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ourboard advice
6 November 2004, 6:02 PM
BiscayneBabyBoat
Joined 31 Dec 2003
2 posts

I have recently been given a 1983 Mercury 3.5. I have had it running but decided to service it prior to laying it up. I managed the new plug and cleaning the carb. When it came to renewing the impeller I encountered a problem: the rubber part of the old one cam away in the pliers but the brass centre stays fixed stubbornly to the shaft. I have tried WD40, hot water, gentle tapping. Any ideas? The opening is very restricted and you can't really get a good grip with pliars.
steve
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ourboard advice
7 November 2004, 7:45 AM
Ian
Joined 28 Apr 1998
136 posts

Hi,

Depending on the size and shape you might be able to get it out by using two smallish screwcrivers.

Get the blade of the screwdriver under the bottom lip of the brass bush and lever against the side of the cavity. Use two from opposing sides.

The other alternative (and probably less likely to do damage) is to bend the tip of the blade of an old screwdriver to about 45 degrees. Then slip the blade under the bush and rock from side to side, levering it up. You might need to file the end of the screw driver to make it thin enough to get under the bush. You'll need a cheap screwdriver as it won't be too hard (and thus brittle) to bend.

Be careful as you do anything like this that you don't damage the walls of the pump and particularly the gasket face.

Ian

Discussion Archived

ourboard advice
7 November 2004, 3:47 PM
Steve
Joined 22 Oct 2004
3 posts

HI
Ive had a similar problem before and was able to rectify it by using a good pair of caliper pliars and a small amount of heat.
Discussion Archived

ourboard advice
7 November 2004, 6:06 PM
BiscayneBabyBoat
Joined 31 Dec 2003
2 posts

Thanks Steve
I was worried about the heat ruining whatever was below. In the end I drilled down the brass and it all came away.
Steve
Discussion Archived

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