Is 40 lbs pressure enough?

Riley1840

Seaman Apprentice
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Dec 31, 2024
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Started engine for first time in 40 days. Had muffs on turned on water then started motor [started right up] didn’t see water from Pete hole after 30 seconds so shut down motor. I have 40-45 lbs pressure on hose, did I not wait long enough? Motor has been in vertical position whole time. Reason wanted to run motor was to adjust tach that I just installed.
 

Scott Danforth

Grumpy Vintage Moderator still playing with boats
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if that 40 psi comes at 20 GPM, then maybe. if that 40 psi comes at 1 gpm, then no.
 

jimmbo

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May 24, 2004
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How long is that Hose? Was it completely Kink Free?
40 psi, as mentioned above is Meaningless, if the Flow is very low

And now for the Rest of the Story.... Any other work done to the Engine?
 

Riley1840

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Dec 31, 2024
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Don’t know flow Tate. No work done to engine other then hookup tach. Drag in my curb side trash bin filled up to 8 inch above cavation plate stared engine in less then 30 seconds water was coming out telltale. So I figure I don’t have enough flow. Thanks for replies. On to the next little thing.
 

Riley1840

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Dec 31, 2024
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How long is that Hose? Was it completely Kink Free?
40 psi, as mentioned above is Meaningless, if the Flow is very low

And now for the Rest of the Story.... Any other work done to the Engine?
Hose is 25 feet no kinks.
 

jimmbo

Supreme Mariner
Joined
May 24, 2004
Messages
13,525
Started engine for first time in 40 days. Had muffs on turned on water then started motor [started right up] didn’t see water from Pete hole after 30 seconds so shut down motor. I have 40-45 lbs pressure on hose, did I not wait long enough? Motor has been in vertical position whole time. Reason wanted to run motor was to adjust tach that I just installed.
Don’t know flow Tate. No work done to engine other then hookup tach. Drag in my curb side trash bin filled up to 8 inch above cavation plate stared engine in less then 30 seconds water was coming out telltale. So I figure I don’t have enough flow. Thanks for replies. On to the next little thing.
In one you say "didn’t see water from Pete hole after 30 seconds "
The next you say "stared engine in less then 30 seconds water was coming out telltale"

Which is it?
 

racerone

Supreme Mariner
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Dec 28, 2013
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38,178
Some motors are shy running on a hose.--Too much air in pressurized water is the reason.-------Take boat to launch ramp and test there.
 

Riley1840

Seaman Apprentice
Joined
Dec 31, 2024
Messages
46
In one you say "didn’t see water from Pete hole after 30 seconds "
The next you say "stared engine in less then 30 seconds water was coming out telltale"

Which is it?
When using hose with muffs no water from telltale. When in trash can with water above cav plate water came out of telltale in less then 30 sec.
 

MattFL

Master Chief Petty Officer
Joined
Oct 20, 2010
Messages
874
The hose isn't giving you enough volume of water.
 
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