Blowers · part-number series 4229
BG 45, BG 46, BG 55, BG 65, BG 85 · BR 45 C · SH 55, SH 85
52 exploded views, 1,254 part numbers.
BG 45, BG 46, BG 55, BG 65, BG 85
Factory tuning settings
| Idle speed | 2,800 rpm |
| Max speed | 6,500 rpm |
| L screw (low speed) | 1 turn |
| H screw (high speed) | 3/4 turn |
| Confidence | sourced |
Screw figures are turns open from lightly seated. Set the final mixture by ear and tachometer against the machine in front of you — running a two-stroke lean to hit a published number is how pistons get scored.
BR 45 C
SH 55, SH 85
Factory tuning settings
| Idle speed | 2,800 rpm |
| Max speed | 6,600 rpm |
| L screw (low speed) | 1 turn |
| H screw (high speed) | 3/4 turn |
| Confidence | sourced |
Screw figures are turns open from lightly seated. Set the final mixture by ear and tachometer against the machine in front of you — running a two-stroke lean to hit a published number is how pistons get scored.
Parts are not interchangeable across series — check yours before ordering.