9. Plumbing, Fresh Water Boat Install the new key which sits in the flat on the shaft. Furniture, Boat Seat Pedestals & Protection, Ladders, Steps, & You can use muffs on the water pick up but the pressure of the hose tends to force the water into the engine, running it in a barrel ensures that the suck from the pump is correct. Note that there should be a healthy spout of water coming out from the telltale in the engine housing. This is not that strong a material and it is easy to strip out the threads by overtightening. We need to remove Most of the new instruments for boats are now coming out with NMEA 2000 ( National Marine Electronics Association) as thepreferredmethod Mark Corke has just recently posted about an outboard water pump service. Before reinstalling the pump clean up all the mating surfaces to Incidentally, in case it makes any difference, the shaft on this pump is centered in the housing, not off center. Lights, Boat Trailer The face plate of a water pump is considered another wear item. Tops, Other Refill the gearbox with the correct oil. We are looking for the unusual; the new or different technique; or boat improvement project or product that others may find useful. Motors, Fishing Downriggers & NOTE: Globe impellers are reportedly able to run dry for short periods of time however I have had two Globe impellers spin the hub and stop pumping completely. Boat Repair, Boat Paint & The first thing to do is to slide off the seal Working thoroughly and methodically he did the Biminis, View Insurance, Boat Use a heavy rubber band or loop of light line to collapse the impellers vanes, insert it, and pull the loop our with your pliers. I always recommend keeping at least one fully new replacement impeller on board at all times and a minimum of two gaskets. Next install the new bottom plate (shown) that comes in the pump kit, we used a little more gasket cement before dropping this on. Parts, Rule 1500 GPH Automatic Press the constricted impeller into the pump housing. Shelters, Boat Thats an easy answer. The internal reinforcing wire is severely corroded and rotting through the jacket as evidenced by the white residue and bulges. Axles, Boat Trailer Tie I found some more on this website: http://www.nauticexpo.com/boat-manufacturer/impeller-pump-18202.html. Screws, Boat Handles, Pulls, Starters, Marine Solar Power Failing that you should be able see the shadowing of the cam on the cover and figure out the orientation. That is not by design but rather dumb luck Sometimes you get lucky! mallet. off the larger bits of old gasket and sealant, then some fine emery paper will Locks, Boat Deck Boat, Sell A If there is While the concept of water pumps is the same across brands the method of how the impeller sits on, or is attached to the shaft may be different. If your impeller matches one of the silhouettes, you can then measure the depth (See Chart A), identify the drive (See Chart B) and select the material. I pay $16.00 for the impeller in our Westerbeke and it takes about 8-10 minutes to change it. Supplies, Boston Whaler, 1972-1993, You only need enough to have skim coat on the surfaces. Impellers dont like to be run dry and they dont like heat. The impeller is a vital component of your engine's cooling system. Now, Shop I have to replace the impeller on the water pump on a 60HP 1989 Mariner. Little chunks of rubber can migrate into the heat exchanger or the engine and cause overheating damage.
There are several ways to determine the West Marine model number for a replacement Jabsco impeller: Use neoprene impellers for engine cooling, and for fresh and salt water transfer duties. A lifetime supply of it will run you about $3.00 at any drug store. Meters, Marine Electrical Panels Boarding, Paddles & Caulking, Marine Engine Holders, Cabin Accessories & In addition to the impeller all the parts that are required for a routine service; gaskets, O rings and seals are included in the kit. Note: Only a member of this blog may post a comment. Dollies, SportsStuff Great Big The correct Jabsco number for a replacement impeller can also be determined according to the number of blades, diameter (Dimension A), impeller depth (Dimension B) and shaft diameter (Dimension C). Accessories, Electronic Navigation Maintenance, Fiberglass & Epoxy Then, remove the pump's end cover screws and take off the cover and gasket. If its scored and worn you should replace it or flip it. After cleaning up everything reassembly can start. & Live Bait 7. Copyright 2019 IBOATS. Rafts, Paddle acceptable however.
Once a crack opens up the battle is won and you can insert If you run your impeller dry, or even with restricted flow, at least check on it. Avoid using an open ended wrench, if you round You can change your cookie settings through your browser. To install the impeller lube the entire exterior with glycerin. Blocks, Marine Maintenance, Boat Cleaners & If your impeller had vanes pointing in different directions when you took it out, as the photo of the old one shows, DONT WORRY. Neoprene is suitable only for pumps where small amounts of oil or diesel fuel are present. It provides for start up lube and then washes away. If its bad, as mine was, replace it. in so no cement is required or should be used. Deals, Boat Seats Do no use oil or silicone which can attack the composition of the impeller and lead to premature failure. If your pump sits for months with the impeller in one position with the blades on one side bent, it may take a set and may blow a circuit breaker on startup (if its electrically driven). The most complicated aspect of the task is physical access to the pump. Smear a little engine spline coupling grease onto the top of the drive shaft. 1. Professionals, Shop Covers, Boat Cover get to work on the pump proper. 2. the upper oil level plug too which allows air into the gearbox and ensures that High Back Reclining Helm Seat, Cabin and Detectors, Binoculars & 6. Oars, Wakeboard, Wakesurf & Note the old impeller on the right next to the new one Combos, Fishing Tools & Sure, I could buy this impeller through Westerbeke but it costs almost $38.00 vs. $16.00 at Hamilton Marine and they are identical right down to the embossed Johnson part number on the impeller itself. the castings of the mating surfaces. Separate the housing and slide it up the shaft. Covers, Other Ballast pumps, used on boats that tow wakeboarders, have unique requirements, needing to reverse direction and withstand systematic abuse. Inboard and sterndrive engines usually include a flexible impeller type raw water pump. & Sonar, Trolling 5. almost all outboards have four nuts holding this in place. Financing, Iboats I would guess I probably had another 5-10 hours before this one started throwing chunks. Please make a donation, thats all we ask. Hardware, Boat Cabin Towers, Tow Ropes & Heres your guide to choosing the right impeller for your application and how to get the installation done. Tables, Minn Kota Grills, Boat Drink This is the impeller kit I use in my engine. Software, Digital So why is this impeller already cracked and ruined? Various boat projects and ideas related to boating in general. Tighten the cover in a cross orientation - like you would the wheel of a car. Kits, Seadog Stainless Steel Cup Of course, you should check the wet exhaust on your transom for the proper flow of cooling water each time you start the engine. Covers, Boat Shrink Wrap Tubes, Shop AN Cushions, Lexington Dont use a screwdriver to lever it out, as this may score the soft bronze of the pump body and cause leaks. Tops, Bimini Top This helps ease the impellor in but also acts as initial lubrication as the pump will not be full of water during initial startup. Harware, Marine Nuts, Bolts, & Parts, Sacrificial Anodes & PFDs, Roof Racks, Carriers, Galley, Barbeque Battery Charger, Marine Audio & You should check the impellers condition during Spring Commissioning and every 200 hours of operation. Note that contrary to what you might expect the oil is forced in from the bottom until it comes out of the upper level hole, then both screw plugs can be replaced with a new washer under each. The text will normally be the right way up showing how it is orientated. Beginners Guide to Raymarine's Seatalk and Derivatives, Beginners guide to Nmea 2000, Nmea 0183, and bridging, Water Pump Impeller Replacement on Mercury Outboard, Replaceing Raw Water Impeller on a Yanmar. Outboards, Shop 4. All, Anchor & The vanes should be straight, they develop a set to them after How do I determine which way to curve the blades when I put the new impeller in the housing? I look at it this way, impellers are cheap insurance. Trolling Motors, Shop I took the old impeller out and failed to notice which way the blades were curved, and there appears to be no difference between the "top" side or "bottom" sided of the impeller.
Instruments, VHF Radios & Loosen and remove the nuts that hold the lower unit in place, Bilge Pump, Tires, Rims, & Hub This is rather normal and is due to the little bit of back spin a diesel can develop as it shuts down. Accessories, Big Jon Waxes, Boat Cleaning Ropes, Boat Galley, Covers and When the impeller is out, examine it closely. often get stuck in the threads, if they do not come off with the screw you may Please email us at solaceadventures at gmail dot com to tell us about something you might have, to put on our blog site.
I was very surprised that only a few minutes of restricted flow caused this type of damage. Ive replaced impellers on very large Detroit diesels, Cummins, Caterpillars and even one lung teeny tiny Yanmars and all of those impellers went back in fine without a zip tie pre-compressing it. All rights reserved. This is a wire reinforced hose that was very close to failure. For transferring diesel fuel, use a sliding vane pump like the Jabsco Vane Puppy or Groco Flo-Master. I like to insert two machine screws and lay the gasket over them before installation of the plate. Boats, Propeller Parts & IMPORTANT: Please do not use petroleum based greases or oils as lubes nor use silicone grease. Its always good to know what your pump looks like before taking it apart so you can have the right tools on hand. Platforms, Slide whole project in less than an hour so a competent owner should be able to do which sits atop the pump housing. Once you have done this apply some impeller lube, AKA glycerin, to your finger and lube up the inside surfaces of the pump body including the back wall as it too is part of the impellers sealing surface. The gasket is asymmetrical so if something looks wrong you may have it upside down. have to pick them out with a small screwdriver or other tool. Do not hit the flange cavitation plates at the sides or they are sure Fenders, Boat Trailer Please help to keep MarineHowTo.com a, Copyright 1994 - 2019 Compass Marine Inc. | All Rights Reserved. My Westerbeke face plate is embossed with a part number and can not be flipped. Maintenance, Pumps and If petroleum jelly is not available applying a lavish amount of dishwashing detergent will do the job. to that but all outboards are very similar and although the pictures may not We were motoring back in zero wind on a spring tide day. You can install the gasket using any method that gets the gasket in the right place without ripping it, as that is all that really matters.. Please dont beat yourself up over vane direction, it simply doesnt matter.. Deals, Dealer a broad screwdriver and carefully pry it apart being very careful not to damage Biminis, RV & Trailer For easiest removal (or where the above tools dont work) use an Impeller Puller Tool. Re: Which Direction to Curve Water Pump Impeller Blades, CREATE To aid the gasket in making a good seal I sometimes use HondaBond 4 (do not confuse HondaBond 4 with HondaBond HT which is silicone). Holder, Anchor & Dock
You really do not need to over think the re-insertion just do it. There will be water remaining in the HX and hoses. Changing an impeller, on many engines, usually takes less than 20 minutes even if you are fairly slow. Smoke Let the oil drain Be sure to remove all traces of the previous gasket from both the pump body face and the cover plates mating face. Accessories, Marine Electrical Downs, Couplers, Mounts, For a better experience, please enable JavaScript in your browser before proceeding. IMPORTANT: Before you tackle this job be sure to CLOSE THE ENGINE INTAKE SEACOCK before prying off the plate or attempting to change the impeller. I kept a close watch on my water temp and it only went up about 8-10 degrees above normal before we got to the mooring. Acessories, Fishing Outriggers & Unscrew the as you move onto the next step. Riptide Terrova 80 Trolling Motor w/i-Pilot & Bluetooth, Inflatable Wipe down with some clean rags when you are finished. to break, a few taps on the after end of the gearbox unit as shown here are Raw water impellers are a wear item unfortunately they do not always abide by a time or hours of use schedule. Make Parts, Wash Down Zincs, Generator
Dont get alarmed if water drains out after you pop the cover plate off. any doubt as to the condition of the housing then it should be replaced. You are using an out of date browser.
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. so had a proper jig on hand which is ideal but you may have to prop it upright We ran the engine in a barrel to make sure all was well. If you buy an OEM impeller directly from Yanmar, Westerbeke or Universal, to name a few, they usually come with the right gasket. Step 2: Pry the cover plate off. There are small washers under each screw head which Finding all the missing impeller bits is important in order to prevent further damage or overheating issues. I keep the old ones, that are in good condition extra spares. certainly be stiff to undo. Biminis, Paint and Clean out the interior of the pump housing checking to make sure that there Video, GPS Chartplotters &
Boat, Boat Buyers Don't forget to help us by sharing your own experience. Slide the new seal down over the shaft until it just rests against the pump housing. But if you happen to have a perfectly round cover, and it is not obvious, look for any writing or branding on it. By continuing to use this website, you're agreeing to our Privacy Policy and Terms of Use. Adam swears by Permatex Form a Gasket sealant liquid but carefully. If run hot for too long they can throw a blade or lose a chunk that can lodge in a hose, elbow or in the heat exchanger. To remove it I simply use my needle nose Vise Grip pliers. Category, View Catch it in a towel, cup or have a turkey baster, rags and or a sponge on hand to dry everything up afterwards. any other proprietary brand should be fine. If the impeller is in pieces, be sure to get all the bits out and be sure they are all accounted for. Portside marine service lots of engine so that have a big tub of oil but the average DIY boater is more like to use the oil that comes in squeezable quart bottles but the technique is exactly the same. jig designed for holding it. Pumps, Livewell Aerator Pumps practice it almost invariably sticks and will need a few taps with a soft Cover the replacement impeller with petroleum jelly. Just the same, an impeller will eventually fail while in operation, and usually at an inconvenient time. and allows the body of the pump to sit fully down onto the base plate gasket. Even of you put an impeller in with the vanes completely backwards of the pumps rotation it would correct itself with the first bump of the starter. If your impeller came with more than one gasket chose the correct gasket by matching it to your cover plate or o-ring groove. If you have a Jabsco pump, the Jabsco impeller part number can be found on the Data Sheet that came with it. The engine that we serviced was a 1996 115 hp Mercury hung Telescopes, Covers and Lift the unit clear and place it on a suitable bench or Please understand that PB Blaster can eat pump seals, engine seals and engine gaskets for breakfast. A simple mishap like forgetting to open the engines raw water intake, or a partial weed plug in the intake, can kill an impeller in short order. Protection, Dock Storage & Unscrew the bolts that hold the pump housing in place. For raw water pump applications, first close the water intake thru hull valve. Ventilation, Interior & Cabin Accessories, Boat Lift Canopy Slide the housing down and ease it over the vanes as you twist Some petroleum greases are non-compatible with the impeller material and greases tend to get gummy in the internals. A product called The Right Stuff from Permatex is also similar. Deals, Trailering If you need to use a penetrating oil Id advise spraying it into the spray can cap and then dab it on the screws with a Q-Tip. Accessories, Boat Install the smaller gasket which seals the joint between the top Parts, Inflatable As always, in a situation like this, where it had limited flow, I make a habit of checking the impeller. Accessories, Pontoon Bimini Boat Gel Coat - Spectrum Color, Pumps and Clearly this was enough to heat the impeller and damage it. Some pumps, such as certain Oberdorfer models, have cover plates with no stamped part numbers on them. Storage Deals, Electronics Winches, Boat Motor Supports & If you can change oil or an air filter or clean a blender after making frozen chick drinks you can certainly change an impeller. Parts, Boat Tubing & Nigel Calders excellent book, Boat Owners Mechanical and Electrical Manual, covers detailed rebuilding. Deals, Electrical With the unit clear of the top half of the outboard leg we can will be working at floor level. Your pump may need additional service, particularly the seals, bearings, wear plates or clutch. Accessories, Marine DC Power Plugs We do not want to put this website behind a pay-wall. Bilge Pumps, Shop Please log in to leave a review of this tip. Marine Battery Chargers, Shop Honda 5hp Outboard, Boat Some pumps use set screws or c-clips. Tighten the cable-tie down until it draws in the impeller vanes into a contracted shape but not overly tight that it is difficult to remove. However, we ask you to help us increase accuracy.
Deals, Camping & RV A setting tool is included in the kit and this is pushed down on top of the seal and does double duty of spreading it out and ensuring that it is not compressed too much. Reinstall the lower unit onto the leg, it helps a great deal to have a helper rotate the engine by hand a little to get the splines to mesh. Both the rear of the pump and the cover plate should be lubed with glycerin before final assembly or insertion of the impeller. I have also note Globe impeller failures similar to this on customers boats too. Plumbing, Anchor Correctly installed impellers may last for several years, but you should stick to a schedule of preventative instead of emergency maintenance. Tie an electrical cable-tie around the impeller. Whilst pushing the impeller in, pull the cable tie off with pliers if need be, releasing the vanes inside the pump housing. Everything should be clean and bright. We use cookies to optimize site functionality and improve your overall experience.
Varnish, Marine Adhesives, on the left. & These sealants do not totally cure, remain flexible and will not contaminate sealing surfaces with silicone. Hardware, Marine I often hear of folks talking of using zip ties to pre-compress the impeller for insertion but I honestly dont understand why one would need to do so. Terminals, Marine Fuse Blocks & With the seal thus set the compression tool is then removed. If you spot an inaccuracy or an omission on this page please contact us and we will be delighted to rectify it. Thoroughly clean out the impeller housing with a clean cloth and apply a good coat of petroleum jelly (Vaseline). All, Boat Bimini
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