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  #1   IP: 68.109.228.113
Old 08-30-2010, 09:20 AM
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Seabee Chief Seabee Chief is offline
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Unhappy Overheated

After changing our head gasket a few months ago, everything was running great! Yesterday the temp was normal until we were coming into the channel and I saw the temp gauge was buried at 225. I couldn't shut her off in the channel so I made the commitment to putt up to the fuel dock. (the first dock in the marina) It was a short 200 yards up the channel. As soon as I cut the corner I throttled down and she stalled about 50 yards from the dock. I was able to coast in and the dock hands were able to stop me with spring lines. Close call! I got a tug over to my slip. It could have been worst.
I didn't have time last night, so this weekend I plan to start working the problem by the numbers. First thing will be to check the strainer for blockages. Then check the impeller. I have never checked either since obtaining the boat last fall. If both check out OK, what else would cause the sudden rise in temp? When we changed the gasket we flushed out the engine really good. Is it time for the fresh water change over? Would it have mattered?

Chief
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  #2   IP: 38.102.16.169
Old 08-30-2010, 09:27 AM
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You could have sucked some debris (plastic bag, etc.) up against the thru-hull intake which would have shut down the flow of water. This may have fallen harmlessly away when you shut the engine down, or not.

Key question: Were you discharging cooling water out the transom when you overheated? That will tell you a lot.

Bill
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  #3   IP: 24.152.131.220
Old 08-30-2010, 09:27 AM
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If you have a blockage or failure in the raw water circuit, FWC won't make a difference. Were you shipping water out the exhaust? That would be a clear indicator right there. On my C-30 I can hear the water splooshing out the transom all the time, I particularly listen for it. When it doesn't sploosh (only once since I've owned her) the exhaust echos.

edit: I see Bill was typing at the same time as me.
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Last edited by ndutton; 09-08-2010 at 10:27 AM.
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  #4   IP: 68.109.228.113
Old 08-30-2010, 09:57 AM
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Thanks for the quick responses.
There was no water coming out of the exhaust.
I think that's what made me look at the temp gauge in the channel.
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  #5   IP: 206.125.176.3
Old 08-30-2010, 11:35 AM
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Fire her up at the dock and see if she splooshes water now...if so, I'd agree with Bill..a momentary blockage...if not, then we have a failure somewhere.
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  #6   IP: 68.109.228.113
Old 08-30-2010, 12:18 PM
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Will do. I will let you know how I make out this weekend. One thing for sure, I am going to install that MM alarm kit I purchased a few months ago.
One thing with the alarm kit, currently my blower only works when the key is on. If I hook up the alarm kit as is, the alarm will sound the whole time I am purging the engine compartmant. Shouldn't I re-wire the blower right from the battery? Will I have any problems doing this?
Chief
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  #7   IP: 216.70.184.248
Old 08-30-2010, 01:14 PM
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Quote:
Originally Posted by Seabee Chief View Post
Will do. I will let you know how I make out this weekend. One thing for sure, I am going to install that MM alarm kit I purchased a few months ago.
One thing with the alarm kit, currently my blower only works when the key is on. If I hook up the alarm kit as is, the alarm will sound the whole time I am purging the engine compartmant. Shouldn't I re-wire the blower right from the battery? Will I have any problems doing this?
Chief
Chief-
No problem hooking it up that way.
Many boats (including mine) are wired with the blower on it's own circuit switch.
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Old 08-30-2010, 01:49 PM
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Chief,

Re: blower wiring. Yes..

You simply need to move the +12v that goes to the blower switch over on the key, which is where I suspect it is currently wired. It needs to move to the terminal on the key that is hot all the time, instead of the "On" position. I just wired up a voltmeter in the cockpit that I only wanted to work with the key on & I noticed how the bilge blower was wired...I would NOT want the blower wired to the "on" position..you are burning up your coil & points/ ignition when running the blower before starting.

Do you have a separate on/off switch for the blower? Mine is a pull/push switch right next to the key in the instrument panel.
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"Holiday" - '89 Alura 35 #109
"Twice Around" - '77 C-30, #511 with original A-4 & MMI manifold - SOLD! (no longer a two boat owner!!)
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