Logo
FULL SITE MENU

1972 9.5HP Evinrude

You hook up the 12 volt battery to the timing light --------------Hook up # 1 sparkplug -------------Start engine and look at the 2 vertical marks on the magplate ---------------Timing mark for # 1 is on the bottom edge of the flywheel ,should fire right inbetween those marks.-------------Then check # 2.------------------------------------Now you can also set the points using an Ohmeter ( special dummy flywheel fixture ) or the flywheel itself.-----------I have used that method for over 40 years and it has often been entertaining trying to teach folks who have said -" can't be done " --or no need to do that.---------------------Frank Rob on the aomci -----site makes and sells those timing fixtures.
 
You need a inductive timing light.It will have 3 wires 1 + and 1 - to hook to ANY battery 12V, the other wire is to hook to a spark plug wire, to pick up the charge to the spark plug.I do #1 first then #2.As in post #18 The 2 single timing marks are on an edge , bottom of the flywheel. Spark should occur between the 2 vertical marks on the magneto plate.
 
Hi everyone......I hooked up the battery to the timing light and it seems that both plugs are firing good and the timing is AOK (its off to the left side of two marks but pretty close). I also checked the timing when It was in neutral and also when in forward and the mark stayed in the two lines even when I throttle up and the engine bogged down & smoked as usual so the timing seems AOK even at high speed. Since I'm running this engine in a grabage can filled with water, I always place the cover over engine when I decide to put it in gear and throttle up so no water splashes into engine compartment. Now here is the kicker which I never tried before. I decided for the first time to try the "high throttle test" with the engine cover off and PRESTO......IT TOOK OFF LIKE A BAT OUT OF HELL !!! The engine for the first time had so much power that I was afraid to throttle all the way up since the water was splashing all over the place !!!! So even though I feel great after all the work I put into it so far, I'm still at a loss to WHY ??? Its apparently not getting enough oxygen at high speeds when the cover is on but it runs great when the cover is off. I did the same test 3 times (cover off / cover on) and the same results. What's going on with this finicky engine !!! Eric
 
Back
Top