Hit a sandbar last night...

[Off Line]

We hit a sandbar last night. Trimmed all the way up, churned up a lot of sand and got through it. We never lost forward momentum. Traveling at about 10kts. Sandbar was only about 4 to 6 feet wide. Once clear I lowered the outdrive all the way back down and got up on plane, as we as we got on plane we heard a warning alarm. I started checking gauges and noticed that the temp gauge was at about 210,220 degrees. I immediately backed off the throttle turned on blowers and shut the engine off. She usually runs about 160 degrees. She never started smoking or anything else. Im guessing that the impeller is the only thing clogged???? Thoughts comments and or help would be great. We just got her back in the water this past Monday after a long weekend of barnacle scrubbing and bottom painting. Thank you in advance for your time and any help you can provide.

Steve.

[wcphillippi]

sounds like the impeller, what drive/engine?

[mmwjr]

Most likey destroyed the impellers. There may be deap scratchs in pumps where the impellers rub. Could also be clogged raw water inpts on the drives (packed sand).

What engine and drives do you have?

[jrsick]

I second the clogged raw water inlets. Good place to start anyway because that was point of contact.

[Phillbo]

On plane at night in an area with sandbars is pretty risky.

[Off Line]

Mike, we have a 7.4 mercruiser with the bravo 3 outdrive.

[Off Line]

7.4 mercruiser with bravo 3 outdrive.

[Phillbo]

Did it finally clear and start running at the right temp? I'm going with the clogged intakes but you may want to pull the impeller and inspect for damage or simple replace it.

[mmwjr]

Been away having a good time on the water.

OK so BIII, therefore the raw water pump is inboard. Yu can pull te pump and inspect the impeller witht he boat in the water, either way I would replace it. Once replace leave output hose off and crank engine to see if water is being pumped (just a second or 2). If you have water reconnect hose and run engine to check if temp is Ok, else you have a clogged inlet.

[shrew]

I'm going to guess that there are actually two problems here. Clogged intake ports restricted or blocked water intake, which in turn burnt out the impeller. I'd clean out intakes, flush the system, then replace the impeller.