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Old 04-17-2015, 05:51 PM
davisnate davisnate is offline
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Join Date: Apr 2015
Boat: Mastercraft, Prostar 200, 1989, Yamaha Outboard
Location: South
Posts: 2
Water in gas from gas cap

I have one of the few outboard MasterCrafts (Prostar 200, 1989). It is a great old boat, but the gas cap is in a low spot on the bow of the boat (facing straight up). When it rains, a little water puddles up in that low spot and ends up in the gas. There is an o'ring in the cap that looks to be in good shape. Anyone had this problem? How did you solve it? Is there a way to move or raise the cap?
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Old 04-17-2015, 10:13 PM
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orbeamlb orbeamlb is offline
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Join Date: Feb 2012
Boat: 1988 ProStar 200, 1991 Mercury 2.5L 200hp XRi Outboard
Location: Austin, Texas
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Welcome to Team Talk. Sounds like your gas cap isn't sealing well allowing the water to seep in. They're easy to replace. Changed out mine a couple years ago but for cosmetic reasons.

Post up some photos of your PS200, we love photos here.
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Old 04-17-2015, 11:09 PM
davisnate davisnate is offline
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Boat: Mastercraft, Prostar 200, 1989, Yamaha Outboard
Location: South
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Thanks for the reply. It seems that if there is any corrosion on either the cap or the receiver, water could slowly seep in. So I would replace both parts? If so, then I wonder if I could use one that stands up about an inch off the surface.
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Old Yesterday, 05:38 AM
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whiskeyriver whiskeyriver is offline
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Boat: 99 prostar 205 LTR
Location: Southeast
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Probably not the most asthecially appealing, but how about a spacer between the filler neck and the deck. You may have to fabricate your own as I don't know of any. Or as you stated possibly a filler neck of a different design, one that protrudes further above the deck surface?
Just my .02
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Old Yesterday, 01:23 PM
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orbeamlb orbeamlb is offline
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Quote:
Originally Posted by davisnate View Post
Thanks for the reply. It seems that if there is any corrosion on either the cap or the receiver, water could slowly seep in. So I would replace both parts? If so, then I wonder if I could use one that stands up about an inch off the surface.
Here's the one I installed on '88 PS200. It's polished Stainless Steel made by Sandvik. The pop up turn key works well.
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