GL: What happed to the Great Loop

[Captain Michael J Dailey]

Hi Bob,
 If the raw water discharge is the same or nearly so from both engines with
the checks you have already made that should eliminate the raw water side of
it.
Check the thermostat. Try removing it and running the engine with it out if
you can do that. Some engines have a bypass arrangement that needs the
thermostat body in place. Either way, boil a pot on the stove with the
thermostat immersed in it and a thermometer and watch for it to open and
note at what temperature that happens.
If there are any issues with it, bin it and replace it for $25 or $30.
Good luck,
       Mike
 



-----Original Message-----
From: great-loop-bounces at lists.samurai.com
[mailto:great-loop-bounces at lists.samurai.com] On Behalf Of Matt Mattson
Sent: Monday, July 14, 2008 6:15 PM
To: Bob DeGroot
Cc: great-loop Loop
Subject: Re: GL: What happed to the Great Loop

Have you checked the hoses for spongy spots, sometimes they denote an  
area of de-lamination where the inside wall of the hose collapses.   
You might also want to check the exhaust for obstruction as well --  
that should be an easy check with twins.

Good luck!

On Jul 14, 2008, at 10:24 AM, Bob DeGroot wrote:

> We're starting the loop at the end of September or first of October
> depending on the weather. Yesterday a friend who completed the loop  
> gave us
> the charts, CDs, cruising guides and books he used. They weighed  
> about 80
> lbs but we did find storage space for them. Although we will be  
> getting many
> updated versions, it's good to know what charts we'll need in the  
> first
> place.
>
> Right now we're working on an engine that rapidly heats up (M135  
> Perkins
> Sabre) with increasing RPMs. Using the port engine as comparison,  
> using
> laser hand held temp readers to compare with upper and lower helm  
> station
> gauges. It gets too hot to fast. We have sea chest raw water  
> intake. We've
> changed impellers, changed the raw water pump, cleaned heat exchanger
> (little sea grass), have the right levels of antifreeze in coolant  
> system.
> What now? So, I'm working on other lists to learn more about this  
> issue so I
> can talk semi-intelligently with the mechanic.
>
> Best regards,
> Bob
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