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Replacing impeller on inboard8/29/2023 ![]() ![]() On an inboard engine, the impeller will have to be pulled off the shaft within the housing, so an impeller puller is a great investment if you plan on tackling this job yourself. Impeller replacement on an inboard engine is not a difficult job, but it’s always best to ensure you have new gaskets for the cover as this can cause leaks inside the engine room and may prevent enough water from being pumped around your engine. The first place that pipe gets to on the engine is normally the raw water pump and the impeller is located behind a cover on this pump. An easy way to locate it is to firstly find where the cooling water enters the boat and follow the pipe, it will generally go through a strainer and then head towards the engine. ![]() The location of the impeller on inboard engines can vary, but they will all be housed within the raw water pump. Where is the impeller located on an inboard motor? Our team of boat technicians has the skills and experience needed to service your boat.Replacing the impeller on an outboard engine is an easy enough job, but if you are unsure, it’s probably best to leave it to your boat mechanic as there can be complications with the gear shifting if the lower unit is refitted incorrectly. Staying on top of this boat service can save you thousands of dollars down the road. Let Matson Auto and Marine replace your impeller I haven't run it more than 60 seconds per attempt or run the RPMs past idle. MerCruiser impellers should be replaced every three years. 1 I'm sure this has been asked numerous times but I didn't find it in the forum :facepalm:, Just replaced the impeller and it doesn't seem to want to prime either with muffs or on the trailer sitting at the ramp. Pry the housing loose, and lift it up off the driveshaft. The design of these units extends the life of impellers. Use a socket to remove the nuts on the plastic water pump housing. The one exception to this rule would be MerCruiser systems. It can take a long time to clock 100 hours, so we also recommend that the impeller is replaced every other year for the majority of outboards and sterndrives. Depending on how much you use your boat, impeller replacement should be done based on either hour of operation or years.Īt Matson Point S, we recommend an impeller replacement every 100 hours of operation. The Lombardini engine LDW 2204 M, a high performance diesel inboard marine. How often should a boat impeller be changed?Įven if no abnormal damage is caused to the impeller, it should still be replaced on a regular schedule. Cooling water pump Lombardini Replacement parts compatible with OE numbers. Severe damage may require an engine replacement. When an engine overheats, damage to the head gasket, cylinders, and the engine block is possible. Without a constant supply of cold water, the engine will quickly overheat. If the impeller on your boat breaks or fails, the resulting damage can destroy your engine. If you use your boat infrequently, or if it has been sitting for a few years, the impeller may have become brittle enough to fail on initial startup. Rubber becomes brittle and dry rotted if it is sits for too long. If your boat runs for even a few minutes (or even seconds) without water flowing through the impeller, it will shred and need to be replaced. Rubber impellers rely on water to keep them lubricated. Sand particles are abrasive and can quickly wear out the rubber veins of the impeller. If the body of water you take your boat out on is especially muddy or sandy, the life of your impeller can be reduced. There are a few factors that can speed up impeller failure. Like any moving component, rubber impellers will wear out after years of use. Regular seasonal inspections and replacements can prevent major headaches and expenses down the road. Without the impeller, your boat’s engine will overheat.Īs a boat owner, it’s important to pay attention to the condition of your impeller. That being said, the potential engine damage from a failed impeller is substantial. During operation, water keeps them lubricated and prevents damage. When the impeller rotates, water is sucked into the cooling system.ĭespite being made of rubber, impellers tend to be durable. An impeller is a hub with flexible rubber fins. 8hp based on Pictures may not be the model in stock at the time. Boats use impellers to take in raw water. Tohatsu Nissan Genuine OEM Outboard Motor Part Number 334650210M Impeller (9. Cold water cycling through the system keeps the engine at a safe operating temperature. Most inboard and sterndrive boats utilize a raw water system to cool the engine while it runs. Engine Repair and Maintenance Johnson & Evinrude Outboards Impeller lubricant Cricket Too C Cricket Too Lieutenant Commander Joined Messages 1,732 1 What do you guys use to lubricate the impeller when your changing it. ![]()
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