I have an 1981 38' with 671's. I feel your pain! My starboard engine has hydrolocked several times. I have replaced the exhaust risers, installed exhaust flappers and have initiated the practice of holding the stop button in for at least five seconds after the engine stops running. I have been told that the problem is that the 671 can run backwards for a second or two if the fuel is not totally shutoff. I am not sure which of these solutions really cured the problem but I have not had it happen again. I now have corrosion in number six and a bent rod. Even with all that it ran fine all summer. I ran it about 400 hours. It just smoked a lot when the engine was cold. The boat is out of the water in Sitka for the winter and I have a mechanic that is going to replace the cylinder lining and the rod .... probably the piston too. What a hassle!
-----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Michael McCartney Sent: Saturday, October 03, 2009 5:11 PM To: [email protected] Subject: [UnifliteWorld] Re: HYRDOLOCK for the 3rd time 1978 38' Uniflte w 671 Nauturals Are these 671's? -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Alexander Halperin Sent: Saturday, October 03, 2009 12:28 PM To: [email protected] Subject: [UnifliteWorld] HYRDOLOCK for the 3rd time 1978 38' Uniflte w 671 Nauturals Port engine hydrolocked for the 3rd time. Occurred on shut down in calm waters of Avalon Harbour after a 5 minute run to put aboard fresh drinking water. Engine seemed to run for a second or two, then abruptly stopped and locked. New higher exhaust risers had been installed on both engines after previous hydrolock occurrence 10 years ago. Previous 2 episodes had also occurred on shutdown, but in heavy swells after a long run. Why is this happening? alex --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "UnifliteWorld" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/unifliteworld?hl=en -~----------~----~----~----~------~----~------~--~---
