Raw water intake not working see photo. Thanks I. Advance

[Looseends]

Hi one of the intakes is not working after being in hard standing over winter.
she had a 50% antifreeze in.
now back in the water and no water from exhaust fromthat one. Thanks

 

[Looseends]

Hi one of the intakes is not working after being in hard standing over winter.
she had a 50% antifreeze in.
now back in the water and no water from exhaust fromthat one. Thanks

I have the valve lever open and opened and closed a few times.

 

[sarabande]

Separate intake seacock closed ?

Any exhaust outlet seacock closed ?

Exhaust outlet blocked ?

Air leak in seal of filter ?

Air leak in hose intake side ?

Intake full of barnacles ?

Impeller not turning properly ?

Impeller needs a bit of glycerin so that blades work effectively ?

 

[Looseends]

Hi. Thanks for your reply.
the other raw intake works fine??
So I can use the boat but having two is handy.

 

[penfold]

Do your seacocks have strainers/gratings on the outside? Given the internal strainer/seacock arrangement rodding them through is easy enough. The only other possibility is the sealing of the lid of the misbehaving strainer.

 

[Tamar]

Is that black switch for choosing which filter to use?

 

[jrudge]

If you have no water coming out then the pump impeller needs replacement.

 

[dragoon]

If I understand your setup correctly, you have two intakes and filters (switchable) to the same engine? If so, with one working okay I guess it can be assumed the raw water pump is pumping okay.

If you are suspecting a blockage on one of the intakes, you can remove the pipe from the intake to the bottom of the strainer, and blow down it with a dinghy pump. That's worked for me in the past to clear crud.

 

[Looseends]

If I understand your setup correctly, you have two intakes and filters (switchable) to the same engine? If so, with one working okay I guess it can be assumed the raw water pump is pumping okay.

If you are suspecting a blockage on one of the intakes, you can remove the pipe from the intake to the bottom of the strainer, and blow down it with a dinghy pump. That's worked for me in the past to clear crud.

Hi thanks that is the set up.

If I understand your setup correctly, you have two intakes and filters (switchable) to the same engine? If so, with one working okay I guess it can be assumed the raw water pump is pumping okay.

If you are suspecting a blockage on one of the intakes, you can remove the pipe from the intake to the bottom of the strainer, and blow down it with a dinghy pump. That's worked for me in the past to clear crud.

hi good thinking and thanks for the response ?
the set up is how you described I have pushed some fibreglass rods what Electricians use and it is clear and the value opens and closes on to the rods. It is strange as I thought the valve could of been faulty.
Any other ideas?

 

[Looseends]

Is that black switch for choosing which filter to use?

Hi thanks. yes it is a change over thing.

 

[Jamie Dundee]

Try a new sealing ring in the strainer lid. It may not be air tight therefore not priming well. Also check other hose connections as mentioned above.

 

[Tamar]

Hi thanks. yes it is a change over thing.

At the risk of pointing out the obvious, is it working ok?

 

[Looseends]

Is that black switch for choosing which filter to use?

Hi thanks yes it is.

 

[Looseends]

Try a new sealing ring in the strainer lid. It may not be air tight therefore not priming well. Also check other hose connections as mentioned above.

Thanks I will swap the lids over and see. I am worried about running the engine if no water pumps through while I check it though? ?‍

 

[Looseends]

Do your seacocks have strainers/gratings on the outside? Given the internal strainer/seacock arrangement rodding them through is easy enough. The only other possibility is the sealing of the lid of the misbehaving strainer.

Hi thanks I put some rods down and no blockage and the valve opens and closes down the rod.
not sure what to try next?
thanks again

 

[Jamie Dundee]

Thanks I will swap the lids over and see. I am worried about running the engine if no water pumps through while I check it though? ?‍

Stick a table tennis ball in the strainer before you put the lid on, you’ll soon see if it’s got water flow.

 

[dragoon]

Hi thanks that is the set up.

hi good thinking and thanks for the response ?
the set up is how you described I have pushed some fibreglass rods what Electricians use and it is clear and the value opens and closes on to the rods. It is strange as I thought the valve could of been faulty.
Any other ideas?

It could be weed or something external to the skin fitting. Can you wire all the way to outside the boat?

Have your tried priming the strainer by filling with water?

 

[Looseends]

At the risk of pointing out the obvious, is it working ok?

I think so I poked a

It could be weed or something external to the skin fitting. Can you wire all the way to outside the boat?

Have your tried priming the strainer by filling with water?

hi the rod went around 2 feet out of the bottom lol. I ran a hose in to the strainer while running engine water came out of the exhaust when I put the strainer lid back on, no water from the exhaust ?

 

[penfold]

There is an air leak in the strainer somewhere, probably the lid although with plastic housings it's always a good idea to give the rest of it a good looking at.

 

[James L]

I would try switching over to only use the faulty one for a few seconds and see if you get a flow then, your impeller shouldn't be damaged as it won't have time to heat up. If you have one pump pulling from 2 inlets and one primes before the other then I can see it quite likely the second one won't prime at all, especially if there's any tiny air leak.
Have you tried running it at speed, the increased suction at high revs might be enough to prime the second side.