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Yamaha 4hp outboard does not pump much water, we replaced the entire pump assembly. I removed the lower unit and rigged a water line to the water intake tube but very little water comes out even with the additional water pressure. Could it be the thermostat (if it has one) Removed the powerhead from the base but it is difficult to tell where there might be blockage.

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Hi,

If no water enters the washing machine, but the drum starts turning (as though washing normally) then you should stop the washing machine as there may be a fault in the pressure system that controls the levels of water. This fault can cause the timer to receive a false signal that water is already in the washing machine and the heater may be energized. This can damage the heater or burn the clothes inside. A blocked pressure chamber can trap air in the pressure tubing and leave the pressure switch on. If this happens, when you put the washing machine onto a wash program it doesn't take any water in and starts washing because it thinks there is water inside. This fault should also prevent the washing machine going into spin though too.
If the washing machine is not taking in water from one side only, (i.e.just the hot or just the cold) then the obvious thing is to check that water is actually available through the plumbing from the offending pipe. Turn off the tap on the affected supply and unscrew the hose from the valve at the back of the washing machine machine. Then simply hold the fill hose into the sink or into a bucket and turn the tap back on. If water comes through at a decent flow rate then check the filter in the water valve on the washing machine. You can pull it out with a pair of pliers and clean it. However, this will only explain your fault if it is severely blocked up, which is rare.
If no water comes through the hose, or the flow is very slow, then the fault is in the plumbing. This is actually also quite rare, but if your machine was plumbed in using those self plumbing taps that clamp on to the copper water pipes then they do sometimes get clogged up and need the hole clearing. If this happens to the cold supply it can be achieved by turning the stop tap off first, but if the hot supply is blocked - which is the most likely of the two - then you have to turn off the cold supply and then drain the hot water tank by turning on the hot tap until the water is drained out (unless you know where the valve is to turn the hot water off in your water cylinder).


Goodluck,
Please don't forget to rate the solution.

Posted on Apr 03, 2008

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The thermostat must be warm to let the water flow out

Posted on Apr 03, 2008

  • Kleanthis Mavropoulos
    Kleanthis Mavropoulos Apr 03, 2008

    Who asked for a washing machine?

  • Kleanthis Mavropoulos
    Kleanthis Mavropoulos Apr 03, 2008

    Around cylinder liner there are passes of circulating cooling water.

    If there are salt deposits clogging , they must be removed using salt-deposit disolver there and in all water circuit, so the water can circulate freely.

    Water pump usually has two rubber impellers. They must better be replaced to ensure efficient pumping.

    Inspect also the condition of suction area to be well cleaned.

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