A Blast from the Past: OS 40 FSR ABC

Today's post is a blast from the past. I recently purchased a NIB OS 40 FSR ABC 2 stroke engine. This engine was introduced to the market in 1975 and had a production run through the early 80's. I am not entirely sure when this engine was discontinued but the SF series of engines replaced it. The 40/46 SF engine hit the market in 1987 so this engine was available up until that time at least.

The box artwork looks to be from the early 80's so I have a real classic here. Today I decided to shoot some videos of how I setup a 2 stroke engine for the first time running it. I have 3 total videos to include the first run and the third run where I begin to set the high speed needle, followed by setting the low speed needle for proper idle.

Initial setup

The first run

Second run/tank. You can see the high and low speed needles still need to be set. That is what I do in Part 3.

Part 3. High and low speed needles set.