My first A4 debug: a stuck #4 valve

[roadnsky]

Now, I'm concerned about the temperature of the engine. After letting it run for about 10 min the temperature gauge read 200. This appears to be the original gauge and I don't know if it reliable or not. Based on what I've read on this forum, it seems like I should be seeing something closer to 150-160 for my fresh water intake.

Gary-
Can you touch the head for a few seconds without burning your fingers
(Hint: wet them first please )
If not, your gauge is likely accurate.
If you can, I'd invest in a new gauge.
IMHO, the temp and oil gauges must be functional.

[ILikeRust]

The exhaust has a steady "putt-putt" of water coming out the stern exhaust. I don't know if that's the right amount or not. One indication that it was getting water was that I had left the hose on top of the exhaust manifold disconnected by mistake and there was a steady stream of water shooting out of it before I saw that mistake.

Should I be concerned? Is it time for a new impeller or something else?

Sounds correct. The hose on top of the exhaust manifold will discharge a steady stream of water - but that stream dumps into the exhaust downstream of the hot section, and into your wet lift muffler. In the muffler, the water accumulates until there is a "batch" of water large enough that the exhaust pressure blows it out the tailpipe. So you get that "batching" effect.

Here is what mine looked like on the hard, right after I re-installed my overhauled engine and got it fired up for the first time after the overhaul:

[YOUTUBE]J-ts7GJ1oHg[/YOUTUBE]

[ndutton]

If original, the Catalina 27 exhaust does not have a waterlift. It's a straight run from the water injection to the transom.

[ILikeRust]

Well then, that's different!

[gagabriele]

Thanks for the replies. My manifold is definitely too hot to touch so the gauge is probably working. Also, I do have the setup shown by Neil from the Catalina 27 parts catalog. After looking through some more information on the site, I think I need to go through the water inlet side and make sure that the cooling passageways are clear. I'll probably order a new impeller as well list to be safe.

As always, thanks for all the great feedback and suggestions.

Gary

[nyiftos]

you have 2 real options
1) run the engine as best as possible on 3 cylinders and 95% chance that the stuck valve will free itself after long enough of running.
2) take side plate off(yes remove carb, etc) and with a pry bar move valve closed, turn engine by hand( plugs removed) until valve opens again and over and over again with the use of a good spray until you will see the valve spring do the job on its own