Swisher E4-S4000, Owner'S/Operator'S Manual

14

139/150-Hour Maintenance

n

  Combustion chamber should be decar-

bonized, and the valve clearance should 

be adjusted. It is highly recommended 

that this is done by a Swisher-trained 

service technician.

n

  Replace the spark plug annually: Use 

only NGK CMR5H or equivalent  resis-

tor type spark plug of the correct heat 

range. Set spark plug electrode gap to 

0.024-0.028 inch (0.6 -0.7 mm).

NOTE:

The NGK CMR5H also meets the  requirements 

for electro magnetic  compliance (EMC).

Maintenance after first 139-hours, then every 150-hours thereafter.

1.  Remove cylinder cover, rocker arm cover, 

and spark plug.  Rotate the crankshaft 

while observing the piston through the 

spark plug opening. When the piston 

is at the top of the compression stroke 

(TDC), the valves can be adjusted.

2.  Loosen adjuster locknut so that the 2.5 

mm Allen socket head adjustment screw 

can turn freely. 

3.  Insert 0.10 mm (0.004") feeler gauge 

between valve stem tip and rocker arm. 

4.  Turn adjustment screw (clockwise = 

tighter, counter-clockwise = looser) until 

feeler gauge is almost snug.  Back off 

just enough to allow gauge to slip out 

6.  Turn engine over several times, and re-

turnthe  to TDC-compression. Recheck 

with proper feeler gauge to make sure 

clearance adjustment did not change 

as a result of tightening the locknut. 

Readjust as necessary. 

7.  Replace rocker arm cover gasket to as-

sure proper sealing and install cover.

CAUTION!

n

  Performing a valve adjustment 

incorrectly may cause hard starting 
and/or can damage the engine.

n

  If you are unfamiliar with this engine 

or uncomfortable with this proce-
dure, consult with an authorized 
Swisher servicing dealer. 

with limited resistance. 

5.  While holding the adjustment screw in 

place with the Allen driver, tighten the 

locknut with a wrench. 

IMPORTANT!

If a new gasket is not available and/or the 
old gasket is not damaged, the old gasket 
may be reused. Never use cracked or 
damaged gaskets! 

Spark Arrester Screen Maintenance

If the engine becomes sluggish and low on pow-

er, check and clean the spark arrester screen.

WARNING!

Never operate the unit with a  damaged 

or missing muffler or spark arrester! 
Operating with a missing or damaged 

spark arrester is a fire hazard and 
could also damage your hearing.

1.  With a 3 mm hex wrench remove the  3 

engine cover screws and the engine cover.

2.  With a 4 mm hex wrench remove the 3 

muffler bolts and the muffler.

3.  With a small flat bladed screwdriver 

remove the 2 screws holding the spark 

arrester screen and cover to the muffler. 

4.  Remove the screen and clean it with a 

stiff bristle brush.

5.  Inspect the cylinder exhaust port for any 

carbon buildup.

6.  Reassemble the spark arrester, muffler 

and engine cover in the reverse order of 

disassembly.

IMPORTANT! 

If you note excessive carbon buildup, consult 

with an authorized E4 Swisher servicing 

dealer. Contact Swisher Inc. at (800) 222-8183, 

or go to www.swisherinc.com for assistance.

Figure 32

Muffler  Bolts

Spark Arrester 

Screen

Cover

Cover 

Screws

Muffler 

Gasket

Engine Cover 

Screws

Muffler 

Spark Arrester 

Cover

These instructions refer to Figure 32.

Valve Adjustment