SoCal Jet Boats

Tech Talk => Engine Mechanical / Electrical => Topic started by: Hozer760 on June 03, 2018, 11:53:20 PM

Title: Newbie question.
Post by: Hozer760 on June 03, 2018, 11:53:20 PM

Just bought my first jet boat and I’m thinking of taking it out next weekend but I have some questions can you guys please help. Is this my gate valve to control water pressure going into the block? And also when I get to the launch should I let it run on the trailer with the valve half open and let it warm up before doing adjustments?  What is the highest and lowest temp range it should stay? It’s a bbf. Thanks In advance.


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Title: Re: Newbie question.
Post by: nickm on June 04, 2018, 10:23:06 AM

Yes that’s the one. Should idle in water at 140 degrees.


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Title: Re: Newbie question.
Post by: 5150Gomez on June 04, 2018, 11:10:07 AM

 that style has the most control over the water pressure that enters the motor. Most guys crack it a little on initial fire-up on the trailer and then open it more as the motor warms up. Keep it on the trailer and let it warm up and keep turning the knob until you get it where you like it.

Title: Re: Newbie question.
Post by: Hozer760 on June 04, 2018, 02:28:47 PM

Quote from: nickm on June 04, 2018, 10:23:06 AM

Yes that’s the one. Should idle in water at 140 degrees.


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Title: Re: Newbie question.
Post by: Hozer760 on June 04, 2018, 02:32:10 PM

Quote from: nickm on June 04, 2018, 10:23:06 AM

Yes that’s the one. Should idle in water at 140 degrees.


So when it idles at 140 it’s ready to go?  What degrees is too hot for a bbf like to where I should shut it off before I mess something up? And what degrees is to low when running? Thanks for the reply man appreciate it


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Title: Re: Newbie question.
Post by: Hozer760 on June 04, 2018, 02:32:53 PM

Quote from: 5150Gomez on June 04, 2018, 11:10:07 AM

that style has the most control over the water pressure that enters the motor. Most guys crack it a little on initial fire-up on the trailer and then open it more as the motor warms up. Keep it on the trailer and let it warm up and keep turning the knob until you get it where you like it.

Cool I’ll try it out this weekend thanks for the reply man


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Title: Re: Newbie question.
Post by: mash on it on June 04, 2018, 06:27:13 PM

With headers like yours, 130 is plenty.

This is a single pass system, lake at 80° engine exit temp 130. (that's adding ~50°)

This is not a car. Don't run it at 180. That would be adding 100° to the exit temp.

Dan'l