hi all:
I come once again to the well of knowledge here.
I'm looking for some advice on diagnosing my symptoms and confirmation / suggestions on my course of action.
background.
27' tiara 1987. repowered in 2001 with Mercruiser 5.7 alpha 1 gen 2. with 600 hours and 16 years on motors.
manifolds and entire engines are original 2001 wet joint manifolds in .
I purchased the boat this past april and put 100 hours this season and the motors ran great.
my original plan was to replace the manifolds etc this fall but on my last outing my starboard engine ran hot enough to trigger the overheating alarm when I was running WOT. ( I always run WOT for about 5 minutes every cruise to keep them in shape).
after cooling down the starboard motor ran normal temp and my normal cruise speed but began getting warm if I pushed it.
when the engine overheated I noted the following. both manifolds, elbows, thermostat housing, etc were equally hot, no one spot hotter than another.
the outdrive was fully serviced in July with new OEM water pump, hoses and bellows, oil etc. including new OEM thermostate
after the overheat I noticed a lot of steam coming from the exhaust of the starboard motor.
I've decided to end my season and do the manifolds, etc now.
my question is this. what is the most likely cause of the overheating?
I expect my problem is upstream of the manifolds because the temperatures were equal everywhere. where would you look? and is my thinking sound?
my plan is to replace all manifolds, all hoses, elbows and the water circulating pump and thermostate...and to flush the power steering cooler.
what else should I consider?
thanks for your help
I shut down
I come once again to the well of knowledge here.
I'm looking for some advice on diagnosing my symptoms and confirmation / suggestions on my course of action.
background.
27' tiara 1987. repowered in 2001 with Mercruiser 5.7 alpha 1 gen 2. with 600 hours and 16 years on motors.
manifolds and entire engines are original 2001 wet joint manifolds in .
I purchased the boat this past april and put 100 hours this season and the motors ran great.
my original plan was to replace the manifolds etc this fall but on my last outing my starboard engine ran hot enough to trigger the overheating alarm when I was running WOT. ( I always run WOT for about 5 minutes every cruise to keep them in shape).
after cooling down the starboard motor ran normal temp and my normal cruise speed but began getting warm if I pushed it.
when the engine overheated I noted the following. both manifolds, elbows, thermostat housing, etc were equally hot, no one spot hotter than another.
the outdrive was fully serviced in July with new OEM water pump, hoses and bellows, oil etc. including new OEM thermostate
after the overheat I noticed a lot of steam coming from the exhaust of the starboard motor.
I've decided to end my season and do the manifolds, etc now.
my question is this. what is the most likely cause of the overheating?
I expect my problem is upstream of the manifolds because the temperatures were equal everywhere. where would you look? and is my thinking sound?
my plan is to replace all manifolds, all hoses, elbows and the water circulating pump and thermostate...and to flush the power steering cooler.
what else should I consider?
thanks for your help
I shut down