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  1. J

    Tohatsu M50D2 Ignition timing question

    I have a new Tohatsu M50D2 and carrying out the 10 hour service stuff from a genuine Tohatsu service manual.<br /><br />Section 14 - Link Adjustment - specifies that the ignition timing should be set to 24degree BTDC (M30D) at full throttle and 3degrees BTDC with throttle closed. The motor...
  2. J

    Thunderbolt ignition trigger

    Hi guys,<br /><br />I have a problem with a 1970ish 650SS. I did a carb strip and clean at the beach the other day and forgot to re-connect the main battery ground wire to the engine block after re-assembling the unit. It re-started OK (the wire must have been touching the frame) and ran OK...
  3. J

    help with shift shaft!

    Hi all<br /><br />I have a horrible problem with the lower end on my merc 650SS (about 1970). I took the lower end off and the shift shaft stayed in the upper end! :( . The shift mechanism is an early Cam-shift type 1<br /><br />No problem I thought - I'll just replace the impeller (which is...
  4. J

    Tacho connection on Mercontrol

    I have an old Merc (650SS) about 1969-70 and I need some information on the Tacho signal. The tacho wire is connected to the power pack in the motor. Does it produce one pulse per revolution or is it one pulse per spark (4 sparks per rev)?<br /><br />I know some tachos use the stator pulses...
  5. J

    Yamaha air cooled model?

    I have recently bought an old Yamaha air cooled outboard (as an aux on a boat) and I can't identify it. It is air cooled pull start with a built in tank. The tank is dark green and the rest of the body is cream. The serial number has been partly obliterated - it is 0528?.<br /><br />Anyone...
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