Snapper 1650 Series User Manual

SECTION 6 - ENGINE SERVICE & REMOVAL
Since extensive repairs and overhaul of the engine are to be handled by dealers authorized to
do so by the engine manufacturer, only certain routine service adjustments plus the procedures
for removing and reinstalling the engines are covered in this section. The procedures differ in cer¬
tain areas for the single and twin cylinder engines and are covered separately in this section.
ENGINE TROUBLE SHOOTING GUIDE
HARD STARTING OR LOSS OF POWER
1. Faulty ignition. (See Section 7).
a. Leads grounded or loose.
b. Breaker points faulty or improperly
gapped.
c. Spark plug faulty or improperly gap¬
ped.
d. Coil or condenser defective.
2. Faulty Carburetion.
a. Fuel line or filter clogged (dirt, gum,
etc.).
b. Fuel pump faulty.
c. Carburetor dirty or improperly ad¬
justed.
3. Poor compression.
a. Head loose or gasket leaking.
b. Valves sticking or leaking.
c. Piston rings worn.
WON'T START
Check interlocks switches. (See Section 7).
1. If engine won't crank check neutral
return brake pedal, rear PTO switch and cir¬
cuit breaker.
2. If engine cranks but does not start check
seat switch.
OPERATING ERRATICALLY
1. Clogged fuel line.
2. Water in fuel.
3. Vent in gas cap plugged.
4. Faulty fuel pump.
5. Gasket leaking (carburetor-manifold).
6. Governor improperly set.
7. Carburetor improperly adjusted.
KNOCKING
1. Fuel octane too low.
2. Ignition timing wrong.
3. Carbon build-up in combustion chamber.
4. Engine overheated.
OCCASIONAL SKIP AT HIGH SPEED
1. Spark plug fouled, faulty or gap too
wide.
2. Ignition timing wrong.
3. Carburetor improperly adjusted.
4. Breaker points faulty or improperly ad¬
justed.
OVERHEATING
1. Air intake screen or fins clogged.
2. Oil level too high (or low).
3. Fuel mixture too lean.
4. Ignition timing wrong. Spark too far ad¬
vanced.
5. Engine overloaded.
6. Tappet clearance too close.
IDLES POORLY
1. Idle speed too low.
2. Idle fuel improperly adjusted.
3. Gasket leaking (carburetor-manifold).
4. Spark plug gap too close.
BACKFIRING
1. Carburetor set too lean (main fuel).
2. Breaker points improperly gapped
(timing).
3. Valve sticking.
V-T
6.1

Snapper 1650 Series Specifications

General

Brand	Snapper
Model	1650 Series
Category	Lawn Mower
Language	English