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    What Is The Small Black 7/64" Vacuum Line For?

    Can someone identify what the small Black rubber 7/64" vacuum line is connected for coming down about 1 foot on the starboard Right side of the Mercury 800 80 hp 1978? It was cracked at the top where it was pushed onto the small fitting located behind the switchbox area so I cut the end and...
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    Step 1 to Successful Boat Launch

    Hello Dear, Don't forget to put that plug thingy back in the boat before you go. Love you, have a nice day 😊
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    UBER BOAT

    Ok, So if you're old Outboard dies & leaves you stranded waiting for a Good Samaritan to tow you back to the dock and you're in Croatia, or near London, just anchor and Call UBER BOAT. You can also call UBER anywhere in the US and they'll get a good laugh. 😅
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    Final Solution To Old Mercury 'Thunderbolt' Fix

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    Mercury Fuel Supply Problem OEM Hidden For Decades

    If you think fuel problems are simple and can't be a pain to solve, seem to be electrical and so on, check this: do it and find out.. surprise surprise (Redesigned) Decades (Later). Duuh! Mercury again! Yes it will require a few items removed to get it out but that's why you're fighting that old...
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    OEM Mercury Outboard Fuel Supply Problem Fix

    If you think fuel problems are simple and can't be a pain to solve, seem to be electrical and so on, check this: do it and find out.. surprise surprise (Redesigned) Decades (Later). Duuh! Mercury again! Yes it will require a few items removed to get it out but that's why you're fighting that old...
  7. M

    CSM Cold Start Merc DIY Direct Injection Y'all

    Got Thunderbolt? When the 43 year old stubborn spoiled old girl doesn't like wakin' up to go fishin' early in the mornin' or after her long nap stickn' y'all at the doc crankin' n chokn' er to go, this gets er up n no more embarrassment, now she's complete with 2 small holes, one in front of...
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    Mercury M-800 Thunderbolt Full Throttle Only Now Help

    I bought a1978 Glastron with Mercury 80hp model 800 Thunderbolt 2 stroke 4cyl Ser#500I9751 but soon had running & starting problems. I've replaced/redone all necessary CDI stator trigger rectifier coils starter & solenoid correct plugs wires switch box carb & fuel pump kits fuel lines prime bulb...
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    Mercury 1978 80hp Thunderbolt Outboard Stator Bolting & Wire Exit Position?

    I purchased a used 1978 Glastron but after two sucessful times on the lake, the third & 4th time left me stranded. Since then, I've replaced or redone All necessary CDI & Carb, Everything & compression check 130#ea on the Mercury OB 80hp model 800 Thunderbolt Ser# 5009751 However, After bolting...
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