ENGINE DIAGNOSTICS (ALL MODELS)

8.3 ENGINE DIAGNOSTICS (ALL MODELS)

Engine Fails to Start

Check Oil Level

Check Fuel Level

Check Fuel Shut-off Valve Open

Confirm Choke in On Position

Check Spark Plug

Dry Spark Plug =

Check Carburetor

Fuel Cutout Solenoid

Wet Spark Plug =

Check Ignition System

Check Spark Plug Gap

Plug Condition Good =

Re-Gap Spark Plug

Plug Condition Dirty or Worn =

Replace Spark Plug

Check Ignition for Spark

Bright Blue Spark =

Reinstall Plug

Dull Spark =

Pull Coil & Check Resistance

Primary Coil = 0.8-1.0 Ohms

Secondary Coil = 5.9-7.1 Ohms

(measure at spark plug lead)

Replace Coil, if Necessary

Reinstall Coil with Proper

Coil / Flywheel Air Gap

Reinstall Plug

Drain Oil and

Check Low Oil Switch

Connection and Continuity

(Yellow Wire on Side of Engine)

Check Flywheel Woodruff Key

Repair or Replace Key

Perform Engine Compression Test

Engine Fails to Crank Using Electric Starter

Check Recoil for

Mechanical Binding

Check Battery Voltage

Higher than 12.5 Volts = Check Voltage Across Components

Less than 12.5 Volts = Charge or Replace Battery

Check Voltage Across Components

Check Battery Connections

Check Leads on Proper Post Check Leads are Clean & Tight

Check Voltage Across Components

are Within .5V of Battery Voltage

Replace Out of Spec Components

Check Engine Control Switch

Voltage

Drop in Start Position

Check Battery Post / Solenoid

Voltage Drop

Check Battery Post / Starter Lugs

Voltage Drop

NOTE: Generator has Charging Coil During Operation; Replace Coil if Repeated Battery Discharge

Engine Speed Unstable

Check Spark Plug & Gap

Check Ignition for Spark

Adjust Coil Air Gap

Check Spark Arrestor

Check Muffler Blockage

Check Governor

Frequency = 60 Hz + 3

Check Governor Assembly

Adjustment

Engine Starts

Then Shuts Down

Check Fuel Level

Check Fuel Quality

Confirm Choke in Off Position

Check Oil Level

Check Ignition for Spark

Check Spark Plug & Gap

Adjust Coil Air Gap

Check Fuel Line & Blockage

Check Carburetor

Check Spark Arrestor

Check Muffler Blockage

Engine Smokes

Start Engine

Warm to Operating Temperature

Observe Smoke Color

White Smoke =

Poor Fuel Quality

Black Smoke =

Check Choke Operation

Check Ignition System

Blue Smoke =

Check Oil in Fuel

Check Oil Overfilled

Check Worn Piston Rings

Perform Engine Compression Test

Engine Runs Rough

Check Fuel Level

Check Fuel Quality

Confirm Choke in Off Position

Check Air Cleaner

Check Ignition for Spark

Check Spark Plug & Gap

Check Fuel Line & Blockage

Check Carburetor

Check Spark Arrestor

Check Muffler Blockage

Check Valve Adjustment

Perform Engine Compression Test

Recoil Not Operating

Recoil Locked =

Disassemble and Repair Recoil

(see Manual Section

“Recoil Starter”)

Check Recoil for

Mechanical Binding

Rope Not Retracting = Disassemble and Repair Broken Ratchets or Springs (see Manual Section “Recoil Starter”)

8-10

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Honeywell Portable Electrical Generator Service Manual

Page 42
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Honeywell HW3000, hw400 service manual Engine Diagnostics ALL Models

hw400, HW3000, L specifications

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