waterpump

russeller

Petty Officer 1st Class
Joined
Jun 19, 2004
Messages
218
on my 1966 40hp rude water comes out the pee hole on the back of the motor fine at a idle and a around 10 mph once i go wot water is not coming out that i can see of really comes out at idle though
 

Solittle

Fleet Admiral
Joined
Apr 28, 2002
Messages
7,518
Re: waterpump

Repalce the water pump. If ia isn't working right at WOT you will cook the motor.
 

BoatBuoy

Rear Admiral
Joined
May 29, 2004
Messages
4,856
Re: waterpump

Also, check the water pickup above and behind the prop to make sure it isn't clogged.
 

OBJ

Supreme Mariner
Joined
Dec 27, 2002
Messages
10,161
Re: waterpump

Part of the problem may also be t-stat related. Possible it's not coming all the way open or is stuck partially open. Do as suggested in the previous posts and also replace the t-stat.
 

russeller

Petty Officer 1st Class
Joined
Jun 19, 2004
Messages
218
Re: waterpump

so the problem i amhavign is the waterpump ? it seems to work at 1/2 throttle but not at full
 

sledhead041

Seaman
Joined
Jun 8, 2004
Messages
61
Re: waterpump

Sometimes when a impeller is getting tired it will pump good at idle but the when the rpms are higher the blades can’t handle the load and fold back.
 
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