EY35, EY40 - Small Engine Discount

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1
6-2-4 MAIN SYSTEM
1) Remove the bolt (13) and take out float chamber
body (15).
2) Remove the main jet (17) and main nozzle (18), using
correct tool to avoid damage to it,
3) Reassembly
Fasten the main jet securely to the body. Otherwise,
the fuel may become too rich and cause engine malfunction.
6-2 -5 FLOAT SYSTEM
When removing the needle valve (21) and float (20), gently
tap the reverse side using the rod more slender than the
float pin (19) and remove because the float pin is calked to
the carburetor body.
*When cleaning the jets, use neither a drill nor a wire
(because of possible damage of the orifice which will
adversely affect fuel flow). Be sure to use compressed
air to blow them clean.
Fully tighten the pilot screw and then loosen it counterclockwise
by one turn for Model EY35, or one
turn and a half for Model EY40. When fully closing
the pilot screw, do not tighten it too hard. Otherwise,
the needle at the tip might become damaged.
Turn the throttle stop screw clockwise to a normal
idling speed of 1200 rpm.
Make a final adjustment when the engine is in normal
operating condition at normal temperature with the correct
I A ‘17
-18
19
Fig. 49
air cleaner mounted.
7. BREAK-IN OPERATION of REASSEMBLED ENGINE
An overhauled engine must be operated at low speed break-in the parts. A thorough break-in is indispensable particularly
when the cylinder, piston, piston rings or valves are replaced with new ones.
Thl e recommended break-in schedule is shown below.
LOAD
EY35 EY 40
NO LOAD
SPEED
2,500 rprn
TIME
10 minutes
NO LOAD
3,000 rpm
10 minutes
NO LOAD
3,600 rprn
10 minutes
3.5 HP
4.0 HP
7.0 HP I 8.0 HP ~
3,600 rpm
30 minutes
3,600 rpm I 60 minutes 1
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