Water intrusion in engine compartment

W'EYE NOT

New Member
Oct 28, 2008
27
Chesapeake City, MD
Boat Info
1999 45 EB
Engines
Cummins 450 8.3L
We have a 450 Express Bridge. Water seems to get into the engine compartment on both the Starboard and Port side that do not drain into the bilge and need to be pumped out. This happens after a rain but cannot find the source. Water collects above the prop shaft towers and along the side of each engine.

Each time it needs to be pumped into the bilge to exit. The last time after a heavy rain it roughly amounted to 25 gallons per side. Any experience with a similar issue and a lead on where to find the source?
 
We have a 450 Express Bridge. Water seems to get into the engine compartment on both the Starboard and Port side that do not drain into the bilge and need to be pumped out. This happens after a rain but cannot find the source. Water collects above the prop shaft towers and along the side of each engine.

Each time it needs to be pumped into the bilge to exit. The last time after a heavy rain it roughly amounted to 25 gallons per side. Any experience with a similar issue and a lead on where to find the source?


Did you ever figure this out?

I ask because a friend recently purchase a 440 Express Bridge and it looks like rain water it is accumulating in the engine room under the shaft on the port side. There is a stringer that is not allowing the water to drain to the middle of the bilge to the pumps. We want to figure out how the water is getting into the ER, but didn’t they drill and glass holes in the stringers routing the water to the bilge pumps?
 
I have a 99 450 EB and had the same issue. For some reason, there are small holes in the corners of the trough where the big engine hatch sits. I caulked this gap in the cockpit floor and that solved most of the leaks. Have someone with a flashlight go in the bilge and hose water over the cockpit floor and look for leaks.
 
Similar problem on my 500, although i do have drain holes. After setting up some cameras during a rain storm i found that i had water dripping from the blower motors. Looks like blowing rain was entering thru the blower discharge opening in the side vents, running down the hose and out of the weep hole on the blower motor housing.
 
Did you ever figure this out?

I ask because a friend recently purchase a 440 Express Bridge and it looks like rain water it is accumulating in the engine room under the shaft on the port side. There is a stringer that is not allowing the water to drain to the middle of the bilge to the pumps. We want to figure out how the water is getting into the ER, but didn’t they drill and glass holes in the stringers routing the water to the bilge pumps?


A lot of boats do not have weep holes in the area under the engines so that if there is a major fluid leak from the engine or trans, it can be contained from leaving that area, and getting to the bilge pumps where it would be pumped and pollute overboard without owner knowing
 
A lot of boats do not have weep holes in the area under the engines so that if there is a major fluid leak from the engine or trans, it can be contained from leaving that area, and getting to the bilge pumps where it would be pumped and pollute overboard without owner knowing


The engines as well as pods are isolated from the “pumpable” sections of the bilge on our Sabre.
 

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