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RoosterR

Water Pump ???

10 posts in this topic

I have a 1984 Mercury 35 HP that takes aboud 30 seconds from start to shooting water out tell tale. Even stopping and starting 5 seconds later it still thats that long.I don't remember how it was last year. Is this common or do I have a problem. Should it shoot water right away. Thanks for the help.

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I think my old 25 Merc was the same, it would always squirt water out the "pee hole" but if I remember it would take a little while.

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I not sure, but i dont think that one is thermostatically controlled and 30 seconds sound like a long time to me. After checking for obstructions, I'd pull the gear case and put in a new impeller.

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That motor does have a thermostat in it.

What's important is what is the stream like, at idle, once it starts stream starts running? If there's not much pressure it's time for a replacement.

marine_man

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When idling the stream is very poor, almost spiting out. Is relacing the impeller complicated, can you do it yourself, or do you have to bring it in. Thanks for the help.

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Replacing the impeller is pretty straight forward.. do a search in this forum and you'll find several topics on it.

marine_man

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Another question, do you replace the impeller only, or do you use the impeller kit? The parts man told me just need the impeller. I haven't opened it up yet to see what it looks like. Can you replace impeller only without using new gaskets?

Thanks again for the help.

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Yes you can, but for the extra $15 or so, I personally would do the kit. I just did my 150, and the gaskets were basically shot. You have to take it all off anyway, so why not put new stuff back on?...

Good luck.

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I replaced my gaskets as I tore one when I removed the lower unit. Can hurt to replace it all and then you know all is well.

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Just got the lower unit off, and opened pump. Two of the six fins on the impeller were completly gone. You guys are right thats why it was pumping poorly. Going to get new kit shortly. Thanks again for helping me out.

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