|Topic Review (Newest First)|
|06-26-2008 08:19 AM|
I don't know as it's pressure rated. That's unimportant in this application. All I'm talking about is a 3' length of temporary hose with a double-ended barb in one end that's used to suck RV anti-freeze out of a bucket as part of winterization prep.
|06-26-2008 06:21 AM|
raw water intake
I did get some very useful info from my local Yanmar dealer. He said that the rate of flow from my Yanmar 2GM20F should be 2 GPM at 700 to 11 GPM at 3300 RPM.
Thanks to all for suggestions..now back to solve the mystery
|06-25-2008 02:01 PM|
|negrini||Going a little back, Rchad, first look to the flow of a similar boat on your marina and visually compare, then you can take indirect measurement like your engine temperature under different revs/load, wich ultimately is what you want to be under control. Finally, put your hand on the discharge and that should be somehow "warm" not disconfortably hot, neither cool at all. Remember this is an integrated system where strainer, pump, exchanger, raiser, waterlock, mufflers, lenght of hoses, diameters, etc... should be matched. Best procedure, is to contact dealer or a local experient mechanic.|
|06-25-2008 12:37 PM|
That was my point. I had the part on board. If that wonderful woman hadn't insisted that I buy it before I left, I would have been screwed. The old one had rusted completely through.
|06-25-2008 12:20 PM|
Yeesh. Be glad you could get the part at all. I think at that point I might have pulled the elbow and tried to figure out some way to clean it (pressure wash?) long enough to last me until I got back to the States.
Good story though, which is all that matters, right?
|06-25-2008 11:39 AM|
I sure wouldn't have wanted to have had one sent to me there. The other cruisers were saying that it took six weeks or more to get things sent from the states and it wasn't cheap.
|06-25-2008 11:15 AM|
|06-25-2008 10:26 AM|
There was a very knowledgeable lady at the Yanmar dealership in Oakland years ago where we went to purchase spares for the boat before leaving the country. She insisted that we purchase a mixing elbow. It wasn't even on my list.
Listening to her proved to be one of the smart things I did in preparing for that trip.
It was a hot, dirty job and my whole engine compartment was cover in soot, but at least I was able to fix it.
That's exactly what I checked out first. There was no way the intake was out of the water. Though it may have gulped some air. It was pretty bouncy.
The thing is, after bypassing the strainer, the problem went away.
I have a new engine and the same strainer now but the hoses are led differently. I haven't experienced a recurrence of the problem yet, but I really haven't been it that rough of a situation with the new engine yet.
|06-25-2008 10:23 AM|
|beej67||Where were you able to find pressure rated hose that's clear?|
|06-25-2008 10:20 AM|
One would think air in the fresh water intake should go away pretty quickly.
I've a length of clear hose I hook to our normal intake for pumping anti-freeze through the system prior to winter lay-up. Naturally, when I first hook that in, it's got nothing but air in it. Soon after starting the engine the entire length, about three feet, is solid purple all the way. I can't even tell the water is moving by looking at the hose.
In the case of a strainer, I guess it would depend on where the intake and output are. If the intake is on top, where the bubble is, I guess I can see it remaining. Unlike Steve, tho, I can't see it much affecting water flow rate.
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