SoCal Jet Boats

Tech Talk => Jet Pumps => Topic started by: raysoncraft1 on May 17, 2018, 10:46:43 AM

Title: Motor is out got only one trip new motor
Post by: raysoncraft1 on May 17, 2018, 10:46:43 AM: F.....k

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Title: Re: Motor is out got only one trip new motor
Post by: hbkeith on May 17, 2018, 11:00:43 AM: Damn, what happened??
Title: Re: Motor is out got only one trip new motor
Post by: Undersoul02 on May 17, 2018, 11:34:27 AM: That sucks! Like already asked, what went wrong? Hope it get turned around quick!
Title: Re: Motor is out got only one trip new motor
Post by: 08chevyguy on May 17, 2018, 03:53:09 PM: Damn....what a bummer

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Title: Re: Motor is out got only one trip new motor
Post by: bobjthomson on May 17, 2018, 06:11:22 PM: B O A T LOL , sorry bro , hope it’s an easy fix , rebuilding my boat as we speak, hope to have it done soon and pray to the river gods that I have no gremlins 🤞

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Title: Re: Motor is out got only one trip new motor
Post by: Bigblockchevy1691 on May 17, 2018, 06:42:22 PM: I bought a new boat few months ago. Put some good time and coin in her. Finely started the motor and 2 min later pump locked up.

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Title: Re: Motor is out got only one trip new motor
Post by: 75 Southwind on May 17, 2018, 06:59:30 PM: Damn... I’m having mine being built right now by Jim Gunthrie racing hopefully dropping it in on Saturday and I cross my fingers hearing stories about that...

Good luck hope you can get it up and running for the rest of the season

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Title: Re: Motor is out got only one trip new motor
Post by: raysoncraft1 on May 17, 2018, 07:33:25 PM: What happened was last year I heart 2 Pistons.
The shop that usually works on my stuff was very very busy.
So a friend said I know someone he's a machine shop he can do it for you.
So I figured honing it out pistons and rings rebalance new bearings I'm done ready to go.
This guy took it on himself saying he didn't like my bearing clearances and he freaking change them so when I was at the river for the first time at the SoCal meet I had barely any oil pressure.

This guy didn't like that he open my bearings for the rods 3.4 to
And the main store 4.4 I had no oil pressure that was way too loose.
As well.
Brand new motor my rings didn't see. I don't know what he did I have 25% leak down on every cylinder.
So I'm very upset I pulled my motor out and that's where we have it he's going to put the bearings back to the main 3.2 the rods 3.0 and new rings.

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Title: Re: Motor is out got only one trip new motor
Post by: rivrrts429 on May 17, 2018, 08:48:15 PM: Quote from: raysoncraft1 on May 17, 2018, 07:33:25 PM
What happened was last year I heart 2 Pistons.
The shop that usually works on my stuff was very very busy.
So a friend said I know someone he's a machine shop he can do it for you.
So I figured honing it out pistons and rings rebalance new bearings I'm done ready to go.
This guy took it on himself saying he didn't like my bearing clearances and he freaking change them so when I was at the river for the first time at the SoCal meet I had barely any oil pressure.

This guy didn't like that he open my bearings for the rods 3.4 to
And the main store 4.4 I had no oil pressure that was way too loose.
As well.
Brand new motor my rings didn't see. I don't know what he did I have 25% leak down on every cylinder.
So I'm very upset I pulled my motor out and that's where we have it he's going to put the bearings back to the main 3.2 the rods 3.0 and new rings.

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You sure you want him touching your motor again?

Sorry to hear bud. Hope it gets resolved quickly.
Title: Re: Motor is out got only one trip new motor
Post by: raysoncraft1 on May 17, 2018, 09:26:46 PM: He said he's going to tighten up the clearances so I'm not worried about that my thing is why would the Rings not seat that's my question anybody have any answers out there.
I don't know what Rings he used.

I will this time though.

My tune up my carburetors have been the same for ever been running the same set up for a long time.
He's trying to say I wash them out

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Title: Re: Motor is out got only one trip new motor
Post by: Bigblockchevy1691 on May 18, 2018, 02:55:38 PM: What type of rings did you run?

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Title: Re: Motor is out got only one trip new motor
Post by: Josh Rickards on August 03, 2018, 12:06:08 PM: That's a lot of leakdown in every cylinder. Ideally you want less then 3%. Consult the piston manufacturer and let them know this is for marine use, the piston to wall clearance is different for auto/marine use. Sounds like he was setting the engine up like an auto application. Ring end gap is also a huge factor as well and again is set up entirely different for marine application. Is this a fresh water cooling application or raw water? I'm guessing you are running lake water thru the engine.
Title: Re: Motor is out got only one trip new motor
Post by: raysoncraft1 on August 03, 2018, 12:25:56 PM: Quote from: Josh Rickards on August 03, 2018, 12:06:08 PM
That's a lot of leakdown in every cylinder. Ideally you want less then 3%. Consult the piston manufacturer and let them know this is for marine use, the piston to wall clearance is different for auto/marine use. Sounds like he was setting the engine up like an auto application. Ring end gap is also a huge factor as well and again is set up entirely different for marine application. Is this a fresh water cooling application or raw water? I'm guessing you are running lake water thru the engine.
It's all back together ready to rock and roll he set the clearances to what I suggested I told him what to do it just works been slow gas is expensive just waiting to go out and run it

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Title: Re: Motor is out got only one trip new motor
Post by: lupo1904 on August 03, 2018, 10:34:11 PM: Happens to the best of us, I had a brand new 496 built that was a pretty penny and dyno tested the motor and made 630 hp. I had the boat for 2 years but never put it on the water. I had to go with a remote oil filter. Never had one. I thought in hours to in and out goes to out. Totally my fault but as soon as it started knocking I shit it off. Was a tick at first and didn’t think anything about it. Then the knock. Spun a bearin, turn the crank, new lifters and bearing and gaskets. Clean up the crank. Should be good to go.

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