Makita EM4350LH, EM4350UH, EM4351UH Carburetor section, DISASSEMBLING/ Cleaning Carburetor

P 14/ 22

Repair

[4]DISASSEMBLY/ASSEMBLY

[4]-10. Carburetor section

DISASSEMBLING Fig. 58

Fig. 59

(1)Press down the tab of Cleaner plate assembly gently and separate Air cleaner cover from Cleaner plate assembly by loosening M5x20 Hex socket button head screw. (Fig. 1 of [4]-2.)

(2)Remove Air cleaner element. (Fig. 58)

(3)Remove two M5x60 Hex socket head bolts that fasten Carburetor assembly and Cleaner plate assembly to Insulator complete. (Fig. 59)

Note: Remove the bolts completely, or Carburetor cannot be removed from Insulator complete.

(4)Remove three tubes from Carburetor assembly, then separate Carburetor assembly from Engine.

Air cleaner element

M5x60 Hex socket

head bolt (2 pcs.)

DISASSEMBLING/ CLEANING CARBURETOR

(1)Remove four Pan head screws, then separate Metering cover, Metering diaphragm and Metering diaphragm gasket from Carburetor. (Fig. 60)

Note: If Metering diaphragm gasket is sticking on the adjacent part, remove it with care because it is easily broken.

(2)Check Metering diaphragm for shrinkage, hardening or breakage due to aged deterioration. If any, replace it with a new one.

(3)The inner parts of Pump body assembly can be removed by separating the pan head screw designated in Fig. 61.

(4)Before mounting the inner parts of Pump body assembly in place, make sure that the tip of Inlet needle is neither worn nor deformed. (Fig. 62)

Note: The inner parts are not available individually. If you need any of the inner parts, order Pump body assembly.

(5)When mounting Control lever, make sure that the upper end of Spring is firmly held in place under the projection of Control lever. (Fig. 63)

(6)Remove the pan head screw of Pump cover. (Fig. 64)

(7)Make sure that Inlet screen is not clogged, then set it back in place. (Fig. 65)

(8)Spray Carburetor cleaner in all the fuel lines of Carburetor, then after several minutes, wash out dirt and debris with clean gasoline.

Fig. 60 Fig. 61

Pan head screw (4 pcs.)	Inner parts of Pump body assembly
	Pan head screw	Pin
	Inlet needle	Spring
	Control lever
Carburetor		Pump body assembly

Fig. 62		Fig. 63
with good tip	with worn tip	Correct assembling	Wrong examples
		of the inner parts of
		Pump body assembly
		Metering diaphragm	Control lever is not parallel
			to Pump body assembly.
An Inlet needle with		Control lever
		Spring
worn tip can cause
a pressure leak.		Inlet needle	Debris in valve seat can	The upper end of Spring
			cause a pressure leak.	is out of place.

Fig. 64		Fig. 65
Pump cover	Pan head screw	Inlet screen
		Carburetor body