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    1964 850 Tower

    Looking to replace the wiring harness plug from engine to controls 1 socket broken? Anyone know the part number or should I by a universal harness?
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    1964 850 tower

    Just wondering if anyone still has one running strong
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    Identifying year and hp for a Lower unit 2.3 ratio

    Hi y'all looking for some info to identifying the year and hp of a 2.3 gear ratio L/U that I have mounted to a 64' 850 straight 6 as I'm looking to fit the right size from prop Propulse? As the guy who sold the L/U to me doesn't remember what year/hp motor it came off of🤔🙄😕 Any help is...
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    2.1 up to a 2.3 gear ratio prop pitch up or down?

    Mfg boat no idea on weight 1964 Merc 85hp Tower Had to swap for a newer LU with 2.3 ratio as it was really hard to source a same vintage LU 2.1ratio. 17" pitch prop from the old and newer 1. Can't reach wot get to about 3700rpms any higher sounds as if it's not grabbing the water. Looking for...
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    1964 850 I/L6 tach/kill switch wiring help

    Hello all looking to wire a aftermarket tachometer & universal kill switch but not sure on which wires to tap in to, old wiring on the harness so on the ignition switch I've got the following B,S,I,C,M,M. I know it's not magneto so I've just got B,S,I and C wired do I tap/splice into the...
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    Is this wiring correct????

    Hi Merc guru's need some help identifying if the black wire is indeed attached to the (I) (ignition)terminal of the switch with a jumper to the choke button?? As I'm wiring a newer switch old one is toast! And I'm not getting spark now! I've left the black wire unattached to any of the new...
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    64' Merc 850 Tower ignition

    Sorry I double posted the same question
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    64' Merc 850 Tower ignition

    Ok I've decided to change out the old 50yr old switch which was giving me problems off n on last season and stopped working this year!! What I'm using as a replacement is a Sierra MP39090 which has 6pole connections (B)attery (I)gnition (S)tarter (C)hoke (M)agneto (M)agneto Here's what I've...
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    Weight of a 64 Merc 850 I/L6

    Does any know the weight of a 64' Merc 850 I/L6 ? Lower unit was removed! Need to remove mine off the boat wondering if I can manage myself or need A shop crane or a dail a buddy ;-P Thanks in advance Chin
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    1973 Merc 1150 I/L 6 weight

    Hi can any owners out there that have had or know of this motor - 1973 Merc Tower Of Power 1150 Do you know roughly how much this motor weighs? Lbs or Kgs besides a smarta** answer "HEAVY" ha beat u to it lol Ok seriously need to know as I'm looking to pick one up...
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    45194 ptt cylinder rings n seals

    Hey all got a TNT cylinder 45194 1" ram leaks around the ram wondering any other option on replacing the o-ring and seals besides using the 48664a1 kit. Think I can go With automotive o-ring or are they flat sided o-ring oppose to rounded any input from anyone that has rebuilt it buying the...
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    1964 merc 850 6cyl lower unit compatibility

    Hi wondering if anyone can tell me what years and HP lower units will bolt on to my motor S/N 1664924
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    64' Merc 85hp 850 I/L 6 lower unit swap options help

    Hi everyone I'm looking to replace my lower unit as my existing one busted apart forgot to winterize guess I had quite a bit of water in the gear case froze and u know the rest :( I'm looking to find a replacement LU but don't know what I can use except to look for a 64 85hp LU. What kinda...
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    Mercurymarineoutboardparts.com feed back please

    Looking for some feed back on outboard parts available online anybody ever use this site?? "Mercurymarineoutboardparts.com" Or any tried and trusted sites besides iboats.com of course ?? Thanks to all that reply !! Happy boating be safe out there! Dave
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    1964 merc 85hp 850 I/L 6 interchangeable 85hp 3cylinder parts

    Hi does anyone know if the 85hp 850 3cylinder motor parts can be used the the 64 850 I/L6 like the lower unit or maybe the carbs, starter, prop and controls etc any advice would be great
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    Need PROP HELP !!!!! 1964 Merc 850 85hp I/L 6.

    Hey everyone need help to find a new prop and what other part to install it ? Last trip to the lake, lost my lost prop and all other part that attached:facepalm: Could anyone tell me what size prop I would need with a pitch suggestion? I think the prop that was lost was original. Please I...
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    1964 850 I/L6 tachometer how to wire

    Hello again I'm now looking to wire a tachometer to the motor to tune my motor but not sure of where to hook the sending signal wire to any advice. Use the coils, rectifier or plug wires do i hard wire, splice or just wrap around the ignition wire which cylinder any advice. Thanks in...
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    1964 850 I/L6 lower unit

    Hi was wondering if this is normal on the lower unit water dripping out of a little hole. If I blow air in to the little hole I hear the water bubbles coming from the hole in the second photo
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    1964 85hp 850 I/L6 idel help

    Hey guys n girls I was wondering if anyone can help me out I had just finished rebuilding the carbs n fuel pump but me being the dummy I am forgot what the idel adjustment screw was seated at anyone have a clue on what the factory setting is at for a starting point ? Here's the problem it starts...
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    1964 Mercury 85hp 850 Inline 6 - MFG runabout I think??

    Hello folk I'm new to this form and new to boat ownership I have in my possession a 1964 Mercury 85hp 850 inline 6 as far as I could figure out from the serial # 1662924 and an MFG boat, not to sure of the model or year previous owner said 72' can't find out anything about it I'll post a pic...
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