the very least...hydro-locked. When everything is working properly...start ski then turn on water....turn off water then turn off ski.

Now...how long was that ski sitting with water in the motor. Wonder what the crank bearings look like about now?

 

[Seadoobuddy]

Hi and welcome to the forum.
If the skis had water in the cylinders all winter .....that's not good news.

Like R2B said never turn on water until the motor is running. you must get all the water out ASAP. Get a good battery and start cranking with PLUGS OUT. If there is rust inside....I don't know what to tell you.....rebuild it I guess. Others will answer with better solutions.

Where in Michigan are you????? I once had a 1968 Rinkerbuilt

 

[murphsox]

Im in Port Huron, keep my boat in St. Clair! Also do some wakeboarding out on wolverine lake/walled lake.

Both machines were kept in the garage over winter and i think it might be a saving grace for his skis being that its somewhat climate controlled. I will leave the water off next time i see them and crank over until no water remains. ill see if we can get them running on that. If we cant then i may need a local expert to come look at them. Trucks i can work on, jet skis i cannot.

Murph

 

[Wenier]

Did he before winter do anything similar to what you have just done and put the hose on the skis without the engines running.

This is the most important thing about these skis. When the motor is not running the water jacket of the exhaust is not effectively sealed from the engine, this will lead to water ingestion in the motor resulting in possible damage being hydrolocking or sitting with water in the engine over a period of time.

You should always start the engine, then within 30secs the hose should be on and never run for longer than 5mins and take the hose off and give a few good revs to clear water out before shutting engine off.

I really hope the motors arent ruined.

 

[murphsox]

Well we got one of the machines running and i took a short video. quality is what you would expect from a cell phone. Now the other machine, put the key on and it does the beep beep. push the start button and all you can hear is CLICK. and nothing. the motor doesnt try to turn over at all. Also sounds like the fuel pump is priming when you push the stary button. Fuse? Relay? Starter? Hrmm.



Murph

 

[murphsox]

Well we got one of the machines running and i took a short video. quality is what you would expect from a cell phone. Now the other machine, put the key on and it does the beep beep. push the start button and all you can hear is CLICK. and nothing. the motor doesnt try to turn over at all. Also sounds like the fuel pump is priming when you push the stary button. Fuse? Relay? Starter? Hrmm.



Murph

 

[murphsox]

well we got one machine running, machine B wont do anything, push the button to start and just a click, sounds like the starter relay. I can also hear the fuel pump while while its priming the system but it does nothing after that. Bad starter? the oil on B is clean, no water in the oil or in the cylinders.

 

[joshpxj]

Is the click the starter trying to engage? Or simply a relay click? Hopefully it's not locked up.

 

[murphsox]

Well how would i tell if the starters locked up. It to me sounds like the relay clicking. If it is locked up, replace it?

 

[murphsox]

Bump it to the top for help

 

[joshpxj]

Relay will be a light click. If the starter is hitting the flywheel trying to turn a locked up motor it will be a fairly loud heavy click. Check all power and ground connections first for loose/corroded connections. If all is good see if you are getting power out of the relay. If so I would pull the starter next and inspect it for rust or corrosion internally that may be causing it to be inop.

 

[BMANN06]

Can someone go over the exhaust manifold on the 4Tecs and explain to me how water can get into cylinder head?? I'm right confused on this as it appears with exhaust manifold off that there is a "water in" and "water out" line with the "water out" line just going into water box. I just don't see anyway of water getting into to cylinderhead from hose.

Thanks a ton!

 

[Michael211_2000]

Water is injected directly into the exhaust manifold, it's not "jacketed" (my '06 RXT isn't jacketed at any rate, I've had it off and looked inside it and the water lines go right into the exhaust chamber). Exhaust gasses push the water out of the manifold and down into the water box and out the exhaust port in the stern. If you're running water into the cooling system while the engine isn't running you are rapidly filling up the exhaust manifold and water will start to flow into whichever cylinders have open exhaust valves. The rest is $$$$$ history.


Murph, take a large screwdriver and arc across the 2 posts on the starter relay... if nothing happens except a spark, then either the engine is seriously locked up or the starter is bad. If however the starter engages then all you need is a new relay (~$20 off Ebay for a new one last I checked).

If you haven't already on the one you got to run, CHANGE THE OIL AND FILTER ASAP! Water in the cylinders slowly seeps down thru the rings and into the crankcase. Your oil is crap after that. Always Always Always start the engine BEFORE starting the waterflow, then turn OFF the WATERFLOW BEFORE turning off the engine! Never let water flow while the engine is not running, that's bad mojo man! Look up the correct procedures for changing oil in a 4TEC engine it's not a simple affair. When refilling with oil only fill to the middle of the bend in the dip-stick, NOT to the top of the bend and NOT below the bend but right in the middle of the bend is full.

- Michael

 

[murphsox]

Ok i will check the starter by arc-ing and go from there. Thanks for the help ill report back!