You may remember my saga from last fall. I didn't work on the starboard engine much this year because I pulled out the interior. Installed new panels (luan covered with those recycled plastic panels), had new countertops made (white laminate) and new bulkheads covered with the same white laminate. Now that I'm nearly finished with the interior--got most of the galley back together today--I'm focusing again on the starboard engine.

After installing a rebuilt water pump that did not draw water through the strainer and letting the mechanic of the day at the marina try to fix it--and you guessed it, he put it in backwards once so he had put two impellers in on top of a new thermostat--I ended up installing a new water pump. Still no water pulling through the strainer. Today I installed an o-ring on the strainer and a new domed top. Last week, I pulled both hoses off both the port and starboard sea-cocks and the flow out of both was the same. Just to check, I pulled the hose off the transmission cooler and water came out. It seem some water is getting drawn, but you can't see it going through the strainer like you can with the port engine. Today, I got the strainer top on so tight, I had to yank it to get it off--kind of a suction effect. Still not drawing water through the strainer. Last year I pulled the transmission cooler and ran a coat hanger wire through all the holes.

What's left?

Thank you.

Yes, the engine is overheating--or it least it was prior to the new water pump. I see water flowing out the exhaust, but the exhaust is partially submerged so it's hard to tell if it's just flowing out when the boat rocks or actually flowing.

Good tip on the impeller. Thanks.

I had similar problems last year (there is a trail of reports on it thru the engine/mechanical prt of this site). What cured it finally this spring: 1- I put new gaskets in the strainer and I see that you have done that already along with a new top piece. 2- I changed the hoses that run from the seacock to the strainer. The old ones had some cracks that seemed minor to the eye.

But the combination of those things cured the o'heating. good luck as you chase it down. The other posts here have good suggestions; Also, look up the ones given to me last year. I decided that I agree with those who said it was an air leak preventing water from being circulated properly. By the way, you didn't say whether you have a raw or fresh water cooled system.

I've heard of liquid detergent foaming so much it forms a clog. So either use a tiny drop or consider vegetable dye, instead

Have to agree with Jeff, one of my friends did the same thing with the same results

Mike

And yes, I put it in upside once last year and one of the mechanics of the day did the same thing this year until I pointed it out. I have the new pump in correctly according to Jeff's diagram. I'll keep digging and post what I find.

Wonder why the pump maker didn't label the inlet and outlet? At least an arrow!

I think we could all make better boats than anybody currently in that business.

Thanks everyone.

Thanks everyone. Here's today's report. Pulled the hoses from the strainer to the T fitting and they were all free of debris. Flushed water both ways through the transmission cooler. Put the intake hose from the sea-cock to the strainer on the port engine. It drew fine. Pulled the outlet hose off the T fitting on both engines. Port engine pumps fine. Starboard not at all. Swapped strainers. Same story. I don't see any cracks in the lines, but it has to be that. Maybe I should just buy some hose and replace all of it from the strainer to the pump. Could the oil cooler be the source of an air leak?

The saga continues!

Thank you.

i had a power steering cooler on my bow rider bust at the sorder joint holding the necked down end on it leaked water and did not leak oil.


tim

It must feel good...you were lucky that it was the stbd engine, much easier to get to that part.