Reply To: Fuel mixture Evinrude 18 HP Fastwin 1960

[salnaes]

Wow! Thank you all for helping me on this issue. I will use 24:1 with twc3 oil and perform break-in procedures in a test tank.

Break-in as follows:

1. Operate at 1/2 throttle for 2 hours (2500 – 3500 rpm)
2. Operate at different speed except full throttle the next 8 hours.

As soon as the engine starts I will check for water coming out with the exhaust. If not, I will stop the engine and check why it’s not cooling.

I will also have to adjust low speed and high speed on the carburetor, but the needles are already set to initial settings: 3/4 turn out on high speed and 1-1/2 turn out on low speed. Hope that’s right.

Synchronization  is already performed according to tune-up specs (center of the roller on cam mark when throttle shaft starts moving).  Manual Seloc.

Spark plugs gaps are set to 0.30” and I used the special timing tool and multimeter to set the points break. I don’t have a Buzz box, so I had to disconnect the leads from coil, condenser and stop-button to have the buzzer on the multimeter signal at the correct position. I’m pretty sure I didn’t move the point gap when fastening the leads after setting the break point. Ignition leads, spark plug caps and spark plugs are brand new. So I’m really exited now. Hope everything works.