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