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  1. M

    1977 850 piston ring confusion

    Hey guys, I'm in need of standard rings for my 850 overhaul. The problem lies in the fact I have 2 ring Pistons yet all I see listings for is 3 ring sets? Then I get in the keystone versus rectangle cut and I get more confused. What I appear to have is two rectangle cut rings on each piston...
  2. M

    New '77 850 owner prop help needed

    Hey guys, I just bought a used 77 merc 850. Not much history before the purchase but for 300 bucks I wasn't about to start complaining. Just checked compression and was happily supprised to see 140 130 140 140. After fogging and waiting 20 mins I tried to fire it up. Started great. Needs a...
  3. M

    '68 55hp 3cyl new water pump, low pressure?

    Hey guys I'm hoping someone has some experience with this old girl. First off this motor runs awesome. I replaced the WP and added a gauge, there was a pipe plug right next to my thermostat so I added the gauge fitting there. I replaced the complete pump kit. I notice there is no pressure...
  4. M

    68 55hp l/u to ext. housing gasket?

    I'm currently working on a 1968 Rude 55hp 3cyl. It has a gasket that goes around the perimeter of the lower unit, between the lower and intermediate housings. A '69 and later motor doesn't have this gasket? I'm not sure it this gasket is required or not. Its discontinued and no one seems...
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