Just got it! Help! - Page 2 - PWC Forum: The best hang-out for Personal WaterCraft enthusiasts
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post #11 of 24 (permalink) Old 02-17-2012, 12:43 AM
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see the impeller forces water out the back of the ski through a small opening, the water is under very high pressure before it exits the nozzle. so instead of having a seperate water pump there is a fitting at the back of the jet drive that allows some of the water going out the back to be pushed through the engine and since there are no check valves in the system it will flow either way.
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post #12 of 24 (permalink) Old 02-17-2012, 02:04 AM
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threw this together with autodesk and paint hope it helps you understand how the jet drive cools the engine
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post #13 of 24 (permalink) Old 02-17-2012, 08:24 AM Thread Starter
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ok thanks for the help man I'm gonna try at look into this thing this weekend!! Hope its all good! It looks really clean on the inside I will try and get somme pics this weekend.
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post #14 of 24 (permalink) Old 02-17-2012, 09:27 AM Thread Starter
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How do you get the water back out so it doesnt freeze if it gets cold enough to freeze?
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post #15 of 24 (permalink) Old 02-17-2012, 09:33 AM
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we always start and run our skis for a minute. rev it up once or twice gets most of it out. or you could always pour anti-freeze into the engine with a funnel and a hose through the side of the hull where you hook the water hose. I would use rv anti-freeze
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post #16 of 24 (permalink) Old 02-18-2012, 06:47 PM
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I went up to Menard's and picked up the fittings, I need to get the hose now. A plastic 1/2" NPT with a 5/8" barb screws into the hole on the hull nicely. Then I got a female hose end with a 5/8" barb for the other end. Menard's does not cut the hose I want into smaller lengths so I need to go to Lowe's tomorrow because they do. I'll try and post a picture when I get everything together.
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post #17 of 24 (permalink) Old 02-18-2012, 07:30 PM Thread Starter
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yeah i got the fitting for the hull just forgot the end to hook it to the hose lol
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post #18 of 24 (permalink) Old 02-20-2012, 02:44 AM
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Welcome to the forum! Usually a couple revs of the motor with the hose connected dies the trick of getting most the water out.

1993 Yamaha WaveBlaster 701
1989 Yamaha WaveJammer 500
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post #19 of 24 (permalink) Old 02-21-2012, 03:12 PM
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Sounds like a quick way to blow up and engine that might still be good, I'd go buy the flush lit and do it right the first time. I Id' check fire first then compression then if all is good worry about fuel delivery. And first think is make sure plug wires are grounded before cranking over in case there are vapors or leaking fuel any where inside the hull or you find yourself picking yourself up off the ground after the explossion. If after cecking those thing work allright If you need any other answers Feel free to email me, I've been working on them since about 1988 Have ran into just about everything to do with them since then. Common sence goes a long way but experience also helps. (wabbit1211@yahoo.com) Also if you need any parts I have about 150 pwc's I'm parting out. Not many Tigersharks though, their just not popular in my area. About that grounding the plug wire I learn that the hard way, turning over an engine that had Hydrolocked with fuel leaking by stuck needles in the carbs. Had to make a quick trip to the E. R. after they chased me down and put out the fire on me.

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post #20 of 24 (permalink) Old 02-21-2012, 03:21 PM
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interesting how you can jump a wave with a jetski and not blow it up while in flight but you can't start it for SECONDS with out water hmm
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