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If you are sure of these then you probably either have a blockage in the adapter plate under the powerhead or a faulty poppet valve. We need to remove this plate also so if it stays stuck in place you may need to pry it up very carefully.
The pumps driven by the same drive shaft that drives the propeller and the pump itself is little more than an impeller in a housing with a couple of gaskets.
Replace water pump mercury outboard. How to service and replace your water pump impeller on a mercury outboard. 75hp 90hp 115hp 125hpLarger Optimax outboards run the same water pump as do M. How to replace water pump in 50 hp MERCURY OUTBOARD - YouTube.
It should be replaced with the new gaskets from the water pump repair kit or called Mercury outboard water pump replacement. Make sure to lube the gaskets with the engine oil prior to mounting. The new impeller needs to be slide down the driveshaft before you seat the water pump housing on top of it.
Putting a new water pump on your Mercury outboard means tinkering with the engines peripheral workings that well keep it working. The pumps driven by the same drive shaft that drives the propeller and the pump itself is little more than an impeller in a housing with a couple of gaskets. Mercury Outboard Water Pump Kit.
5206550 up–99 - 15. A197112. Install the new water tube seal included in the water pump repair kit onto the water pump housing and youre done.
Replacing the water pump on a Mercury 40HP 2-stroke outboard engine is similar to changing the water pump on a 4-stroke. Of course your motors impeller needs to be changed regularly but its also a good idea to replace other components of your water pump to maintain proper engine cooling. Water pump kit contents vary so please take a look at the categories below and check the content of the kit you order.
Items included may be an impeller wear plate impeller cups o-rings grommets mounting bolts pump housings and. Bear in mind that replacing the entire water pump is a significant repair for your Mercury outboard motor. How to Replace Your Mercury Outboard Water Impeller.
Most Mercury outboards follow a similar design so the following guide will apply to most models. The next steps will guide you through the basics for a 60 hp Mercury outboard water. Mercury 40HP Outboard Water Pump Replacement Replacing just the water pump impeller or the entire water pump itself on a Mercury outboard is essentially the same process.
Watch the video above and follow the steps below to replace the water pump on a Mercury 40 outboard engine. Separate the housing and slide it up the shaft. You can see in this picture that the bottom plate is coming off with it.
We need to remove this plate also so if it stays stuck in place you may need to pry it up very carefully. All in all the pump was in pretty good shape all. Mercury 110 98HP Water Pump Replacement Greetings from Australia saw your questions posted on web site had a few of my own.
The 75 and 98 Mercurys come in short and longshaft. My old 98 has a two piece drive shaft. By removing the 8 upper drive shaft the leg can be reassembled as a short shaft.
Slide the impeller housing up over the driveshaft and pull the impeller out of the housing to examine it. If the impeller blades do not spring back into position easily or show wear and cracks in the rubber you will need to replace it with the new impeller from your water pump kit. When you replace the water pump you need to be 100 positive the water tube guide the plastic cylinder guides the copper water tube into the water pump.
Double check the key is properly in the impeller. If you are sure of these then you probably either have a blockage in the adapter plate under the powerhead or a faulty poppet valve. May 16 2011.
175 mercury water pump replacement - installing lower unit. Get both the lower unit and the engine in neutral. Try to push up the lower unit until it wont go any further then push the gearshift into forward.
Itll usually slide on up when you kick it in gear. 1988 Mercury 90 horsepower water pump replacement. The other posters are recommending a method that has some issues.
The gearcase can easily get out of sync with control. My way is much better. Set the control to neutral.
Remove the wrap cowl and top cowl. Trim the motor all the way up and lock it up.