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Old 16 July 2010, 20:08   #1
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Manual release valve -Merc "design1" PT

OK, the rebuild is progressing well on some fronts - my pistons are now inside the cylinder block , however I have a small problem with the manual override valve on the PT unit I got to retrofit. Namely, it's gubbed.

I got suspicuious when I saw the screw head where you would normally apply screwdriver, and then discovered the shaft had sheared. I was then quoted more than I paid for an entire PT midsection for a new replacement.

So, does anyone have a merc/ Mariner "Design 1" PT that they could remove & measure up their manual override valve? I am likely to completely destroy the one that's in there on removeal, and to put none too fine a point on it, RRP for a 1" long bit of plastic and a couple of O rings is taking the P, no matter what branding is on the box.
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Old 17 July 2010, 03:17   #2
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Design 1 is the external pump and 2 ram type isn't it?
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Old 19 July 2010, 05:03   #3
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Probably on some fronts. This is the single offset ram unit with the motor parallel to the ram sat atop the header tank. I believe the easy way to tell them aopart is the color of the fill plug (gyellow Vs Black) however there's a subtle difference to the pump base manifold too, in that the PRV seems to be assembled from the joint with the piston side, whereas the design 1 (as described o nthe microfiche) has a separate screw so it can be assembled without separating the pump manifiold form the bottom of the piston. If that made any sense.
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Old 21 July 2010, 17:37   #4
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One of these:

shown with broken manual release, and the puddle of PT fluid that Mrs 9D is currently unaware wandered across the dining room table..... oops!
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