1950 PO15 waterpump?

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Mas
Posts: 171
Joined: Sat Mar 14, 2015 10:53 am

1950 PO15 waterpump?

Postby Mas » Sat Dec 02, 2017 11:21 pm

I see many people starting their PO15 dry on Youtube videos...what type of pump does it have? I've got a 1950 PO15...and may try to start dry too if it doesn't harm....just for a few seconds.

Mas

PM T2
Posts: 209
Joined: Mon May 30, 2016 10:06 pm

Re: 1950 PO15 waterpump?

Postby PM T2 » Sat Dec 02, 2017 11:39 pm

PO's don't have a water pump, the cooling system works on the pressure-suction principle. No water pump. so no moving parts that can be harmed.

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Garry in Tampa
Posts: 2196
Joined: Mon Mar 09, 2015 2:32 pm
Location: Florida

Re: 1950 PO15 waterpump?

Postby Garry in Tampa » Sat Dec 02, 2017 11:52 pm

It uses a Pressure/Vacuum system. The propeller is more or less the pump impeller. Usually the start position is fast enough for the prop the force water into the water intake on the front of the exhaust outlet. After the water jacket is full, the water runs dawn the outlet tube to an opening in the back of the gear case in front of the propeller. This acts as a siphon helping pull water up the intake tube. Once this circulation is established, the PO will remain cool at an idle. Any air leaks will defeat the system and cause overheating. So - a few seconds running dry will do no harm. . . :)
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Mas
Posts: 171
Joined: Sat Mar 14, 2015 10:53 am

Re: 1950 PO15 waterpump?

Postby Mas » Sun Dec 03, 2017 12:16 am

Perfect...thank you!

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Buccaneer
Posts: 2159
Joined: Mon Mar 09, 2015 9:34 pm

Re: 1950 PO15 waterpump?

Postby Buccaneer » Sun Dec 03, 2017 8:39 am

I test started mine this summer using a "fountain pump",
sucking water out of a 5 gallon bucket. I had the prop
off. The fountain pump was plumbed to the "water intake"
using a block of wood and rubber gasket and a
Rube Goldberg affair to clamp it on.
It did work, but I had a hard time getting a good
seal, so I only ran it a couple of minutes.
It had potential, but a better design needed!


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