Raw Water Engine Cooling - Need a Strainer?
 

I've got a raw water cooled inboard that ran fine for ten years with
no strainer. I installed one a few years ago and was amazed at the
crud it caught. Not sea creatures, etc., but scale and rust from the
cooling galleries in the block.

Raw Water Engine Cooling - Need a Strainer?
 

Mark wrote:

I've got a raw water cooled inboard that ran fine for ten years with
no strainer. I installed one a few years ago and was amazed at the
crud it caught. Not sea creatures, etc., but scale and rust from the
cooling galleries in the block.

Neat, now put it on the inlet side and you can catch sea creatures.

Rick

Raw Water Engine Cooling - Need a Strainer?
 

On Mon, 03 Nov 2003 03:19:12 GMT, Rick
wrote:

Mark wrote:

I've got a raw water cooled inboard that ran fine for ten years with
no strainer. I installed one a few years ago and was amazed at the
crud it caught. Not sea creatures, etc., but scale and rust from the
cooling galleries in the block.

Neat, now put it on the inlet side and you can catch sea creatures.
================================================== ===

Yep

Raw Water Engine Cooling - Need a Strainer?
 

Rick, Wayne, and all, thanks for the comments
and especially for the links. Still deciding what
will work for us and fit where we need it to.


"Wayne.B" wrote in message
...
On Sun, 02 Nov 2003 19:17:00 GMT, Rick
wrote:
It is cheap insurance and good practice to place a strainer between the
seacock and the raw water pump.

The strainers shown here by Groco are excellent for your application as
they allow visual inspection and are easily cleaned:

http://www.depcopump.com/catalog106/PAGE56.PDF

================================================== =====

I agree with the inboard strainer recommendations. My boat has Perko
strainers. They work well and are easy to clean.

http://www.cgedwards.com/Perko/pko21.html

Raw Water Engine Cooling - Need a Strainer?
 

Neat, now put it on the inlet side and you can catch sea
creatures.

Um, it's a thermostatically controlled open loop cooling system. The
raw water is circulated through the block, when operating temperature
is reached the thermostat opens and some water exits through the
exhaust elbow, and is replaced through a one way valve from the intake
through hull. The volume of water pumped through the block is
constant at a given RPM, and its temperature is constant. The
strainer is in the loop, just before the water pump, per the engine
manual specifications.

The amount of water entering and leaving the system is a function of
the surrounding water temperature and how hard the engine is working
(throttle setting).