Engine sea cock

[Bella Notte]

79 voyager 3326 port engines exhaust got very hot and had to be shut down. It wasn't pumping sea water (freshwater cooled engine). Began trouble shooting at the sea strainer, closed the sea cock and opened the strainer and it is clean. Opened the sea cock (with the strainer still open) expecting water to at least bubble out of the strainer and none did. Is this normal? Shouldn't water run out do the strainer when the strainer is open and the sea cock is open?

[Viper]

Normally it should as they are typically at or below the waterline but I have seen some that are above the waterline. If this is the case with you and you're trying to find out if your thru hull intake is blocked, shut the valve off, remove the hose and open the valve. You should get water flow. Don't expect to see Niagara Falls here, it won't be as drastic a flow as you might think. If you don't get water flow, you can try flukshing it out with a garden hose or compressed air.

When was the last time the impellers were replaced? What kind of engines are they.

[AaHubb]

Try using a wet/dry vac to empty the strainer then open the valve. If it doesn't refill quickly try using the blower port on the vac to clear the thru hull.
..Aaron

[Bella Notte]

Thank you I'll give that a try. Bets trying to remove the hoses like I was going to try. This boat was not made to work on.

[Bella Notte]

Gas engines GM350s. Replaced the impels with in the last 60 operating hours. I was expecting a gusher but I will certainly follow up on your suggestion. Thank you.

[RGrew176]

Qr Bbpost Thank you I'll give that a try. Bets trying to remove the hoses like I was going to try. This boat was not made to work on.

Most smaller boats are not made to work on. At my age now I will still do some stuff but most of it I will pay to have done. Much simpler for me that way although it does make the wallet a bit lighter.