20
Apr
Start the engine and run for 15 minutes in neutral. As I do with with my boats every year i check the engine after winter storage.
It doesnt seem to matter what gear the motor is in at this point but its probably easiest if its still in reverse.
Yamaha outboard water pump not working. Same exact year and model motor as mineassuming your water pump is in good working order then its very easy to removeinspectcleanreplace the thermostat andor the pressure control valveblack plastic X shaped item under that square cover. You can take a perfectly good motor clamp off the tell tale outlet flow and the motor will operate just fine. The tell tale is an indicator that the pump is working.
Nothing coming out of the tell tale does not mean that the pump is not working however. A bad outboard water pump will produce lower water pressure than normal. The outboard can stop pumping water out the tell-tale begin to overheat restrict the available RPM allowed and cause significant damage if not corrected.
Thankfully you can service the water pump to. 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 with no outlet the impeller just agitates. 5 Years on a water pump is about max regardless of the hours.
Even If it looks fine when you pull it out I would not trust it. However the most likely cause is dirt dobbers or other critters that have crawled up there and nested. First I hook-up dual sided earmuff turn the water on pump the primer bulb till stiff and start the motor.
It started just fine and within maybe 15-20 second i can see the water coming out the pee hole but it was very weak. Thinking back to the mercury i. Your water pump may not be pushing enough water to make pressure to force it out.
There are enough places for the water to exit for the little pressure you might haveieexhuast ports. Or you might have blockage in the blockbut that is rarer. How to change a waterpump on a Yamaha outboard motor - YouTube.
If it is not getting to hot then the engine is pumping water. And all it is is that fitting that shoots water out the back is clogged. It has some sand salt or pebbles in it.
And all you do is pull the hose off it from the inside and then blow the fitting out from the outside in to clear it of any clogs. For these reasons its best to replace your water pump impeller or the entire water pump assembly when servicing these items and never rotate your outboards crankshaft or driveshaft in a counterclockwise direction. The rubber impeller is located inside a stainless steel cup and uses the water for.
Why is my Yamaha outboard overheating. A faulty water pump is a major cause of overheating-related outboard engine failures. Trimming the outboard up too much while underway or in turns can cause the water pickups to ingest air this causes a sudden loss of water pressure - not a good thing.
Click to see full answer. Insert the water tube that is in the upper casing into the water seal on the pump housing. Insert the shift rod into the upper casing.
It doesnt seem to matter what gear the motor is in at this point but its probably easiest if its still in reverse. When sliding the lower unit back onto the upper casing do not force anything. 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.
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Yamaha Outboard Water Pump. How to How to Replace a Water Pump. This video is on how to replace the water pump on a 2005 Yamaha 25 hp 4-stroke outboard motor.
Yamaha 40-70 HP Outboard Engine Water Pump Impeller 18-3069 Yamaha 9915 HP Outboard Water Pump Impeller 18-3074 Impeller Plate -Yamaha Outboard 63D-44323-00-00. Let the barrel of water get warm in which case it might do a better job of removing scale and deposits. Might even want to remove the thermostat just for the cleaning process to help the stuff recirculate just a bit better.
Presumption being that you have tested the thermosensor and that it is working properly. It has a Yamaha 99 outboard. Im not sure exactly of the model year but between 1997-1999.
As I do with with my boats every year i check the engine after winter storage. This year i have no cooling water coming out of the pee hole. I checked for clog in the exiting tubing and found it clear.
If your engine is not properly warmed up and you give it max power you could have a piston seize up and then you are faced with a major repair bill. Another side effect of removing the thermostat. And its not just Yamaha outboards.
All outboards face these same. Blast and let the hoses water pressure do the work. Let the water run for 15 minutes.
Level reaches the height of the outboards water pump about 1 above the lower unit separation seam. Start the engine and run for 15 minutes in neutral. Jan 14 2008.
Low water pressure at idle2003 Yamaha 150 hp vmax. When you clean the pressure relief valve you really need to remove and discard to old grommetuse a pick and carefully clean the pocket of corrosion and replace the grommet with a new one. As the tell tale streamis picked off at the point of water entry into the motor.