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    Can't get motor to throttle down!!!!!

    I have a 1974 Mercury 200 (20hp) and I am unable to get my motor to throttle down. It is a cable steer motor, so I unhooked the cables and manually moved the throttle but in every position it is at full throttle in every gear. From the moment I start the motor, it runs at full throttle, in...
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    How to remove the drive shaft and bearing carrier assembly

    I have a 1974 Mercury Thunderbolt 200 20 hp serial #4020493. The lower unit on this motor had a busted up bearing carrier and housing. I bought a 1974 short shaft lower unit and am in the process of removing the old drive shaft and placing it in the new lower unit but I do not know how to...
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    74' Thunderbolt with lower unit troubles...........

    I have a 1974 Mercury Thunderbolt (20hp) 200 that had a piece break in the lower unit. I can get a replacement part, but I am having troubles getting the broken piece out of the lower unit. The threads are also a bit beat up but my main problem is getting the broken piece out. Thanks. And one...
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    Lower unit problems......

    I have a 1974 Mercury Thunderbolt 20hp with lower unit damage. The threads are broken and smashed together and will not allow the BEARING CARRIER ASSEMBLY part to screw in before the prop is put on. It is the threads that are on the inside of the lower part of the gear casing. Any ideas on where...
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    Mercury 1974 lower unit problems??????

    I have a 1974 mercury thuunderbolt 20hp and the threads on the lower unit by the prop are all beat up and I think it needs replaced and I am having trouble finding one. I did find a 1974 40hp lower unit but I am not sure if the two motors use the same lower unit or not.
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