Three times in the last two weeks, our engine has unexpectedly overheated after a period of 5-6 hours continuous and troublefree running. There appears to be no restrictions to the seawater inlet, the impellor pump seems fine and I've boiled-up the thermostat at that seems to be working OK too. Any ideas/suggestions?
Overheating MD6A??
- Thread starter Bob Carlisle
- Start date
I just had a related experience. My solution was to remove the thermostate housing and located that the "small" inlet was partially blocked. Cleaned that out. Removed the impeller and backwashed. My thermostate was also very stiff. Fixed and reassembled...also used some liquid gasket along with the regular material. Let that set up over night. Next day started up and have excellent water flow out of exhaust.
Amazing what a little restriction can do.
Good luck
Bob Vogel , Laughing Gull
Bob Carlisle bobnlesafloat@... wrote:
Three times in the last two weeks, our engine has unexpectedly overheated after a period of 5-6 hours continuous and troublefree running. There appears to be no restrictions to the seawater inlet, the impellor pump seems fine and I've boiled-up the thermostat at that seems to be working OK too. Any ideas/suggestions?
Amazing what a little restriction can do.
Good luck
Bob Vogel , Laughing Gull
Bob Carlisle bobnlesafloat@... wrote:
Three times in the last two weeks, our engine has unexpectedly overheated after a period of 5-6 hours continuous and troublefree running. There appears to be no restrictions to the seawater inlet, the impellor pump seems fine and I've boiled-up the thermostat at that seems to be working OK too. Any ideas/suggestions?
Hi Bob
Clogged arteries! Check teh manifold as this is the usual cause. 4 x
long bolts but be careful with the gasket as tehy cost a fortune (£50).
Take manifold off and clear all clogging-up.
Cheers
Steve Birch (Technical)
Clogged arteries! Check teh manifold as this is the usual cause. 4 x
long bolts but be careful with the gasket as tehy cost a fortune (£50).
Take manifold off and clear all clogging-up.
Cheers
Steve Birch (Technical)
Robert, what do you mean by "backwashed" ? Cheers, Trevor (Mystic Rose
- V2915)________________________________
From: AlbinVega@yahoogroups.com [mailto:AlbinVega@yahoogroups.com] On
Behalf Of Robert Vogel )
Sent: October 9, 2006 10:58 AM
To: AlbinVega@yahoogroups.com
Subject: Re: [AlbinVega] Overheating MD6A??
I just had a related experience. My solution was to remove the
thermostate housing and located that the "small" inlet was partially
blocked. Cleaned that out. Removed the impeller and backwashed. My
thermostate was also very stiff. Fixed and reassembled...also used some
liquid gasket along with the regular material. Let that set up over
night. Next day started up and have excellent water flow out of exhaust.
Amazing what a little restriction can do.
Good luck
Bob Vogel , Laughing Gull
Bob Carlisle bobnlesafloat@...
mailto:bobnlesafloat%40yahoo.co.uk wrote:
Three times in the last two weeks, our engine has unexpectedly
overheated after a period of 5-6 hours continuous and troublefree
running. There appears to be no restrictions to the seawater inlet, the
impellor pump seems fine and I've boiled-up the thermostat at that seems
to be working OK too. Any ideas/suggestions?
- V2915)________________________________
From: AlbinVega@yahoogroups.com [mailto:AlbinVega@yahoogroups.com] On
Behalf Of Robert Vogel )
Sent: October 9, 2006 10:58 AM
To: AlbinVega@yahoogroups.com
Subject: Re: [AlbinVega] Overheating MD6A??
I just had a related experience. My solution was to remove the
thermostate housing and located that the "small" inlet was partially
blocked. Cleaned that out. Removed the impeller and backwashed. My
thermostate was also very stiff. Fixed and reassembled...also used some
liquid gasket along with the regular material. Let that set up over
night. Next day started up and have excellent water flow out of exhaust.
Amazing what a little restriction can do.
Good luck
Bob Vogel , Laughing Gull
Bob Carlisle bobnlesafloat@...
mailto:bobnlesafloat%40yahoo.co.uk wrote:
Three times in the last two weeks, our engine has unexpectedly
overheated after a period of 5-6 hours continuous and troublefree
running. There appears to be no restrictions to the seawater inlet, the
impellor pump seems fine and I've boiled-up the thermostat at that seems
to be working OK too. Any ideas/suggestions?