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| After about 5 min of run time the alarm comes on ,there is water coming out of the pilot hole but no water in the upper water hose I have taken the thermostat out but still no water in upper hose . I can blow thru the upper hose both ways so no blockage anybody got any ideas please ? |
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Posts: 1663
Location: Kodiak, AK | Is this in water or on ears in your driveway? |
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| there is water coming out of the pilot hole on the lake but I don't know about the upper hose on the lake . with the muffs on no water in upper hose but there is water coming out of pilot hole both places the alarm will sound after about 5 mins of run time . |
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Posts: 3480
Location: Elk River, Minnesota | Hiya,
Sounds to me like an impeller replacement is in order. If the impeller is bad, it may not be making a good seal in the housing, thus not enough pressure to get water up to the engine and circulating. With a replacement, you can check for blockage from the lower unit on up.
also, did you replace the thermostat? It could be that it is bad as well...
Steve |
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Posts: 1663
Location: Kodiak, AK | Agreed. I'd say impeller first, though some guys do have issues with otherwise fine motors overheating or not "peeing" in the driveway. Since it's doing it in the water as well, then something is askew. Impeller and thermostat are both fairly easy fixes. Do you know when your impeller was last changed? Needs to be at least every couple of years, if not every year on some motors depending on how much you run it. |
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Posts: 443
Location: Duluth, MN | Yea suggested replacement of impeller is every 3 years. Even if your getting water out of pilot hole. You might have cracked fins and it's not pumping as efficiently as it should. |
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Posts: 3480
Location: Elk River, Minnesota | Hiya,
the more I think of it, the more I wonder if the thermostat is the part that is not working. What the thermostat does is allow cooling water to reach the outside of the piston housing to cool it. But...it will not allow water there until the motor is warm enough to give good combustion. Once that point(temperature) is reached, the thermostat will open and allow water to keep the cylinder walls cool.
If the motor is "peeing" I think you might want to really consider a new thermostat.... The impeller should be replaced as well just for general maintenance purposes, but it also helps the motor keep itself running efficiently.
Steve |
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| can I fix this my self I have downloaded the shop manual but it looks like a lot of parts to take off to get to the impeller, do I have to worry about any seals for the lowwer unit ,and when I unbolt the lowwer unit does it just come off or do I have to take apart linckage for the shift rod ? |
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Posts: 3480
Location: Elk River, Minnesota | all you would need for rebuild parts would be the impeller and key, along with the gaskets for the housing. For a little more, you should be able to get the whole housing as well... Shouldn't be too much $$ for that. As for taking off the lower unit, I don't believe you would have to worry about any seals. If the design is anything like the 2 stroke model (I am not sure on this...just going off of what I know about my yamaha), the shifting shaft is a slotted end similar to your prop shaft. So..when you unbolt the lower unit, it should just drop out of there. The only thing you might have to unhook from a joint is a speedometer tube.
Once the lower unit is off, it is a matter of a few bolts, cleaning up the old gasket material, and reassembly.
One thing to look out for, though is when you get the lower unit out, there might be some small shafts (they look like shelf holding pegs) that will help to align the lower unit to the mid section Sometimes they are loose and fall out, sometimes they are solid on one part or the other. Nothing to major of an issue, just something to pay attention to when you disassemble.
If you attempt to do this by yourself, you might want another set of hands as you remove the lower unit and reinstall...those things can get a little heavy, and definitely ackward to handle. So long as everything lines back up, water tubes, shafts etc...that should be about it.
Steve |
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Posts: 1663
Location: Kodiak, AK | Agreed. L/U's can appear intimidating, but they're not a huge deal |
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Posts: 4080
Location: Elko - Lake Vermilion | Question, If the Housing is scared or Pitted will a new Impeller still work, or should the housing be replaced also ? I'd say both would need replaced, right ?
Jerome |
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| Just got done replacing the impeller and it was a no brainer . It took about 40 mins and $37 the motor run cool now THANKS for all the help!!! |
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Posts: 3480
Location: Elk River, Minnesota | If the housing is pitted, I'd say play safe and replace it as well.. Any pit will hold water which will not allow the impeller to seal perfectly as the fin passes by thus lowering water pressure. For the few extra dollars, it would be a cheap investment.
Steve |
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