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Premium Member
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popoff or ratchet pros and cons....also i've seen a few different ideas on how to release water in case of engine failure...any pics
 

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Horsepower sells Engines
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ok i read the hole thread when is some one going to need to run one at what speed is some one going to need it? is this only with a loader? what variables is there to deciding if you need one. like the last guy on the other form im running a three point at what point do i say its worth it. im not racing it just every day boat
 

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oldsmopile equipped
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702 Posts
ok i read the hole thread when is some one going to need to run one at what speed is some one going to need it? is this only with a loader? what variables is there to deciding if you need one. like the last guy on the other form im running a three point at what point do i say its worth it. im not racing it just every day boat

you dont need one, spend your money on speedy parts.
 

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Horsepower sells Engines
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im planing on it. but at what point with what parts am i going to need a ratchet
 

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E-7 Sheepdog (ret)
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im planing on it. but at what point with what parts am i going to need a ratchet
Whern you race, class rules will stipulate when one is required.

They function totally differently, do the same thing, 2 totally separate ways, and can be used together.

'Loader or not" is a pointless question, as you will only go so fast without a loader to keep your intake pressures even top-to-bottom. Top impeller pressure drops as you go faster, reach close to "0 psi", and you get cavitation, a bad thing. Water is heavy, and hates to change direction. When "scooped up" in an intake, it will try to stay near the bottom, A loader does not so much "load the intake", like a scoop, that's the shoe's job. It keeps water near the front of the intake traveling upwards near the front, to reach the top of the impeller, instead of just letting it all try to feed the bottom.
 

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E-7 Sheepdog (ret)
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The only "ratchet" out there I am aware of at the moment is the Jetaway, and to install one, you have to move the engine fwd about 5 inches. That is it, no extra parts, it's a "bolt-on".
You do remove the fwd bearing seal (and de-grease the bearing and housing), as the Jetaway lube now oil-baths the thrust bearing.
 

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The only "ratchet" out there I am aware of at the moment is the Jetaway, and to install one, you have to move the engine fwd about 5 inches. That is it, no extra parts, it's a "bolt-on".
You do remove the fwd bearing seal (and de-grease the bearing and housing), as the Jetaway lube now oil-baths the thrust bearing.
I don't think its recommended with a 3 point mouth though.
 

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BTC cardcarrying member
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correct me if im wrong.. I'm just curious, I'm running close to 100 now and thinking of adding a Jetaway.

I had a V bottom boat that ran 65mph on a good day. One day the motor lock up and the boat made a violent left hand turn. The boat rolled up on it's side and face planted me in the water, ended up with just a bloody nose.

The ratchet would have helped (motor failure) but on the other hand if the pump locks up the ratchet will not work you need a pop off to let out the intake pressure.
 

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Boat Nut
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The blow off valve can pass water more effieciently than a jet-a-way. Blow off valve, water exits out the top of the suction..... jet-a-way, water must pass thru wind-milling impeller, through bowl vanes, into the steering adapter, and out the nozzle.
 

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B1 Racing
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correct me if im wrong.. I'm just curious, I'm running close to 100 now and thinking of adding a Jetaway.

I had a V bottom boat that ran 65mph on a good day. One day the motor lock up and the boat made a violent left hand turn. The boat rolled up on it's side and face planted me in the water, ended up with just a bloody nose.

The ratchet would have helped (motor failure) but on the other hand if the pump locks up the ratchet will not work you need a pop off to let out the intake pressure.
Pumps shouldnt lock up, ever.
 

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I dont have a dog in the fight of which one is better, but I will say that for a lake boat, I'd stay with the jetaway. It allows you to start your boat on the trailer and from what I've seen of popoffs, they are allways coming apart, falling off, require quite a bit of maintenance, and to trigger them you have to either do it manually with a button on the wheel or try to set it up from intake press. to do it automatically which is a pain in the arse. I see'em at the track blowing of at half track all the time. Now I know that the newer setups have addressed alot of these problems, but I dont know if they're perfected yet. And if you were to try to trigger it manually and had a violent engine failure I think you'd be in the water before you could ever even think about touching that button.
I did see a thread on here were a guy was trien to set it up so that when the jetaway would ratchet that it would trigger the popoff, thats seems like the way to do it. But this would still be a race only dealio.
There are a whole bunch of guys out this way (myself included) that are running over 120 with just a jetaway and I havent heard of any of them having any shutdown problems, and believe me some of these guys blow up there stuff on a regular basis. They lean on'em pretty hard.
My advice would be on your lake boat, to buy a jetaway on, runit up to 60 and cut the throttle and see how she feels, if OK then run it a little faster and try again, if it begins to feel like it was going to try to turn, or hoppity hop, then you need to try some hardware changes till your shut down gets nice and smooth.
Some of these guys crutch their boats with the popoffs and this allows them to run stupid-dangerous hardware on the bottom to try to lift their boats out of the water to run faster, and while it "might" get them a little bit of et of mph , they had better hope that that popoff and none of its associated hardware fails to open or they'll be going swimmin.
So if you rely on the popoff 100% to always operate, knowing full well that if it doesnt then you'll be in a crash situation, then the popoff isnt a saftey device at all, its a crutch that when fails will get you hurt. You would have been better off without it and had to tune your boat to shut down with just a jetaway.
Your boat should be able to shut down "HARD" with or without a popoff, then use the popoff for some added protection, if done this way you will have all the safety available with these two items.
That just my .02
 

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Add the jetaway and never look back, its worth it:)bulb

Had one on my last boat and loved it, I could never imagine having another jet boat without one.

Had a issue with a lifejacket getting caught in the blower belt at about 90mph and had no problems with the boat slowing down to a safe stop with the jetaway;)
 

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I run a jetaway on both daytonas and also a popoff on the 19.

I ran a jetaway only initially on the 19 and ran low 9's, shutdown was so so..

Plenty of guys (in the 130 plus range) at the track run a solid driveline (lenco) and a popoff.
 
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