1975 Mercury 850 85HP Outboard

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Uploaded by on May 17, 2011

Demo of outboard motor for sale, a 1975 Mercury 850 Thunderbolt. Demo done on Lake Macatawa, Holland, Michigan

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Autos & Vehicles

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Uploader Comments (franklinsnarl)

  • It looks kind of small on that boat but it sounds good and started on first turn of the key. I'm surprised it went that fast though it looks like a pretty heavy boat.

  • @ballistaking29

    It is an aluminum hull, definitely helps with the weight. Still pushes a lot of water. The 115 hp ('85 tower of power) only gets me to 37 mph at WOT. Needs a different prop, could probably do a do a bit better. It does not start as nice, though : (

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  • @tajma11  thanks

  • @ rory2895 the oil to gas ratio mix is 50-1

  • The gas to oil ratio is 50-1

  • Just pickedup a 1976 Mercuty 4cyl 850. Does anyone have the electrical diagram for this motor, any a few pics to connect all the wiring? Got a jigsaw puzzle from previous owner. Tyring to sort it all out

  • whats the gas mix ratio 

  • Nice sounding motor for it's age!!!

  • Im pretty sure I had that engine on my '69 caravelle. I do love the sound of these old Mercs.

  • I just bought the exact same motor, same year too !!!! putting it on my 1976 BAJA Speed Boat !!!!! The guy i got it from had it on a 14 foot ski boat, it was doing 52 mph !!

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