Post Number: 24
|Posted on Wednesday, September 26, 2007 - 01:31 pm: ||
A quick question: how much water should be running through my R3M? I get a steady stream of water out of the side of our boat but I remember an old P5 used to have quite a lot more pressure? Looking at this picture of her tanking along at highish revs, do you think I need to clean up the water pump?
Last year with a rusty fuel tank and dodgy magneto we didn't get reliable enough running to have her going more than 30 mins at a time but I'd like to check before I get her out again next year (in anticipation of longer journeys!).
Thanks very much
Post Number: 5
|Posted on Wednesday, September 26, 2007 - 02:36 pm: ||
With the engine running @ full speed (1500 RPM) the R3 pump will deliver ~ 10 gallons per hour. My installation has the water injected just after the exhaust swan-neck, so it's difficult to compare with your picture; having said that, your pic looks about right.
If you have a brightish ring around each valve chamfer (& they're not excessively worn!), and sound pump packing, there's little to go wrong with the pump (assuming the seacock is positioned such that it runs in 'solid' water).
Post Number: 23
|Posted on Wednesday, September 26, 2007 - 02:40 pm: ||
I should think that the temperature of the discharged water would be the thing to watch.
Post Number: 25
|Posted on Thursday, September 27, 2007 - 08:52 am: ||
Thanks very much both for the tips. I'll give it a run and see how much is going through, and certainly on a long trip (we will get there!) I'll keep sticking my hand over the side to see how the temp is.
Post Number: 294
|Posted on Thursday, September 27, 2007 - 03:11 pm: ||
I usually find that if the cylinder is warm or nearly hot, but I can still touch without an OUCH , then it is running OK.
Most of my engines probably run too cool.