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  1. J

    50HP Merc 4 Stroke. Spark Plug leaking gas when changed.

    1995 50HP 4 Stroke EFI Merc. Serial 0G270011 Replaced the spark plugs on motor. It makes a sputtering sound when it hits 3k - 5k RPMs and RPMs start jumping around. Still trying to figure out what is causing that. So I replaced the plugs. The bottom plug had gas running out of it when I...
  2. J

    Spark Plug Gap 50HP Merc

    Serial # 0G270011 1995 or 1996? 50hp fourstroke EFI Trying to verify what model of NGK spark plugs to use. NGK has this.... Year Engine Model Standard Plug V-Power Plug G-Power Plug Iridium Plug Platinum Plug 2001-1995...
  3. J

    comp and spark testers

    Could someone give a recommendation for a compression and spark testers for 1996 50hp 4 stroke merc?
  4. J

    Fuel Pump issue 1996 50HP Merc

    Merc 50hp 1996 4 Stroke Used boat, haven't put it in the water yet. Don't know the history of the motor. After getting it running it just seemed like it wasn't pumping enough gas. So I pulled the fuel pump off. Big chunk missing circled in red in the photo. Question 1: Other then age of the...
  5. J

    Advice 115 and 50 Merc Gas/oil mix? Year?

    I have two Mercs. 115 and a 50 4 Stroke. Want to make sure I'm supposed to mix gas/oil with one and not the other? Also want to make sure my years are right. 1995? 4 Stroke 50hp Serial 0G270011... Straight Gas? 1985? 115hp Serial 0A180166... 50:1 Mix?
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