BF150 water in lower cylinder
#1
12-12-2019, 10:11 AM
BF150 water in lower cylinder
I have twin 2008 BF150s with low 320 hours, Its a salt water dive boat in Key Largo Florida it only goes about 15 miles round trip to the reef. It's rinsed always after it's stored on its lift.
I was gone about 3 months and when I ran the boat for about 30 minutes one of the engines started running poorly and I shut it down and came back to dock on one engine.
I pulled out the plugs and found water in the lowest cylinder.
I checked water separator and no water was found.
I did a compression test on all cylinders and got 205,205,192,205 top to bottom. Pressure would hold in all four at those levels.
Once I dry out the cylinders and replace the plugs, they all get spark.
When I run the engine out of the water, all cylinders fire and the engine seem okay except cant run long because no cooling water.
As soon as I put the engine in the water and start it up the bottom cylinder gets water in it again and stops firing.
The analyzer returns no codes.
Could this be a problem with the exhaust manifold? Getting and holding pressure on all 4 seems to negate a head issue. Where can the water be coming from if not through exhaust somehow?
I am at the limit of my know how. I need some guidance before tearing this engine down.
I was gone about 3 months and when I ran the boat for about 30 minutes one of the engines started running poorly and I shut it down and came back to dock on one engine.
I pulled out the plugs and found water in the lowest cylinder.
I checked water separator and no water was found.
I did a compression test on all cylinders and got 205,205,192,205 top to bottom. Pressure would hold in all four at those levels.
Once I dry out the cylinders and replace the plugs, they all get spark.
When I run the engine out of the water, all cylinders fire and the engine seem okay except cant run long because no cooling water.
As soon as I put the engine in the water and start it up the bottom cylinder gets water in it again and stops firing.
The analyzer returns no codes.
Could this be a problem with the exhaust manifold? Getting and holding pressure on all 4 seems to negate a head issue. Where can the water be coming from if not through exhaust somehow?
I am at the limit of my know how. I need some guidance before tearing this engine down.
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