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Hi KW, thank you for that. The symptoms are excessive steam in exhaust and temp rising above 180 in anything above 1600 RPM. Runs fine at 1500 RPM. Apart from high temp, the engine starts immediately andruns as sweet as a nut. Water is coming from exhaust but I just have a feeling (from running other boats) that not enough may be coming out. Calorifier works fine. No excessive smoke in exhaust.

My strategy isn't so much whack a mole but to go systematically through everything. I've already done some things thanks to previous advice in another thread. Now I'm going to do it all again in this order:

1. Check accuracy of temp gage.
2. Check correct operation of thermostat
3. Replenish coolant and burp system (Done once)
4. Check raw water inlet for blockage (done once)
5. Check strainer for blockage (done twice)
6. Replace impeller and check housing (done once)
7. Clean HX (anode debris removed but I'm now going to de-scale it with Lime-Away)
8. Check injection nipple in riser for blockage.

Not on my list, so far either because I don't know how to do it or am going to wait until the end of the season, are:

1. Check operation of freshwater coolant pump.
2. Check operation of aqualift
2. Inspect riser for internal blockage

The only thing that's niggling me is the state of the impeller housing. In a previous thread I read that there must be no scoring and that it must be 'flat, flat, flat'. I didn't think mine was too bad, but now I'm not so sure.

Thank you Stu, that makes sense. Just to be clear, the nipple your talking about is this thing circled in red?

I assume this small diameter pipe is where raw water gets injected into the exhaust?

Looks completely different from CD's 'riser'

[westerbeke exhaust elbow]

Google "westerbeke exhaust elbow" and "westerbeke exhaust riser"

[/quote]

Dang, I wish I hadn't done that. Now I'm confused again!

Thanks guys.

I'm building a short-list of all the prime suspects for my (still) ongoing engine overheating issue.🙄

I'll start by replacing the thermostat, then re-furb the pump (again) then over winter I'll have the HX out and de-scale it. Sounds like the riser will now be last on my list of things to check/replace because there are no obvious leaks from it.

Thank you! Just one more question. Is the riser just as susceptible to becoming clogged over time as a conventional elbow?

Hi all,

Sorry, another newbie type question. Is what Catalina Direct calls an 'exhaust riser' the equivalent of an 'exhaust elbow'?

Stu, what prompted you to rebuild your pump? What were the symptoms showing that the pump needed a rebuild? Leaks? Engine running hot?

Well, on the bright side it's not as bad as putting coolant in the oil system. Personally, I would overfill with coolant and try to flood out/dilute the oil. Draining probably wouldn't do a lot of good.

Looks like it ended up going well south of San Diego but, my, what a storm!

Holger, if you need spare parts for the WheelPilot then I thoroughly recommend these guys:

https://www.svb24.com/

They got a replacement WheelPilot to me in Spain in less than 24 hours!

Yep, pretty sure it has a slight taper Holger. A couple of taps with a wooden mallet should do the trick.

Hi Ron, good to know about that pipe for other projects. However, my SP is mounted on the sprayhood so this isn't an option.

PByrne, yes, I think ziplocks etc are the best option.

Hmm, definitely no option but to run the cables externally. Thanks, for all the input guys.

Keel : You could also run a 12V wire to a plug in the aft cabin!!

A thought

Not sure how to do this Ron, without having exposed runs in the cabin. I was hoping for a hidden solution but this is looking unlikely.