Your boats impeller is a series of rubber vanes molded around a center brass hub. The impeller itself is simply a series of rubber vanes molded around a hub.
With the info you have a competent pump guy can use the charts to pick an impeller for the boat that runs near your engine peak hp rpm at WOT which would be a good place to start.
Where is the impeller on a boat. The impeller may also stick to the housing and come apart when the pump starts. Impellers are damaged by debris that get sucked in by chemicals and especially by running dry. All it takes is a plastic bag blocking the raw water inlet or a seacock left closed when you start your engine and your impeller will soon be a shredded mess.
I walk you through the whole process to changing out your impeller. This boat that I am using is a 1999 Ski Nautique with the Ford Pleasurecraft PCM 58-li. Inserting the new impeller into the pump is also often difficult and takes some practice.
You basically have to compress and squeeze the blades as you twist the impeller into the pump preferably in the direction of turn by the engine until the splines on the shaft engage with the impeller hub. Its good outboard maintenance pr. Your boats impeller is a series of rubber vanes molded around a hub.
The tips of these flexible vanes can wear out for many reasons due to simple use or if the boat is in sandy water. Abrasive sandlike material can cause the impeller to wear out faster. The impeller itself is simply a series of rubber vanes molded around a hub.
The vanes are flexible and the hub rotates on an eccentric within the pump housing which has a stainless steel liner. The tips of the impeller vanes can wear out from simple use but if the motor is often run in silty or sandy conditions this abrasive material can accelerate impeller wear. I like to change my raw-water impeller every winter no matter how little I may have used the boat during the season.
This is largely a preventive maintenance issue and I then can relax knowing that when the boat goes back into the water the water pump is in tiptop condition. The larger the impeller the more water rides on the blades and therefore the more engine power is absorbed by the impeller. This is why a larger impeller will turn less peak rpm in your jet boat than a smaller diameter impeller.
As the name indicates these impellers are closed on both sides. They have a single casing within which you will see the vanes. They are highly efficient and are required for huge pumps.
If the motor ceases to produce a steady stream of water after reaching its normal operating temperature the impeller is one of the two most likely causes. If you just took your motor out of extended or winter storage check the cooling water outlet located at the bottom rear of the motors top cowling. All across the US wasps like to winter in there for some reason.
Its pretty much impossible to say which impeller will make the boat fastest with absolute certainty. Youll never know until the boat is in the water. With the info you have a competent pump guy can use the charts to pick an impeller for the boat that runs near your engine peak hp rpm at WOT which would be a good place to start.
If you find the rpm is way below your peak hp rpm and youre leaving a ton of power on the table then the shop can keep on trimming the impeller smaller to gain. Impros is a Personal Watercraft Impeller Repair and modification service. We specialize in one thing- the watercraft pump.
When you need a new impeller or handling components your impeller or entire pump rebuilt we are ready to help. Many of our customers use us for special pplications or custom impeller work. If you notice the impeller box does not say Westerbeke on it.
Westerbeke uses a Johnson pump on this particular engine and Hamilton Marine stocks the exact impeller kit for it. They may for your engine too. The impeller on the left is the brand new one and the one on the right was removed last fall after winterizing the engine.
Find the Impellers Parts you need today. Great service low prices fast shipping. An impeller is a rotating component of a centrifugal pump that accelerates fluid outward from the center of rotation thus transferring energy from the motor that drives the pump to the fluid being pumped.
The velocity achieved by the impeller transfers into pressure when the outward movement of the fluid is confined by the pump casing. Your boats impeller is a series of rubber vanes molded around a center brass hub. The tips of these flexible vanes can wear out for many reasons such as.
Sandy water run without water or a plastic bag smothering the water intake port. Water lubricates the impeller and if its run dry the impeller can be ruined in a few seconds. Your boats impeller is a series of rubber vanes molded around a hub.
The tips of these flexible vanes can wear out for many reasons due to simple use or if the boat is in sandy water. Abrasive sandlike material can cause the impeller to wear out faster. This is true I had to do this in a friends boat once that didnt carry a spare impeller with him.
If you remove the old impeller and get the boat to about 10-20 MPH there is enough water forcing into the intake so you can drive the boat to the trailerdock and keep the boat in operating temp range.