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  1. M

    Maximum Spark Advance vs. Full Throttle Advance

    I've got a 1969 Merc 20 hp and the SELOC manual. It explains the Full Throttle Advance setting (.275 BTDC) fairly elaborately and I've got a good handle on setting that, but it also references the Maximum Spark Advance (.375) in the appendix, and I'm not sure what they are talking about. I'm...
  2. M

    Prop Thrust Washer

    Anybody know if there is supposed to be clearance between the prop thrust washer and the bearing carrier/oil seal, and if so what it should be? Thanks.
  3. M

    Thrust Hub Clearance or Carrier length

    The bearing carrier in my 1969 20hp merc broke, and I'm fabbing a new one at our shop. I need to know what the clearance between it and the thrust hub should be, to get a correct overall length for the carrier. If someone knows what the carrier (34402T4) length should actually be, that would be...
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