Troubleshooting Guide - SH Engines SH .12 Manual

This troubleshooting guide has been provided to help you diagnose and solve most problems that you may encounter with
your SH .12 Turbo Modified On-Road engine. Most problems encountered can be solved by carefully following the problem-cause-
solution sections below. If you cannot solve the problem using this troubleshooting guide, please feel free to contact us at the address
or phone number listed at the bottom of this page.
PROBLEM
1) Engine does not start
2) Engine does not draw fuel
3) Engine does not transition
4) Engine overheats
5) Engine vibrates excessively
6) Engine does not idle down
All SH engines returned for warranty service must be within the warranty terms as stated on the warranty card provided with your engine.
Do not return the engine to the place of purchase. They are not authorized or equipped to perform warranty work on SH products. When
requesting warranty service, please observe the following guidelines:
Always send the complete engine including the carburetor. The engine must be removed from the model.
Include a note detailing the problem or service you are requesting. Service cannot be provided without this information. Include your daytime phone
number in the event we need more details pertaining to the service requested.
You may request an estimate of services at the time you return your engine for service. An omission of this request implies permission for Global
Services to service your engine at our discretion.
Include a method of payment for any service charges. If not specified, the unit will be returned to you C.O.D.
Send the engine to us by United Parcel Service, Federal Express or by Insured Mail. Postage is not refundable. Send to:
Phone (714) 963-0329

TROUBLESHOOTING GUIDE

CAUSE
A) Failed glow plug
B) Glow Starter not charged and/or faulty
C) Idle mixture screw set too lean
D) Old or contaminated fuel
E) Engine flooded with too much fuel
F) Air leak in fuel system and/or engine
A) Air leak in fuel system and/or engine
B) High speed needle valve fully closed
C) Idle mixture screw set too lean
D) Fuel lines kinked
E) Defective fuel tank
A) Failed and/or wrong type glow plug
B) Old and/or wrong type fuel
C) High speed needle valve set too rich
D) Idle mixture set too lean
E) Idle mixture set too rich
F) Air leak in fuel system and/or engine
A) Engine running too lean
B) Body too Restrictive
C) Wrong type of fuel used
D) Engine not fully broken in
A) Engine and/or engine mounts loose
A) Idle stop screw out of adjustment
B) Air leak in fuel system and/or engine
C) Glow plug heat-range too cold
RETURNING FOR WARRANTY SERVICE
Global Services 18480 Bandilier Circle
Fax (714) 964-6236
A) Replace glow plug with a new one
B) Fully charge glow starter and/or replace
C) Reset idle mixture to factory setting
D) Replace with new fuel
E) Remove glow plug and expel fuel from cylinder
F) Replace fuel lines and/or tighten all engine bolts
A) Replace fuel lines and/or tighten all engine bolts
B) Reset high speed needle valve to factory setting
C) Reset idle mixture to factory setting
D) Check and straighten fuel lines
E) Replace fuel tank
A) Replace with new recommended glow plug
B) Replace with new recommended fuel
C) Reset high speed needle valve to leaner setting
D) Set idle mixture richer
E) Set idle mixture leaner
F) Replace fuel lines and/or tighten all engine bolts
A) Richen high speed needle valve
B) Open larger vents in body to allow air to enter and exit
C) Use fuel recommended only for R/C cars
D) Allow engine further break-in time
A) Tighten all engine mounting bolts
A) Adjust idle stop screw so carb barrel stays open 1mm
B) Check fuel lines, tank and engine bolts. Verify carb is
seated and tight
C) Use a hotter heat-range glow plug
Fountain Valley, CA 92708
Email: service@globalhobby.com
SOLUTION