Trouble Shooting Quick Guide

Description

Problem

Solution

Engine will not start
Out of fuel
Fill fuel tank
Improper or contaminated fuel
Replace fuel
Glow starter not charged
Charge glow starter
Glow plug bad
Replace glow plug, see "Glow Plug Problems"
Engine flooded
See " flooding" section.
Engine overheating
Allow engine to cool, richen fuel mixture, check airflow
Carburetor incorrectly adjusted
Readjust carburetor
Exhaust blocked
Clean exhaust system
Air cleaner blocked
Clean air filter
Starter will not pull
Engine is flooded
Clear excess fuel, see "flooding" Section.
Rope is jammed
Repair starter.
Engine seized
Examine engine for damage.
Engine starts and
then stalls
Idle speed set too low
Increase idle speed.
Air bubbles in fuel line
Check for holes in the fuel line.
Glow plug is fouled
Replace glow plug, see "Glow Plug Problem" section.
Engine is overheated
Allow engine to cool, richen fuel Mixture, check airflow
Insufficient fuel tank pressure
Replace pressure hose- clear
Blockage at exhaust header fitting
Check flow to and from the tank.
Engine sluggish /
poor performance
High-speed fuel mixture is too rich
Set high-speed mixture to a leaner setting
Leaking glow plug
Check glow plug gasket
Fuel bad or contaminated
Replace fuel
Carburetor dirty or blocked
Clean Carburetor
Engine overheating
Stop the engine- find the cause
Engine over geared for application
Use a lower gear ratio
Clutch slipping
Replace clutch shoes
Bound up drive train
Find the bound item and repair
Engine overheats
High-speed fuel mixture is too lean
Richen high-speed mixture
Cooling air is being blocked
Get air to the head
Excessive nitro in the fuel
Use fuel with lower nitro
Excessive load on the engine
Check for bound up drive train
Low-speed mixture too lean
Richen low-speed mixture
Engine hesitates or
stumbles
High-speed mixture too lean
Richen high-speed mixture.
Low-speed mixture too rich
Lean low-speed mixture.
Engine overheated
Stop the engine and find the cause.
Air bubbles in fuel line
Check for holes in fuel line.
Glow plug fouled
Test or replace plug
Engine stalls instantly
when throttle is fully
opened from idle
Glow plug fouled
Replace glow plug.
Low-speed mixture too lean
Richen low-speed mixture.
High-speed mixture too rich
Lean high-speed mixture.
Engine stalls while
driving around turns
Fuel level is low
Add fuel
Idle speed set too low
Increase idle speed.

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The Engineering Diploma - A Barking and Dagenham Resource