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  1. C

    1978 Merc 800 bogs

    "Compression is 145 psi in all "Compression is 145 psi in all four holes. Had a tune up on it and all cylinders are fireing. It idles fine. When i throttle up, whether fast of slow, at about 2500 rpm it will die out and stall. If i can get past that rpm range it will get up and dance across...
  2. C

    Randy

    "I have a 1978 Merc 800. Comp "I have a 1978 Merc 800. Compression is 145-150 in all four cylinders. Number one cylinder has no fire. How do I check the spark plug wire or should i focus on the coil intead? Any other ideas as to diagnose this problem, i sure would be grateful randy"
  3. C

    1978 800

    "Greetings: Im new here and "Greetings: Im new here and would like to know the forums veiws on a 1978 80 Hp Mercury long shaft. The compression in all four is 125 PSI. This motor seems clean and doesnt apear to have been abused. No distributor on this one for once. I also have a...
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