Tomco
Active Member
- Aug 16, 2012
- 455
- Boat Info
- 2004 420 Sedan Bridge
GHS Hydraulic Lift
11' Walker Bay, 30hp
- Engines
- Cummins 6CTA 8.3M
I have the 496 (closed cooling) with Bravo III's - last week when out the starboard engine hydrolocked. We had idled into a lock and the engine would not start when exiting ... it sounded a lot like a dead battery and as a result of persistent attempts I spun out the starter. Back at the marina the mechanic installed a new starter and on first attempt it locked up again and he recognized it was hydro locked. Turned out there was a little water in only one cylinder. Pulled the offending plug and turned over to blow out the water ... ran fine afterwards. Headed out today and we had the same scenario play out again! I recognized the situation this time and pulled the plug (same cylinder), turned it over to blow out the water and it started right up and lasted fine for the rest of the day (at least 7 starts/stops).
In both cases, we were on plane for about a half hour or so before slowing down to enter the locks - not sure if that is relevant but we only went at displacement speed afterwards and had no problems.
I am thinking that it is most likely the gasket between the manifold and the riser leaking ... would appreciate any any insight from anyone who may have had a similar problem.
In both cases, we were on plane for about a half hour or so before slowing down to enter the locks - not sure if that is relevant but we only went at displacement speed afterwards and had no problems.
I am thinking that it is most likely the gasket between the manifold and the riser leaking ... would appreciate any any insight from anyone who may have had a similar problem.