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  1. BR

    '76 Merc 850 Wrist Pin Needle Bearings Question

    I am replacing the #4 piston on my motor. I'd like to know if anyone knows the correct number of needle bearings that are installed between the piston wrist pin & connecting rod. I counted 28 bearings when I disassembled (a year ago) but it seams like I could fit one more needle bearing in...
  2. BR

    '76 Merc 850 - Damaged piston skirt, and other fun...

    I?ve been working on ?76 Merc 850. Motor would start & run but not idle. I had good spark to all four cylinders. Compression is even on all four 120 psi +/- 2psi. I removed carbs & cleaned, replaced fuel lines, etc. Still wouldn?t idle or even run below 1,000 rpms. I tried the old trick of...
  3. BR

    '76 Merc 850 Timing Adjustment Screws?

    I?ve just got this motor running after a long and undetermined amount of time sitting (> 5 years). I would like to verify the settings / adjustments for spark advance, idle speed, etc. I have read Clams? post on the procedure for the Merc inlines and have followed it with success for my older...
  4. BR

    '76 Merc 850 Leak at Fuel Pump

    I just rebuilt my fuel pump replacing the gaskets and diaphram. Also have recently replaced the fuel lines and done a carb clean and rebuild. My problem is when I put everything back together and pumped the fuel line bulb to prime the carbs, I noticed fuel leaking from around the plastic...
  5. BR

    Wiring harness interchangeable? '73 Merc 500 to '76 Merc 850

    I?ve got a 1973 Merc 500 with original control box and engine wiring harness. I would like to use this same control box and harness to get a 1976 Merc 850 started and running. My question is can I use the same control and wiring harness to run both motors by plugging into one or the other? I...
  6. BR

    '76 850 - Installing shift shaft into lower unit

    I've got a '76 Merc 850. I had trouble separating the lower unit from the midsection. The problem was the shift shaft linakge was corroded and siezed at the coupling to the midsection shift shaft. I did get it apart but the lower unit shift shaft came out of the lower unit through the...
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