ColdHardMetal
05.05.2021 23:07:22
Your boat’s motor requires a steady flow of water to keep it cool, so if the impeller fails, your engine will be unable to pump cool water causing it to overheat which in turn can cause permanent damage.
See full version: How often should the impeller on a boat be replaced
Your boat’s motor requires a steady flow of water to keep it cool, so if the impeller fails, your engine will be unable to pump cool water causing it to overheat which in turn can cause permanent damage.
Enjoy your new-found knowledge on boat impellers, and cheers to another great boating season. [links]
How often should the impeller on a boat be replaced? It is recommended that a boat impeller be replaced every two to three years or 300 hours, whichever comes first. However, it is suggested to also visually inspect your impeller at the beginning of each season for any signs of wear or damage.
Several things related to your mishap come to mind. First, in the photo you show a rubber pump impeller that clearly has some of its blades missing. This can be a problem because unless you know exactly where those blade parts are, you could be at risk. They can and will circulate through your engine’s cooling system and could end up blocking a critical cooling passage inside the engine. To avoid further problems, you need to find these pieces and remove them from your cooling system. here
This rubber pump impeller clearly has some of its blades missing; tracking down the missing rubber is a top priority after overheating. more
Question: Recently I was running along at cruising speed and suddenly the overheat alarm on my boat sounded. Fortunately I was not too far from my slip at the marina and we were able to nurse the boat back into its slip OK. After some inspection we discovered that the impeller in my water pump was shot (see photo). I’ve replaced the impeller and have run the engine and things seem to be back to normal. Am I missing anything?
With either the outboard or inboard installation, after a severe overheat, the thermostat should be replaced as they are quite frequently damaged during an overheat event.
What you can’t see might cause further problems if not addressed right away, says Ed Sherman.
If you are at an office or shared network, you can ask the network administrator to run a scan across the network looking for misconfigured or infected devices. here
If you are on a personal connection, like at home, you can run an anti-virus scan on your device to make sure it is not infected with malware. more
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Question: My Mercruiser Marine Engine suddenly started overheating to the point I’m afraid to run the engine. I watched your video on replacing the water pump impeller and in fact narrowed my problem down to a failed water pump impeller on my 807151A14 water pump impeller. However after replacing the impeller the engine is still overheating. Did I miss something when replacing the water pump impeller? more
Response: This is a very common situation however its very important to understand why. This is probably one of the most common situations a marine mechanic faces while addressing marine cooling system related problems. It can be described like the chicken and the egg scenario regarding whether the failed impeller causes the overheat or the lack of water flow/overheat causes the impeller to fail. Regardless of which happens first the result is always the same; a failed water pump impeller.
Conclusion: Whether you have an impeller fail which then leads to overheating or you have a blockage in the cooler that leads to impeller failure you should always check the complete inlet and outlet flow paths to ensure there is nothing blocking the system from good water flow into and out of the water pump. [links]
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