the machinist
Senior Chief Petty Officer
- Joined
- May 7, 2002
- Messages
- 711
OK guys, those old time mechanics (or ones that are very familiar on magnetio ignition) I need a little clarification on point setting/ignition timing of a 1974-1976 9.9hp.
I have a reader of my 9.9/15hp repair articles who posed a question that I am unsure of. So off to my 1974 rope start & see if I can replicate his situation.
My motor is a rope start, but the flywheel appears to be for a electric start minus the electric start ring gear. Flywheel #481174 that has 2 sets of magnets composed of 3 individual magnets for each set, which by the factory service manual photos idicates a electric start flywheel.
I have a 1975 factory service manual & a hopeless Seloc manual. And have been on the http://www.outboard-boat-motor-repa... 5.5 HP 1954-1964 Ignition System Tune-up.htm a well written article for older OMCs, but not covering the 9.9.
But in pulling my flywheel I find markings that are not listed in either manual. On the underside of the flywheel are 2 sets of marks 180 degrees from each other. First up says "E SET POINTS B" & about 2 3/16" later "R SET POINTS T".
My question is just what do these inscriptions refer to. Initially I thought the E & R referred to Electric start & Rope start.
With the timing plate advanced to wide open & with the initial point setting of .020, all the wires disconnected from the points & using a multi meter I get the points to open on the "E SET POINTS B" as referenced to the reference mark protrusion on the front of the timing plate.
My motor runs at these settings. Just would like some calarification please.
I have a reader of my 9.9/15hp repair articles who posed a question that I am unsure of. So off to my 1974 rope start & see if I can replicate his situation.
My motor is a rope start, but the flywheel appears to be for a electric start minus the electric start ring gear. Flywheel #481174 that has 2 sets of magnets composed of 3 individual magnets for each set, which by the factory service manual photos idicates a electric start flywheel.
I have a 1975 factory service manual & a hopeless Seloc manual. And have been on the http://www.outboard-boat-motor-repa... 5.5 HP 1954-1964 Ignition System Tune-up.htm a well written article for older OMCs, but not covering the 9.9.
But in pulling my flywheel I find markings that are not listed in either manual. On the underside of the flywheel are 2 sets of marks 180 degrees from each other. First up says "E SET POINTS B" & about 2 3/16" later "R SET POINTS T".
My question is just what do these inscriptions refer to. Initially I thought the E & R referred to Electric start & Rope start.
With the timing plate advanced to wide open & with the initial point setting of .020, all the wires disconnected from the points & using a multi meter I get the points to open on the "E SET POINTS B" as referenced to the reference mark protrusion on the front of the timing plate.
My motor runs at these settings. Just would like some calarification please.
