Tecumseh OHH50 - 65 Technician's Handbook page 21

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On Walbro LMK and Series 7 carburetors, install the
throttle return spring on the throttle shaft with the
squared end up. Slide the foam dust seal over the
spring. Insert the throttle lever assembly into the
carburetor body with both tangs of the return spring
on the left side of the center boss (viewed from throttle
end) and the flat side of the shaft toward the carburetor
mounting flange. Install the throttle shutter to the
throttle shaft using notes or marks to place the shutter
as originally found (Series 7 must have the line on the
shutter at the 3 o'clock position) (diag. 44).
Always use new throttle shutter screws when
reinstalling. Install the screws so they are slightly
loose. Apply light downward pressure on the throttle
shaft and rotate it clockwise to seat the throttle shutter
in the bore, then tighten the throttle shutter screws.
Check for binding by rotating the throttle shaft. If
necessary, adjust the throttle shutter by loosening and
repositioning the shutter, then retighten the screws
(diag. 45).
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NEW WELCH PLUG
THROTTLE
PLATE
SERIES 7
THROTTLE LEVER
THROTTLE PLATE
WALBRO LMK SERIES
FLAT END PUNCH
SAME OR
LARGER
DIAMETER OF
PLUG HOLE
THROTTLE
LEVER
DUST SEALS