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Old 12-22-2017, 12:13 PM   #2971
starbright55
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Re: California Dive Boats -- the legend of Radon (pictures)

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Good call on the second water source. Do you have to manually close the valve on the thru hull when you flush the motor from the outdrive or is there some sort of check valve? I'm going with MPI and freshwater cooling.
I had almost the same set up. In my case, the impeller pulled hard enough that it wasn't necessary - no water came out the other opening unless the engine was off.
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Old 12-22-2017, 04:46 PM   #2972
sbsurfer
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Re: California Dive Boats -- the legend of Radon (pictures)

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Originally Posted by CIdiver View Post
Good call on the second water source. Do you have to manually close the valve on the thru hull when you flush the motor from the outdrive or is there some sort of check valve? I'm going with MPI and freshwater cooling.
I close the thru-hull valve, open the big brass sea strainer that is is after the "t" that combines the outdrive pickup and thru hull pick up, i shove the hose in there (I should just tap the lid and put fitting in)...and I flush from there.

Last edited by sbsurfer; 12-22-2017 at 07:02 PM.
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Old 12-23-2017, 09:03 PM   #2973
Edward_Anderson
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Re: California Dive Boats -- the legend of Radon (pictures)

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Originally Posted by CIdiver View Post
Good call on the second water source. Do you have to manually close the valve on the thru hull when you flush the motor from the outdrive or is there some sort of check valve? I'm going with MPI and freshwater cooling.
If you use a Groco ARG strainer (ARG-1250 or 1500) you can leave the thru hull open. On the ARG the outlet to the engine is lower than the inlet from the drive.

On a Bravo (no water pump in the drive like the alpha) you just unscrew the cap, toss the hose in and start the engine. All of the excess water will go out the intake and out the thru hull.
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