Overheating or not overheating ?

[kghowe]

Can anyone help or had similar problems? I was out last weekend and after rounding hurst Pt the Solent was dead flat. Could resist opening up the two AD41's to 'clean off the bottom', as you do. Managed 36 kts on GPS, not bad. Backed her off to about 32kts. After about 15mins engine hot alarm prt engine sounded. Checked all temperatures and pressures nothing out of place. When I got back had a proper look and found nothing wrong. Just before we went to Poole she was serviced with fresh oil, filters etc. Coolant changed as well.

I've run the boat out since but the alarm wouldn't sound. Mind you it was too bumpy to go any faster than 25kts.

Has anybody got any ideas?

KGH

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[Happy1]

I had an alarm sounding from my Volvo petrol engine, it was a faulty sender situated on one of the manifolds, they changed both and a week later they went off again. Both have been changed again and it seems OK now. I don't know if you have the same, they look like mini spark plugs on the manifold, a wire comes off them and they just unscrew. Hope this is of some use.

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[jimg]

Are you saying that the gauge read normal but alarm was sounding?

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[kghowe]

Nicely put. Exactly right.

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[kghowe]

I think this my be the cause on mine, I'll check it out tomorrow using the other sender on stb engine.

Cheers
KGH

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[Col]

You have 2 senders on that engine. 1 for the alarm, the other for the gauge. I would suggest one of them is faulty.

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