Stihl 150 vs 151

[telejed]

Anyone know what the real differences are? I have a second hand 150 that I opened up the muffler on and defeated the carb limiters. Just finished doing the same on a second hand 151. Don't know yet if I like the 151, the 150 is fine for what it is, but does anyone know of differences?

Port Timing?
Spark Timing?
Anything?

 

[DND 9000]

The MS 151 has an revised engine to meet EU 5 stage exhaust gas limits. Cylinder, muffler and piston are different compared to the MS 151. The piston has a flared head. These are the main differences. There may be some other minor differences.

MS 150:

Displacement: 23,6cc
Engine power: 1,0kW
Max torque: 0,95Nm

MS 151:

Displacement: 23,6cc
Engine power: 1,1kW
Max torque: 1,1Nm

 

[telejed]

Thanks

 

[Ketchup]

Anyone know what the real differences are? I have a second hand 150 that I opened up the muffler on and defeated the carb limiters. Just finished doing the same on a second hand 151. Don't know yet if I like the 151, the 150 is fine for what it is, but does anyone know of differences?

Port Timing?
Spark Timing?
Anything?

The 151 has a popup piston and a chamber to match. Port timing is slightly different, ignition seems the same, but could have a small difference. I feel the 151 makes more power.