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Old 02 May 2008, 16:14   #11
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Remove the thermostat and put it in some pretty hot water, if it moves, its fine. If not or it moves very slowly then that could be the source of your problem.
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Old 02 May 2008, 16:32   #12
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Engine: Evinrude etec 115
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1. Check thermostat (remove as stated) or replace (quite cheap).
2. Check guage - is this reading correctly (I had a temp guage fail in a car and it tended to read hot when the engine was in fact at normal operating temperature)?
3. If cooling is okay and guage is correct then you may have a genuine problem with the engine. One possible cause is cylinder head gasket failure. Alternatively you may have a mixture problem.
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Old 09 May 2008, 17:25   #13
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Country: Netherlands
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Engine: 1.7 DTI mecruiser/Cu
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hi all, thx for helping

Today i removed the thermostat. The overheat problem is less, but not gone.
It takes a longer time now untill the temp meter is going in red.
How can i measure the real temperature?

I have a strange propellor. 18d-16P Maybe i should try a 15d-17p.
But an expert says that another prop will not influence motor temp

I am know working on a idea to put a little radiator with fan in the closed cooling circuit.
Its quiet easy to do that (as i suppose now)
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Old 13 May 2008, 05:09   #14
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this may be of interest

this link may be of interest. http://groups.yahoo.com/group/cummin...ser_120hp_DTI/

Ian
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Old 13 May 2008, 10:59   #15
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thx. I allready am a member there.

I seem to be the only one suffering heat problems...
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Old 21 June 2008, 02:59   #16
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Country: Netherlands
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Heat problem solved!

What i did is remove the heatexchanger cap on the front off the
motorblock. 3/4 of the heatpipes where filled with
little 'shell-powder'!!

I bought a 4 mm long metal ash and pushed it through the holes.
After that i flushed the system with fresh water to get rid of the shells.

I fixed this in about 1,5 hour. I hope this will help more people. I
think to do it better every year.

p.s. do you see the three blowers on top? :-)
Did this earlier to get fresh airflow (and cooling)
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Old 21 June 2008, 03:37   #17
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you been running in shallow or silted water?
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Old 21 June 2008, 05:04   #18
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Quote:
Originally Posted by Rogue Wave View Post
you been running in shallow or silted water?
Mostly at a lake with a dept of 1 to 3 meter with sandy bottom.
What you see on the picture is the inheritance from 4 years.
What you don't see at the picture (just forgot) is the picture of the lid (cap?)
This was also 50% filled with permanently grown shells.

Boat is from 2004 and it lies summer and winter in the water.

I am now working on a idea to make it possibility to easily flush the heat exchanger with sweet water from inside the boat.
Later more.
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Old 17 October 2008, 14:31   #19
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Coling problems cummins 1.7 diesel

Antonin/members.
I have an overheating problem on a cummins 1.7 used in a Uttern S64 exactle as described. ( Overheating at higher revs )
What have you Guy's done to resolve this problem ?
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