Table of Contents
Advertisement
OTHER TROUBLES
ENGINE SPEED DOES NOT INCREASE
1
No.
Check the spark plugs for dirt and check the spark plug
2
1
gap.
2
Check the air filter element for dirt.
3
3
Check spark arrester, muffler and air filter.
4
Check the valve clearance.
4
(Refer to "ADJUSTING THE VALVE CLEARANCE" on
page 2-9)
5
Check the compression pressure.
6
5
(Refer to "MEASURING THE COMPRESSION PRES-
SURE" on page 3-1)
7
Check governor setting.
6
(Refer to "INSTALLING THE CARBURETOR ASSEMBLY"
8
on page 4-5)
Check the valve face and valve seat for wear.
7
9
(Refer to "VALVES" on page 3-26)
Check if the marks on the crankshaft and camshaft are
10
aligned.
8
(Refer to "INSTALLING THE VALVE LIFTERS AND CAM-
SHAFT" on page 3-44)
Check if there is seizure, wear, or damage on the piston,
piston ring, or cylinder.
9
(Refer to "PISTONS, CAMSHAFT, CRANKCASE, AND
CRANKSHAFT" on page 3-37)
Check if the main passages, such as the carburetor assem-
10
bly, are clogged.
Check if there is air suction from the carburetor assembly
11
joint, gasket, or throttle shaft.
Checking steps
6-4
Possible remedy
Clean, adjust, or replace the spark
plugs.
Replace the air filter element.
Clean or replace spark arrester, muffler
and air filter.
Adjust the valve clearance.
Too high:
Decarbonize the combustion chamber if
there is carbon deposits.
Too low:
Next checking steps.
Adjust the governor.
Resurface or replace the valve face and
valve seat.
Correct.
Rebore or replace.
Clean the parts.
• Tighten the carburetor assembly nuts
securely.
• Replace the carburetor assembly joint
or gasket with a new one.
- Quick Links:
- Replacing the Engine Oil
Hide quick links:
Advertisement
Table of Contents
