"Rick, The fuel mix is 50::1.
"Rick, The fuel mix is 50::1. I have attached a troubleshooting procedure for the ignition system, courtesy of a Mercury inline engine mechanic. The ignition components on that motor are expensive. I recommend you use the procedure to isolate the problem. Also, if that motor has a distributor, the rotor is non-removable.
I think this is what you need, pretty sure Clams has posted this here before so I wanted to give him his due credit;
MERCURY BATTERY-POWERED CDI TEST
FOR DISTRIBUTOR MODELS
This test is for the 332-2986 switchbox used from 1967-1978 on all the inlines.
This test assumes your coil is good (most all are).
DISCONNCT BATTERY
1. Turn off ignion
2. Disconnect all 3 wires on the distributor side of the switchbox.
3. Remove the HV lead from the coil to the center cap (remember it unscrews
from cap)
4. Reconnect that HV center lead to the COIL side only.
5. Position that HV lead about about 3/8" from ground (block, shrouds etc)
and find a way to hold it there.
6. Jumber the brown and white terminals on the dist. side of the switchbox
together.
RECONNECT BATTERRY
7. Check that you have +12 V at red terminal.
8. Turn on ignition and verify +12V at white terminal (on red terminal side)
9. Touch the black terminal to ground - unit should cause spark each time
you touch ground.
If that passes and it won't fire at all, suspect the trigger"
