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    74 MERC 850 Gears

    I have an 850 that was slipping in reverse last summer. I pulled it apart and now I need to figure out what will be my best way to repair it. -New gears are crazy expensive. They will cost almost as much as I paid for the boat. -I thought about getting the faces of the gear machined down...
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    76 Merc 850 Tell Tale

    Had the lower unit off to fix a seal and replaced the impellar while it was apart. Now that it is back together, I noticed the tell tale only dribbles at idle (1000RPM) It has to be above 2000RPM before you get any kind of stream. Even then, it is not a real strong stream. Should it be a...
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    74 Merc 850 Questions

    I have a new to me 850 that I have been trying to get working properly and have a few questions. First of all, the biggest issue is the gear engagement. I can set the linkage so it engages well in reverse or forward, but not both at the same time. When I set it to try and have both reverse...
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    Merc 850 Oil Leak

    I have a 1973 Mercury 850 that has a leak. I haven't had it in the water yet. The oil is coming from a vent hole half way up the leg. Where would be coming from? Is there a vent or overflow (wishful thinking) or is there a seal that is toast? :confused: Pic...
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    1973 85HP Trim / Tilt

    I just finished moving the Merc engine to my boat. I have the trim motor mounted under the splashwell. I am going to connect the hydraulic lines but I am wondering if it matters which hoses go where. I can't see why there would be a difference as both cylinders are going in the same direction...
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    Motor Swap

    I have a 75 fiberglass tri-hull that has had an 85HP Evinrude on it since it was new. I have taken it off and am going to put a 73, 85HP Merc on. Is there anything I need to worry about before I go and re-drill the transom? I assume that as long as I center the new holes in respect to the...
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    Decisions, Decisions

    I have to decide what I want to do for the outboard on my boat. I'm new to boating so am looking for input. I have two motors I can go with for my 1975 16' fiberglass tri-hull. The motor currently on it is a 1975 Evinrude 85HP that has been on this boat since day one. It has power tilt, but...
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    1975 Evinrude 85HP Outboard

    I have an 85 Evinrude that doesn't want to start cold. I can crank it forever with the cold start lever up and the electric choke on without even so much as a pop. The primer bulb has been squeezed to fill the float bowls. I then cracked the bowl drains and let a bit of fuel out. I could...
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    73 Lane Project or Trash?

    Looking for some advice from those who have experience with repairs like this. I bought the boat in the winter with the hopes that it didn't need too much work. I kind of liked this looks of this thing and it didn't seem too beat up. Once I dug into it however, I found the floor to be soft...
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