Eric, You didn't say what engine.
I've had a couple issues that might be helpful. On launch a couple years ago, there was no raw water flow. Fortunately my slip was mere feet away and I got the boat docked. On investigation, I traced the problem to pluggage in the raw water inlet upstream of the strainer. I had to use dock water to blow it out the thru-hull. Never did see what it was. Mud dauber nest? Practical joker stuffing something up the thru-hull while the boat was one the hard? No clue. The other issue is related primarily to Universal/Westerbekes that have a zinc in the heat exchanger. I had to pull the end caps and remove several pieces of pencil zinc in the exchanger. See: https://marinehowto.com/westerbeke-universal-marine-heat-exchanger-cleaning/ The engine began to slowly overheat at higher rpm's. Once I removed the zinc pieces, the temperature returned to normal. Dennis C. Touche' 35-1 #83 Mandeville, LA On Wed, May 30, 2018 at 12:46 PM, Eric Frank via CnC-List < cnc-list@cnc-list.com> wrote: > Never had trouble with this before, but this year I could not get the raw > water going out the exhaust when I was getting ready for launching. Always > use a bucket of fresh water on the intake to the raw water pump (new > impeller every year) just to make sure things are working. Engine started > fine but no water out the exhaust. Impeller was turning when I cranked the > engine so thought the problem might be downstream of that. A mechanic at > the yard reported back that things were fine and he just had to run the > engine at a high RPM to get the raw water flowing. Anyone else experience > that? Does it suggest that the tubes where the raw water cools the engine > water could be getting clogged? Advice appreciated. > > Eric Frank > Cat's Paw > C&C 35 Mk II > Mattapoisett, MA > > > _______________________________________________ > > Thanks everyone for supporting this list with your contributions. Each > and every one is greatly appreciated. If you want to support the list - > use PayPal to send contribution -- https://www.paypal.me/stumurray > > >
_______________________________________________ Thanks everyone for supporting this list with your contributions. Each and every one is greatly appreciated. If you want to support the list - use PayPal to send contribution -- https://www.paypal.me/stumurray
