PlayDate
Well-Known Member
The way a riser gets that hot is when the water flow to it goes to almost zero. You see white "smoke" coming out of the exhaust and the engine noise gets loud. Within a few minutes....the exhaust hoses will melt and ignite along with their fiberglass components.
From what you have said.....you came very close to an exhaust meltdown which could have become catastrophic for you and your family.
I almost lost a dockmate to a very similar situation (42 Express with diesels).....bad impeller lost water flow at cruise...caught the exhaust hoses on fire...opened the hatch to see what was going on....halon deploys....fire continues to burn....he jumps in 45 degree water and watches the boat burn and sink.
Fortunately he was rescued (by a bass fisherman) before he succumbed to hypothermia.
You and your mechanic need to find out why that riser is getting that so hot. It should be within 10 degrees of the other riser. I'm guessing it is related to a undiscovered blockage or raw water pump problem.
From what you have said.....you came very close to an exhaust meltdown which could have become catastrophic for you and your family.
I almost lost a dockmate to a very similar situation (42 Express with diesels).....bad impeller lost water flow at cruise...caught the exhaust hoses on fire...opened the hatch to see what was going on....halon deploys....fire continues to burn....he jumps in 45 degree water and watches the boat burn and sink.
Fortunately he was rescued (by a bass fisherman) before he succumbed to hypothermia.
You and your mechanic need to find out why that riser is getting that so hot. It should be within 10 degrees of the other riser. I'm guessing it is related to a undiscovered blockage or raw water pump problem.