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milky rave valve and starting issue

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gsxl kid

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hey guys i finally got my starter replaced, and carbs rebuilt, ski runs alot better now,

2 issues

i went out today and the ski ran great for the most part... when i came back in and went to flush out the ski pressing the start button would not do a thing, however if i bypassed the solenoid with a screwdriver it would crank but no start... or spark. where do i start with this.. eventually the starter button worked and the ski started but seems as if the problem is intermittent.

2nd

i decided to clean out the rave valves as it looks as if they were never apart. i pulled out the mag side rave and it was all milky and goopy as if there was water in there, the pto side was just all gummed up.. cleaned them up but im not sure what is causing this and where do i go from here to check.
 
gsxl kid said:
hey guys i finally got my starter replaced, and carbs rebuilt, ski runs alot better now,

2 issues

i went out today and the ski ran great for the most part... when i came back in and went to flush out the ski pressing the start button would not do a thing, however if i bypassed the solenoid with a screwdriver it would crank but no start... or spark. where do i start with this.. eventually the starter button worked and the ski started but seems as if the problem is intermittent.

2nd

i decided to clean out the rave valves as it looks as if they were never apart. i pulled out the mag side rave and it was all milky and goopy as if there was water in there, the pto side was just all gummed up.. cleaned them up but im not sure what is causing this and where do i go from here to check.
Click to expand...

let's start with did you have the hose turned on when you were trying to start the engine and possibly got water in the cylinder to cause the rave to be milky?
 
no i know not to turn the hose on untill the ski is running and to shut the hose off first then kill the engine, but previous owner did not know this... ive been out a few times since the previous owner had the ski
 
with the intermittent start problem, I would check and clean all the ground wires and battery connections, take the boots off the plug wires and cut the wires back 1/4 inch and reinstall the boots with zip ties, you may not be getting good spark from the wires. if still a problem test the start button with a meter.

do a compression test, if you didn't get water in the engine from the hose maybe a cracked block
 
i cant even check for spark at this point... the start stop button does nothing when i press it with the dess key in.. guages light up i get 2 short beeps but nothing after that... only way it will crank is if i jump the solenoid.. im pretty sure you wont get spark by just jumping the solenoid to engage the starter...
 
- check your wire connections
- take your battery to have it load tested
- you don't need spark for a compression test, you do it with the plugs out and the plug wires on the grounding studs. sounds like you can jump the solenoid to do the compression test.
 
ohh i know i can do the compression test without spark ive done it plenty of times infact ive done it on the ski when i first got it. battery checks out good on a load ill do another compression test now. i checked all connections at mpem and put some dielectric grease in there
 
i checked wire connections at mpem and put in some dielectric grease, battery load tested ok, battery is new as of 2 months ago. i know that i dont need spark for a compression test ive done it before and ive done it on this ski when i bought it.. numbers seemed normal but ill check again right now ill jump the solenoid for the test.
how do i go about testing the start stop switch and or mpem
 
you'll have to get access to the wires to the start button and do a resistance test with your multimeter set on Ohms. should be infinite resistance across the 2 wires when button not pressed and no resistance when button pressed. i guess you could just short the wires together to see if the engine cranks too. sorry, but can't tell you how to test mpem. there are threads on it. could start by checking your fuses.
 
gsxl kid said:
143 psi on the mag side 135 on the pto side
Click to expand...

well compression is not bad. were you implying when you siad that the PO did not know to start the ski before starting the hose that you think he did flood it? If you've only had it a short time and ran it a couple times, don't know if him flooding it could still cause the rave to look milky. Unless one of the experts says otherwise, I would clean the raves, get it running and keep a close eye on it. Maybe even pull the cylinder head off and take a look. if you do that make sure you check the manual for the proper torquing sequence.
 
ill ohm out the wires one night this week.. thanks on that one. yea i know for a fact that he turned the water on first then started it then shut it then turned water off. how long water was running while ski was not is unknown but when he started it for me before i purchaced it this is what he did. its possible that he did flood it... next time i get it running i will check the rave valves again. i just cleaned them up
 
gsxl kid said:
i checked wire connections at mpem and put in some dielectric grease, battery load tested ok, battery is new as of 2 months ago. i know that i dont need spark for a compression test ive done it before and ive done it on this ski when i bought it.. numbers seemed normal but ill check again right now ill jump the solenoid for the test.
how do i go about testing the start stop switch and or mpem
Click to expand...

rereading-
-did you check the ground wire from the battery to the engine block? those corrode and are often the problem.
-when you say you crank by shorting the solenoid with a screwdriver but don't get spark, how did you test for spark? have you tried trimming back the plug wires yet?

I'll ask the Doc to take a look at the thread. I'm not sure if you should get spark by jumping the solenoid or not. He would be able to say if the mpem or maybe the coil might be the bad.
 
i did not check the ground wire yet.. i checked for spark by pulling a plug attatching the wire to it and grounding it out on the block or grounding plate... besides i can tell its not getting spark because the plugs are wet too... i know i have fuel and compression.

on another note i do want to thank you for all your help so far... ive done my fair shair of mechanical work but im a little new to the 2 stroke and jetskis
 
pics of the rave valves and the milky port
107.jpg

108.jpg

109.jpg
 
it sure looks like water is getting in that cylinder, I'd unbolt the cylinder head cover and take a look
 
Hi Guys,

Sorry for the late reply. I've been hung up the last few days.

OK.....


1) If you have the lanyard on, and you got 2 beeps... you will have spark if you jump the solenoid.

2) His head should come off to look for damage... but it has a real head gasket. (not reusable)

3) You are getting water into that engine... but only a little. It could just be condensation from water in the exhaust.


I would open the wires at the MPEM, and check them there to see if the start/stop switch is working.
 
ok.... got home from work a little early, update 1

cut back plug wires and re set them in the boots.. still no spark, checked and cleaned all grounds... still no spark (bypassing starter button because it still dont work.. exposed wires for start button 12 inches down the harness, touched them together and she fired right up... now time to get a new switch!

im pulling the head off now and going to check into that
 
upon removal of the head i did not notice anything out of the ordinary ill post pics, where is it possible for water to get into this engine and how do i go about testing this?
 
Last edited by a moderator:
did it look like the head had been removed previously (e.g. paint scraped off the heads of the bolts)? I'm wondering if previous owner maybe removed head for some reason but did not replace the gasket. post some pics, maybe Doc will see something but the important is you didn't find a cracked head. maybe just condensation as Doc said previously
 
head was never off i was the first to scrape the paint off the bolts and nuts in order to get the sockets on.. same goes for the rave valves. it appears as if the exhaust manifold has been off in the past... gotta check on the service records
 
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