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    84 Black Max 150 shift shaft bushing

    Plastic shift shaft bushing is broken and I cannot locate just the bushing. Anyone have a part number I could order?
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    84 Black Max 150 runs hot at full throttle

    Motor runs at normal temp when run at 3500 rpm or less. Anything over makes motor run hot. New water pump (pressure is maxed out), rebuilt poppet valve, new thermostats, new head gaskets. Installed new temp gauge with new sender attached to port side. The overheat light is wired to sender on...
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    84 Black Max 150 runs hot at full throttle

    Motor has new stats and complete new water pump (both twice) but tends to run hot above 3200 rpm. It has excellent water pressure and pee stream and at 3200 doesn't run over 160 degrees. Above 3500 to around 4000 rpm the temp will immediately go to 240 degrees and start steaming. Throttling down...
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    84 Black Max Temp Guage Sender

    My 84 Black Max has the OT sensor on the starboard side but I want to add a guage. On the port side the opening for the sender is plugged. I don't know if it is pressed/screwed in (my eyesight is not so good anymore) but I need to remove it in order to add the sender. I have ordered the sender...
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    78 20 hp starter wanted

    I am looking for a starter for my 1978 Merc 200 (and the bracket that holds it on) My research shows that this starter was only used on 78,79, and 80 year models and it is no longer available. I can't find one locally even in a couple of boat salvage yards. The Mercury part no. is 76275.
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    72 Ted Williams 7.5 unavailable part

    I have a 72 Ted Williams 7.5 hp model 217.59450. The boot on the shift rod has disintegrated and the part is no longer available. Part no. 56051. Any ideas on how to fabricate one or does anyone out there have one?
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    Jonboat info needed

    Recently purchased an old jonboat and I can't find any info on the triple w about it. The faded tag on the boat looks like Polar Manufacturing but the boat registration card says it is an Eagle One. 14' riveted construction flat bottom and 3' across the floor rated for 20hp. Anyone know anything...
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    787 RFI oil line question

    There are two lines from the bottom of the oil tank. One goes to the oil pump and the other larger line to the lower starboard side of the engine. What is the purpose of the larger line?
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    2000 SeaDoo won't charge

    2000 GTX RFI 5648 will not charge the battery. It is an almost new battery. I removed the battery, filled with distilled water and fully charged it. I cleaned the battery leads and the plug in leads on the module and then started the machine. With a digital VOM attached to the battery the...
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    Finally Fixed!! Low RPM Issue

    I have fought tooth and nail for months an issue with low rpm at wot on a Merc 50 1985 2 stroke 4 cyl. I have dealt with the stator, trigger, carbs, switch box and everything else on the advice of outboard mechanics with no success. The engine would just bog down after about 2400 rpm. The last...
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    Too much motor?

    I have a mid 80s Suntracker 24 party barge that is rated for a 115hp. Original motor is a 50hp Merc 4 cyl 2 stroke. I have acquired a 150hp Black Max V6 2 stroke that I am considering putting on this boat. My machine shop buddy tells me that beefing up the transom with new welded aluminum will...
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    1984 Black Max 150 Exhaust Tube

    Recently acquired this motor and in doing some PM I pulled the lower unit to install new water pump. Something did not look right. Am I mistaken or is the exhaust tube missing? Serial # 6568407 All cylinders compression test 120-125. Good enough?
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    115 Mariner Pee Stream Cold

    90's Mariner 115 4 cyl 2 stroke. Owner says the motor has always been "cold natured". I replaced the thermostat and rebuilt the poppet assembly. We ran it on muffs and the water coming out of the pee hose is as cold as the water going into the muffs. This is not normal is it?
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    what kind of paint to use?

    Re: what kind of paint to use? I totally agree with that preparation is the key to a successful paint job. I had my metal pieces sandblasted while I had it apart and it had that matte looking finish as previously mentioned. They were painted as pieces. Duplicolor seft etching primer, then...
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    Engine swap: 50hp to 150hp

    Re: Engine swap: 50hp to 150hp As you can see from the photos, the original controls configuration will be a much cleaner job than trying to change to the Quicksilver controls. I was mistaken about the separate cold start lever on the Qucksilver.
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    Engine swap: 50hp to 150hp

    I have a 24' pontoon with a '85 50hp #A131285 and I have aquired an '84 Black Max 150hp #6568407. I am considering swapping the 50 for the 150 and aside from beefing up the transom I want to know if the controls for the 50 will work on the 150. I have all the controls for the 150 but it would...
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    Identify this?

    1985 50hp 4 cyl 2 stroke serial #A131285 I found this part on the floor after removing power head and exhaust plate. Can't find it in the parts drawings and haven't a clue where it came from. Anyone know what it is and where it goes?
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    End cap removal

    I have seen reference on a couple of posts about a tool to remove the lower crank end cap from a Merc powerhead. Can someone tell me basically how this tool works? I have a buddy that owns a machine shop that I'm sure could fabricate a tool if we know the principle of how the thing works. By the...
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    Lower crank end cap removal

    '85 50hp 4 cyl 2 stroke serial #A131285 needs new lower crank seals. I have the bolts out of the cap but it seems really tight. What can I do to remove the cap without splitting the case? Also would heat help to remove the cap and the exhaust extension plate from the drive shaft housing?
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    '89 Mariner 115 4 cyl linkage

    Engine was damaged in a storm and has since been rebuilt. Linkage problem is that the trigger is at full advance even when throttle is in idle mode. Can't see any parts missing so what holds the trigger at retard when in idle?
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