Engine cooling - Std Bravo lower unit pickup vs transom mount water pickup

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07-23-2019 | 12:20 PM

#11

1 MAIDEN AMERICA

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From: Renton, Wa

160* sounds fine to me

07-23-2019 | 12:58 PM

#12

payuppsucker

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From: Collierville, TN and Pickwick Lake

Quote:

Originally Posted by flashgordon

wow ,,this is all new to me
i have transom water pickup
goes to strainer , then oil coolers, then pump to motor.
i have never noticed any issues, but my boat is not a 100 mph boat...
should i be considering adding a relief valve?????????

Do you have a water pressure gauge?

07-23-2019 | 01:01 PM

#13

89Force235

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Quote:

Originally Posted by 1 MAIDEN AMERICA

160* sounds fine to me

It keeps going... I haven't pushed it any farther to see when/if it'll stop

07-23-2019 | 01:05 PM

#14

89Force235

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Quote:

Originally Posted by payuppsucker

I've never converted from a drive source to a transom style pickup but most of my boats have had transom pickups. If you go with a transom mounted pickup you will need to add a pressure relief valve between the pick up and the pump to bleed off some of the water when running at speed.
Hardin also makes an adjustable pickup.

I read some place that the relief is not necessary as long as you've dialed in the pickup with a gauge and you're not flying the boat out of the water. The author noted the spikes in pressure are from re-entry.

Four what its worth my boat doesn't fly but does run about 75mph on the top end.

07-23-2019 | 01:17 PM

#15

flashgordon

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From: new baltimore mi

Quote:

Originally Posted by payuppsucker

Do you have a water pressure gauge?

no i dont have water pressure gauge,,,,
my boat is NOW closed coolant system..
dont know if that makes any difference...
but just posting that..
motors use to run 140-160 no thermostats

07-24-2019 | 07:31 AM

#16

payuppsucker

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From: Collierville, TN and Pickwick Lake

Quote:

Originally Posted by flashgordon

no i dont have water pressure gauge,,,,
my boat is NOW closed coolant system..
dont know if that makes any difference...
but just posting that..
motors use to run 140-160 no thermostats

You should be good to go without the regulator.

07-24-2019 | 08:01 AM

#17

green lightning

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Joined: Jan 2010

Posts: 617

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From: syracuse ny

I converted my boat over to transom adjustable pick ups and love them , The only problem I encountered was breaking the welds off the pick ups so I welded the pick ups after I checked the pressure and then they were good. Then when I added two stage sea water pumps and intercoolers I did not have enough pressure at speed so I fish mouthed the bottom of the boat right in front of the pick ups and I have 15-17lbs of pressure at a little over 100mph engines run nice and cool.