Exhaust
Use only factory-made exhausts pipes designed for this type of engine, preferably brand-name MVVS
engines with which you also get the power output guaranteed.
The manufacturer declines all responsibility for all engine damages arising from the use of improper
exhaust systems.
When mounting the exhaust follow the manufacturer’s instructions. Make sure to secure sufficient cooling
of the exhaust.
3270
compact, medium level of power output
3266
tuned pipe, with adaptor 3265 provides the highest power output, with the flat torque curve,
useful for the model planes
3266
3270 3265
Carburetor adjustment
Basic setting:
adjusting needle ( L ) for low RpM range 1 turn and 40 minutes
adjusting needle ( H ) for high RpM range 1 turn and 40 minutes
for WT 561
Minutes refer to hands of a clock. Values are only approximate and may vary with size of the propeller.
Walbro WT 561
The new engine comes adjusted to the basic setting.
After the engine has been run in, adjust it following the instructions below:
- start the engine and warm it up
- let the engine run at idle speed for approx. 5 seconds
Step I
Accelerate to 2/3 of the throttle range within approx. 1 sec (faster acceleration). Repeat three
times – if the engine accelerates quickly and without a hiccup go to Step III. If acceleration is not smooth
go on to Step II.
Choke
H- needle adjusting
screw
L- needle adjusting screw
Lever - throttle
Pressure pulse inlet
