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M26SS Customer Support
Horizon Hobby, Inc.
4105 Fieldstone Road
Champaign, IL 61822
1-877-504-0233
Problem
Engine won't start..................................
Engine won't turn over.........................
Engine starts, then stalls.......................
Engine performing poorly..................
Engine overheats...................................
Engine hesitates or stumbles.............
Engine stalls instantly when throttle
is fully opened from idle......................
Engine stalls while driving around
turns............................................................
Engine stalls while idling.....................
Troubleshooting Chart
Troubleshooting Chart
Things to Check
Out of fuel
Spoiled or improper fuel
Glow plug not lighting
Glow igniter battery low
Engine overheated
Engine flooded
Air cleaner blocked
Exhaust blocked
Engine is flooded
Engine seized
Idle speed set too low
Glow plug is fouled/weak
Air bubbles in fuel line
Engine is overheated
Insufficient fuel tank pressure/blockage
Hi-Speed fuel mixture is too rich
Engine overheating
Leaking glow plug
Carburetor dirty or blocked
Fuel bad or contaminated
Clutch or slipper slipping
Bound up drivetrain
Engine worn out
High-speed fuel mixture is too lean
Low-speed fuel mixture too lean
Spoiled or improper fuel
Cooling air is being blocked
Excessive load on the engine
Engine overheated
High-speed mixture too lean
Low-speed mixture too rich
Air bubbles in fuel line
Glow plug fouled
Glow plug fouled
High-speed mixture too rich
Low-speed mixture too lean
Fuel level is low
Idle speed set too low
Low-speed mixture too rich
Low-speed mixture too lean
Idle speed too low
Clutch shoes dragging
Clutch bearings failed
Engine worn out
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M26SS Customer Support
Horizon Hobby, Inc.
4105 Fieldstone Road
Champaign, IL 61822
1-877-504-0233
Remedy
Check/replace glow plug
Charge/change battery
Let cool - see "Testing the Temperature
Clean and reoil aircleaner
Loosen glow plug and try again
Damaged, if will not turn over
See "Carburetor Adjustments"
See "About Glow Plugs"
Check for split/hole in fuel line
See "Testing the Temperature"
Clear pressure line
See "Engine Tuning"
See "Engine Tuning" Richen 2 hours
Replace glow plug
Try fresh fuel
Clean/Adjust/Repair
Check for binds in drivetrain
Rebuild
See "Understanding Rich and Lean"
Clean head fins
Check for binds/dirt build up
See "Engine Tuning," richen 2 hours
See "Engine Tuning," richen 2 hours
See "Engine Tuning," richen 1 hour
Check fuel line for holes
Change glow plug
Change glow plug
See "Engine Tuning"
See "Engine Tuning," richen 1 hour
Add Fuel
Increase idle speed
See "Engine Tuning"
See "Engine Tuning"
Increase idle speed
Check for broken clultch springs
Check/Clean/Replace
Rebuild
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