Just repowered this spring. Mechanic out of town for a week so I thought I'd seek an opinion
Did first shake down run this week end. Trying to break in correctly...running at various RPM's, nothing less than 1500 and nothing more than 3800; although I did hit WOT (4700) for about 5 seconds to make sure prop/engine aligned
After approx. 30 minutes of varying RPM's (most of run was at 3200-3400) the "alarm activated" although the temp gauge was at 175. I immediately shut down, checked oil and drive oil...everything good. Starboard manifold very hot, port manifold hot.
Called for a tow to slip after the almost 3/4 hour to dock, temp was down to 135. Started engine and limped into dock and tied up (no more than about 3 minutes)...no alarm
Came back yesterday AM, started cold engine and ran at about 2200 RPM with no load....obviously temp gauge went up to just below 175.....both manifolds initially were cold and seemed to be getting circulated water.....as engine ran for approx. 15 minutes or so, the port manifold still remained cold, but the starboard started to get very warm...no alarm...it looked like thermostat did kick in as the temp dropped slightly on gauge, built back up and then dropped again...starboard still very warm and getting warmer (Gauge may be suspect..it is 10 years old and I plan on replacing this week)
I did reach mechanic by phone....obviously he wasn't able to fully diagnose...first he thought I picked something up on out drive....no I checked...and.I wasn't in shallow water so I shouldn't have picked up any mud.....then he thought it might be pump (although this is allegedly brand new)
Mechanic indicated to me that he put in new manifolds (and the risers were only 1 year old and good) when he re-powered and new outdrive pump
If it was a pump failure, why would one side seem to be getting water and no the other..it would seem obvious if I "picked up" something on the outdrive, it would have cleared and both sides would be flushing properly
I'm no mechanic and I'm stumped
Any one run into this before or have any ideas...I don't want mechanic chasing ghosts...he wants to pull and look at outdrive pump and put in a lower temp stat...said he might need to put a second cooling system in with a through hull scoop fitting...I've never needed this before,,,the boat is 14 years old and the standard outdrive cooling system has been fine in past.....boat is a Trophy 25" W/A I/O Alpha drive
Thanks
Did first shake down run this week end. Trying to break in correctly...running at various RPM's, nothing less than 1500 and nothing more than 3800; although I did hit WOT (4700) for about 5 seconds to make sure prop/engine aligned
After approx. 30 minutes of varying RPM's (most of run was at 3200-3400) the "alarm activated" although the temp gauge was at 175. I immediately shut down, checked oil and drive oil...everything good. Starboard manifold very hot, port manifold hot.
Called for a tow to slip after the almost 3/4 hour to dock, temp was down to 135. Started engine and limped into dock and tied up (no more than about 3 minutes)...no alarm
Came back yesterday AM, started cold engine and ran at about 2200 RPM with no load....obviously temp gauge went up to just below 175.....both manifolds initially were cold and seemed to be getting circulated water.....as engine ran for approx. 15 minutes or so, the port manifold still remained cold, but the starboard started to get very warm...no alarm...it looked like thermostat did kick in as the temp dropped slightly on gauge, built back up and then dropped again...starboard still very warm and getting warmer (Gauge may be suspect..it is 10 years old and I plan on replacing this week)
I did reach mechanic by phone....obviously he wasn't able to fully diagnose...first he thought I picked something up on out drive....no I checked...and.I wasn't in shallow water so I shouldn't have picked up any mud.....then he thought it might be pump (although this is allegedly brand new)
Mechanic indicated to me that he put in new manifolds (and the risers were only 1 year old and good) when he re-powered and new outdrive pump
If it was a pump failure, why would one side seem to be getting water and no the other..it would seem obvious if I "picked up" something on the outdrive, it would have cleared and both sides would be flushing properly
I'm no mechanic and I'm stumped
Any one run into this before or have any ideas...I don't want mechanic chasing ghosts...he wants to pull and look at outdrive pump and put in a lower temp stat...said he might need to put a second cooling system in with a through hull scoop fitting...I've never needed this before,,,the boat is 14 years old and the standard outdrive cooling system has been fine in past.....boat is a Trophy 25" W/A I/O Alpha drive
Thanks
