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Discussion Starter #1
I have a 460 in my boat and would like to work on it while at home but dont have that thing that one connects a water hose to it to run water throught the engine. What will I have to get to do so and are there certain steps i gotta take on how to use it...please help. Oh and I dont have the headers that come out in the open.....i have the one that come out in the water, don't know if thats the right way to word it..........Thanks
 

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Boat Nut
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I don't understand why people like to run their boats out of water, but if you choose to... Disconnect the driveline to the jet pump, and regulate how much water pressure that you put to the motor. Have the water off, before starting the motor, and before turning off the motor. Best of luck.
 

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tintingsandiego
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I have a 460 in my boat and would like to work on it while at home but dont have that thing that one connects a water hose to it to run water throught the engine. What will I have to get to do so and are there certain steps i gotta take on how to use it...please help. Oh and I dont have the headers that come out in the open.....i have the one that come out in the water, don't know if thats the right way to word it..........Thanks
You could do a cheapo radiator flush kit from pep boys( Might ony be for garden and 5/8 hose) or make your own from home D in the pipe fitting section. I did the home D as they have a good selection for garden hose to pipe and then whatever size hose your running. They have the fitting that will attach to your garden hose to swivel for a easy install on the T.
 

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Discussion Starter #4
Can someone send me a pic of where to cut my hoses and connect the T and how to do it....and u guys suggest not to run the water till the boat is on and shut water off before i turn the boat off. Will i have to get some kind of water into the pump too while the boat is running out of the water...Thanks for the advise
 

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Not sure where to start...

Can someone send me a pic of where to cut my hoses and connect the T and how to do it....and u guys suggest not to run the water till the boat is on and shut water off before i turn the boat off. Will i have to get some kind of water into the pump too while the boat is running out of the water...Thanks for the advise
First, don't worry about running the water before, or after running the engine. You have "through the transom exhaust" and the water doesn't enter the exhaust until after the risers, so you're OK to turn on the water and wait until it runs out the back before starting. You can also let it run a few minutes after shut off to cool things down. As far as disconnecting the drive line. If its easy go ahead, but if it's like mine, you'll have to pull the engine, so try to keep the jet wet while running. OH, yeah, you DO want to rinse the road dirt and grime out of the pump before starting. Now, look at the water supply line coming FROM the pump to the engine. Split that hose, or pipe, and install some sort of connection that will allow the garden hose to hook to it. There should be a "gate valve" in the supply pipe/hose, make your cut after it, towards the engine. Install the "T" of your choice, close down the gate valve almost all the way so most of the water goes to the engine, with a trickle going into the pump and out the back/bottom... The rest will flow through the engine and out the exhaust tips on the transom. Once the water is flowing, start the engine, do your work, and shut it down... Cap off your "T", and OPEN THE GATE VALVE ALL THE WAY. Don't wait, do it right then, or you'll forget it and burn the engine down.... I build all this out of 1/2" pipe, using a pipe "T", and a hose bib, like the faucet on your hose. You can then connect to your garden hose using a short double female hose. The rest is the same as above. If you have a gazillion dollars in your pump disconnect it before running on the trailer. If it's a stocker like mine you should be OK, just rinse the grime out of it before you start. Any questions, PM or call me. Don't just guess, you can do a lot of damage to expensive parts if you screw it up...
Ray 805 300 0012

PS you might get some local help if you show WHERE you are under your screen name...
 

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Discussion Starter #7
Thanks MONEYPIT

Thanks a million Moneypit............very very helpful advise


First, don't worry about running the water before, or after running the engine. You have "through the transom exhaust" and the water doesn't enter the exhaust until after the risers, so you're OK to turn on the water and wait until it runs out the back before starting. You can also let it run a few minutes after shut off to cool things down. As far as disconnecting the drive line. If its easy go ahead, but if it's like mine, you'll have to pull the engine, so try to keep the jet wet while running. OH, yeah, you DO want to rinse the road dirt and grime out of the pump before starting. Now, look at the water supply line coming FROM the pump to the engine. Split that hose, or pipe, and install some sort of connection that will allow the garden hose to hook to it. There should be a "gate valve" in the supply pipe/hose, make your cut after it, towards the engine. Install the "T" of your choice, close down the gate valve almost all the way so most of the water goes to the engine, with a trickle going into the pump and out the back/bottom... The rest will flow through the engine and out the exhaust tips on the transom. Once the water is flowing, start the engine, do your work, and shut it down... Cap off your "T", and OPEN THE GATE VALVE ALL THE WAY. Don't wait, do it right then, or you'll forget it and burn the engine down.... I build all this out of 1/2" pipe, using a pipe "T", and a hose bib, like the faucet on your hose. You can then connect to your garden hose using a short double female hose. The rest is the same as above. If you have a gazillion dollars in your pump disconnect it before running on the trailer. If it's a stocker like mine you should be OK, just rinse the grime out of it before you start. Any questions, PM or call me. Don't just guess, you can do a lot of damage to expensive parts if you screw it up...
Ray 805 300 0012

PS you might get some local help if you show WHERE you are under your screen name...
 

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Discussion Starter #8
how to keep jet wet while running

How do I keep the jet wet while running..............should I just stick a hose into the jet or is there an easier or safer way to do it...thanks
 

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Above

How do I keep the jet wet while running..............should I just stick a hose into the jet or is there an easier or safer way to do it...thanks
If you re read the above notes, you'll see that a small amount of garden hose supplied water WILL go out towards the pump depending on how far open the gate valve is.... You can balance the water flow between the engine and the pump. This method is not perfect, but it does add water to the pump on the pressure side, not the intake side. That would take a hose stuck up from the grate. This is not intended to be used to run the motor all day, but long enough to make adjustments to carb and timing, look for leaks, (water/oil/gas), check gauges etc etc...
Ray
PS have you added any oil to the rear pump bushing yet?

Edit: The above method is for "through the transom" type exhaust ONLY.... "Over the top headers" require a different approach, and a lot of caution to prevent water flow into the engine from flooded headers....
 

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Discussion Starter #10
PS have you added any oil to the rear pump bushing yet?

How can I check if I need oil.....I just bought the boat about 2 months ago and dont know much about jet boats...




If you re read the above notes, you'll see that a small amount of garden hose supplied water WILL go out towards the pump depending on how far open the gate valve is.... You can balance the water flow between the engine and the pump. This method is not perfect, but it does add water to the pump on the pressure side, not the intake side. That would take a hose stuck up from the grate. This is not intended to be used to run the motor all day, but long enough to make adjustments to carb and timing, look for leaks, (water/oil/gas), check gauges etc etc...
Ray
PS have you added any oil to the rear pump bushing yet?

Edit: The above method is for "through the transom" type exhaust ONLY.... "Over the top headers" require a different approach, and a lot of caution to prevent water flow into the engine from flooded headers....
 

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The Man
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On the hard line coming from the pump inside the transom I installed a T fitting and put in a water faucet valve from the hardware store. I have a ball valve before the T so I can close it off and fill the engine, then open it and allow water to the pump if the driveline is still hooked up. I just use a washing machine hose with female ends on both ends so it'll connect to the water hose and the faucet valve.

 

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Fill 'er up

How can I check if I need oil.....I just bought the boat about 2 months ago and dont know much about jet boats...
Pull the two small plugs off the top of the bowl over the rear bushing. Fill one side slowly until it starts to overflow the other side.... Replace the plugs, and you're good for a while. How long depends on how loose the shaft to bushing clearance is and how fast the oil washes out. Once filled, it's a quick check to top it off before a weekend trip. The oil used is wide open to opinion, some use ATF, some use grease, and some, like me, us 90wt gear oil...
Ray
 

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Discussion Starter #13
Pic

Thanks for the pic Cordog

On the hard line coming from the pump inside the transom I installed a T fitting and put in a water faucet valve from the hardware store. I have a ball valve before the T so I can close it off and fill the engine, then open it and allow water to the pump if the driveline is still hooked up. I just use a washing machine hose with female ends on both ends so it'll connect to the water hose and the faucet valve.

 

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Discussion Starter #14
Thanks Ray

Pull the two small plugs off the top of the bowl over the rear bushing. Fill one side slowly until it starts to overflow the other side.... Replace the plugs, and you're good for a while. How long depends on how loose the shaft to bushing clearance is and how fast the oil washes out. Once filled, it's a quick check to top it off before a weekend trip. The oil used is wide open to opinion, some use ATF, some use grease, and some, like me, us 90wt gear oil...
Ray
 

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Discussion Starter #15
Valve ??

Ray....so the valve with the yellow handle is there so u can regulate the water flow to your jet? What will happen if there was no valve there and just a valve to control the flow of water from the water hose??? What is the purpose for that yellow valve and how does one know how much water to send to the jet pump and how much to the engine when regulating with a valve.........THANKS BUD


Thanks for the pic Cordog
 

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Split 80/20

Ray....so the valve with the yellow handle is there so u can regulate the water flow to your jet? What will happen if there was no valve there and just a valve to control the flow of water from the water hose??? What is the purpose for that yellow valve and how does one know how much water to send to the jet pump and how much to the engine when regulating with a valve.........THANKS BUD
Bud, it's usually about a 80/20 split, but that's pretty forgiving as long as the engine sees enough to keep the water flowing out the exhaust in the form of steam. The yellow valve is a "ball" valve, and they come in different ID sizes. Be sure to get a large enough internal passage, like at least 3/8ths, if not 1/2 inch... The "Gate" valve type also is somewhat of a restriction, but also has a larger opening when wide open which is where it should be while in use on the water... As long as you have water flowing out the bottom, and back when reved up, the jet should be fine. If you open the "main" valve the exhaust will dry up, and for a very short time you can hear the engine exhaust without the water which can mask a miss, or a hic up.... or a cylinder firing in the exhaust.... Water does not enter your exhaust until after the riser, so "flow back" isn't really an issue for most "wet log" applications....
Ray

PS you really do need that valve, or one like it, when running on the trailer. Otherwise you may not be able to keep enough water flowing to the engine....
 
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