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Old 04-08-2009, 08:18   #16
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Hi Anjou,
Here's a link for a Volvo gear driven waterpump that is found on many sail boats. Though the gear drive and shaft connection are not clearly shown, they are a great example of an interference fit.

Volvo Penta exploded view / schematic / Sea Water Pump: MD2040A, MD2040B | COMMON
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Old 04-08-2009, 08:26   #17
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Thanks Tellie

the schematic doesnt make sense as the nyloc 4 and washer 5 are reversed, as is bolt 7 but hey ho, maybe they also have nerdy types in Sweden who draw this stuff and have never seen it for real.

I dont get to see many marine engines, just abused truck and plant donkeys
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Old 04-08-2009, 08:35   #18
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Schematics many times don't make sense (damn engineers<grin>) until you have the part in your hand. I agree the nyloc does appear to backward. Bolt #7 is actually facing in the proper orientation but again you'd have to be looking at the front of the engine to see how the water pump is bolted on.
OK I'm stumped, what's a plant donkey?
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Old 04-08-2009, 08:40   #19
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The "donk", (as they say in aus) does the work.
In nautical terms its the iron sail.

In an aeroplane, it drives the fan which keeps the pilot cool, cos he sweats a lot when it stops. lol
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Old 04-08-2009, 11:16   #20
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Tellie - Thanks for more education & info.........BTW, I swear it's not my boat......but as Capt'n Jack Sparrow said "I'm in the market"

anjou - this Yanmar is an older (late 80's) model - I too was surprised at first as I had only seen belt driven Yanmars.......yup, continuous learning this sailing thing is
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