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Running Cold
This A4 is in a C&C 27 on Lake Champlain where the water can be as cold as 45 degrees at launch time and at most 70 in the summer. I have had the boat for 4 seasons and done a lot of engine maintenance including rebuilding the water pump and installing the Moyer low cost thermostat and spacer. Unless you push the engine so that boat is trying to go beyond hull speed, probably about 2000RPM the temp gage hardly moves.
The water pump kit included a new "shoe?" to increase flow. I installed this and possibly it was after that that the running cold situaiton started. I did this change and others over the winter so I can't be sure. Would the increased pump pressure and flow be causing water to bypass the thermostat? This is the only reason I can think of for this. Should I go back the old pump set-up"" I am thinking of buying an entirely new pump and using the old one as a spare. Would the new one be highflow/pressure? The engine runs fine, with Don's hotter plugs the plugs stay clean but around the edge there is some soot build-up. Thanks Last edited by Tom Graham; 02-14-2009 at 09:31 PM. Reason: Grammer/spelling |
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