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post #1 of 3 Old 10-22-2017 Thread Starter
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Jeanneau Poker 28ft - Raw Water intake too high?

Hi everyone,

I just finished working on the Bukh DV 10 engine and seems everything is working fine.

However, the problems i had were related mostly to the head overheating and cracking. So i cleaned the Raw water intake for the engine and it draws water fine now.

But while cleaning the intake through hole seems to be really high. I mean i it almost at the waterline (2 cm below it) so i wanted to ask, is this normal?

I noticed that when sailing, the boat goes up and down and the water seems to draw some air every time it does it. Is this in general normal?

My through hole is on the back of the boat on the left side where the seats are, just near the fuel tank i installed. So i just wanted to ask if this position for the trough hole is normal for cooling.
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post #2 of 3 Old 10-22-2017
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Re: Jeanneau Poker 28ft - Raw Water intake too high?

It is most common for thru-hulls to be down low and close to the center, to allow for heeling. Although, most owner's manuals identify a max heal angle to run the main engine or generator and cooling intake is one of the limiters. I don't know if that's a normal location for yours, although, it would be pretty odd that someone relocated it.

When you say you cleaned the intake, it sounds like you cleaned the thru hull itself. Was it particularly clogged? If you were overheating, you should be as concerned with either the cooling passages in the motor, if raw water cooled, or the heat exchanger, if fresh water cooled. These will corrode and close over time. Some require disassembly, others can be cleaned by circulating a descaler.

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post #3 of 3 Old 10-22-2017
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Re: Jeanneau Poker 28ft - Raw Water intake too high?

A RW intake that close to the water line makes no sense, and indeed wave action and heeling will occasionally let the pump suck air.. not good for your already-prone-to-temp-issues engine.

I'd take a serious look at moving it.
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