08
Jan
MERCURY Outboard Marine Engine Fault Codes list Vessel Text Action Text. On many outboards you can simply put on the muffs and start the engine.
Always check the units closest to the pump first and work yourself downstream.
Mercury outboard water pump not working. There are three reasons your outboard motors impeller wont pump. The first is that the water stream fitting – the outlet hole for an outboard motors cooling system – is clogged. Insects love to crawl up into it but once there they may become trapped and die.
Once the cooling system is full of water. A little out of sailing but any ideas as to what is causing my Mercury 35 Outboard to not pump water. Ive replaced the housing top it was cracked gaskets impeller grommets all the vital parts are new.
The impeller turns with the shaft the pin in centered in the impeller. The lines are clear blew them out with air. Ihave a 650 mercury outboard water pump is not pumping waterWorked.
The motor will not start and there is fuil leaking out the. The motor will not start and there is. The most obvious way to tell if the outboard water pump is failing is to watch for the engine to overheat.
However this problem can be caused by a number of issues which is why its vital to test for a bad outboard water pump. How Do You Test an Outboard Water Pump. On many outboards you can simply put on the muffs and start the engine.
20 hp mercury thunderbolt water pump not working the older ones do not have thermostats ok forst of all your tell tale hole may just be plugged so remove the hood and find where the water exit hose leaves the motor and take that right off the water outlet from the engine to the exterior fitting of the engine so you have the hose in your hand check it to make sure its not clogged. Water is not pumping out of the water pump hole on my Mercury 50 2 stroke. I took the lower housing off thinking it may be clogged with sand since I ran through some yesterday and checked the rubber fan but it was all clean.
When I put it back together it still was not pumping water. If you are running on water hose flusher may not see any water pressure try running in water to see if get pressure. May need to check thermostats are not stuck open and the pressure control valve is not stuck open.
Another way to tell is if you can touch the water jackets sides of the cylinder block and keep your handfinger there without it getting so hot you remove your hand. That means water is circulating and cooling. If you have any doubt however it is always good maintenance to rebuild the pump and replace the impeller every other year.
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. If it isnt plugged then the water pump is most likely shot and you shouldnt run it at all if this is the case you will want to have it fixed before you sell.
When you had it in the water did you speed up from an idle at all sometimes when a pump is weak it wont pump at an idle but will if the motor is running a little faster if this is the case good news. You still have to replace the pump. Is your Mercury outboard water pump not functioning like it used to.
A water pump is a vital component of your outboard that can cause several serious performance issues when it fails. Because a bad outboard water pump will produce lower water pressure than normal operation you may experience overheating restrictions to available RPMs and eventually significant damage to the. Replacing the impeller on a 4hp Mercury outboard to fix the water pump Part 1 - YouTube.
If the engine cools and water comes from the tell tale then the pump is the issue. Remove the pump cover check that the key XXXXX for the impeller is in place. Check that all the gaskets XXXXX 22 are in place.
Then lastly check the pump base XXXXX below the pump plate. If this housing is melted the pump will not pump water. The rubber material can also get stiff and brittle a common problem on motors that sit unused for several seasons.
Then the vanes can take a set in one position and not flex back. The other impeller-killer is heat. Water lubricates the pump and if its run dry.
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.
I just bought a 1987 Crestliner with a 1987 Mercury Black Max 175 HP Outboard. I have not had the opportunity to put it in the water yet so I hooked up the flushout attachment just to check it out. Can someone tell me how much water should come out of the discharge small hole at rear base of power head when idleing.
MERCURY Outboard Marine Engine Fault Codes list Vessel Text Action Text. Critical Oil Pump Oil pump is not working properly. Return to port Immediately Service engine.
Water pressure sensor is not working properly. NonCritical Service Engine Soon. If raw-water pump is belt driven make sure that belt has correct tension.
Restrictions on the outlet side of the raw-water pump These restrictions are often in the form of raw-water debris accumulating on the inlet side of oil coolers and heat exchangers. Always check the units closest to the pump first and work yourself downstream. How To Change an Outboard Engine Water Pump Impeller.
If playback doesnt begin shortly try restarting your device. HOW TO Replace Impeller Water Pump Mercury Outboard 75 hp. If playback doesnt begin shortly try restarting your device.
A cracked clogged or otherwise worn fuel pump is often the reason a Mercury outboard cranks but wont start. Consult a repair manual for your engine model and year to determine the proper replacement part. And thus Mercury Outboards were born by Kiekhaefer and his 25 employees working 18 hours per day 7 days a week.
Mercury Marine Technical Library Our Mercury Marine Parts technical expertise also allows PPT to provide our boating customers with direction regarding Direct.