Master Lock MGR2900, MGR4500I, MGR6000I Storage, Servicing the Engine, Technical Service

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PORTABLE GASOLINE GENERATORS

STORAGE

WARNING:Removeallfuelfrom fuel tank before storing generator. Store fuel in approved container. Storefuelinawell-ventedareafree of open flames or sparks.

WARNING: The muffler be- comes very hot during operation. The muffler remains hot for a while after shutdown. Let engine cool before storing.

IMPORTANT: Keepgeneratorlevelwhilein storage. Never store generator upside down or standing on end.

Note:We supply the engine owner’s manual with generator. Refer to that manual for questions concerning engine storage.

Use a fuel additive, such as STA-BIL®or an equivalent, when storing generator with fuel in fuel tank. This will minimize fuel gum deposits from forming in engine.

Cover and store generator in a clean, dry place. Do not expose generator to extreme high or low temperatures during storage.

SERVICING THE ENGINE

Robin parts and services should be handled by your nearest authorized engine service firm. Visit:

www.robinamerica.com

or call Robin direct:

1-800-277-6246

TECHNICAL

SERVICE

You may have further questions about as- sembling, operating, or maintaining this product. If so, you can visit our Technical Service web site at www.desatech.com or contact our Technical Service Department at 1-800-858-8501 (English Only).You may also write to:

DESA Specialty Products™

ATTN: Technical Service Specialty Products P.O. Box 90004

Bowling Green, KY 42102-9004

When contacting DESA Specialty Prod- ucts™, have ready

•	Your Name
•	Your Address
•	Your Phone Number
• Model Number of Product
•	Serial Number
• Date of Purchase (Include copy of receipt
	for written requests).

TROUBLESHOOTING

Note: For additional help, visit DESA Specialty Products’™ technical service web site at www.desatech.com.

WARNING: Only a qualified electrical service person should service and repair generator. Use only factory approved replacement parts.

Note: See engine owner’s manual for engine troubleshooting.

OBSERVED PROBLEM	POSSIBLE CAUSE		REMEDY
No voltage when starting generator with no	1.	Loss of residual magnetism	1.	Apply 12-volt battery to capacitor ter-
electrical load				minals for 2-3 seconds
	2.	Winding short circuit or loose	2.	Check resistance of coils (see Electrical
		connections		Component Specifications, page 15)
	3.	Defective rotor diode	3.	Replace both diodes on rotor
	4.	Defective capacitor	4.	Replace capacitor
Voltage is less than normal voltage with no	1.	Engine speed too low	1.	Set engine speed to 3800 RPM (63 Hz)
electrical load				with no load
	2.	Defective rotor diode	2.	Replace both diodes on rotor
	3.	Partial short circuit in winding	3.	Check resistance of coils (see Electrical
				Component Specifications, page 15)
	4.	Defective capacitor	4.	Replace capacitor
Voltmeter reading more than 10% high with	1.	Engine speed too high	1.	Set engine speed to 3800 RPM (63 Hz)
no electrical load				with no load
Voltmeter reading correct with no electrical	1.	Defective rotor diode	1.	Replace both diodes on rotor
load, but more than 10% low when electrical	2.	Electrical load too high	2.	Do not overload generator
load is added	3.	Engine not running properly	3.	Contact an authorized engine service
				center

www.desatech.com

14 114716