Monster Fan M350
Class V-VIII*
SINGLE UNIT: For vehicles with engines up to 335 hp and at least 1,200 square inches of clear radiator core area.
DOUBLE UNITS: For vehicles with engines of 335-400 hp and at least 1,400 square inches of clear radiator core
area.
Caution:
Dual M350s in simultaneous operation will draw up to 100 amps. Vehicle operator must insure
adequate alternator capacity before installing dual M350 units.
* The Black Magic M350 may be used in smaller class trucks when there is adequate clearance for installation.
INSTALLATION INSTRUCTIONS
CONTINUE TO BACK SIDE TO COMPLETE THE INSTALLATION.
IMPORTANT NOTE:
Please read instructions completely before attempting installation. We recommend a thorough inspection of your radiator for any visual
defects (such as cracks or breaks in the side rails, radiator core or tank leaks) before continuing. The M350 is designed for installation on a
properly functioning cooling system and is not a substitute for regular system maintenance.
The M350 is packaged as a working unit. It is designed to function in a SUCKER MODE ONLY and should always be mounted on the
ENGINE SIDE of the radiator so that the fan faces the engine block.
REMOVE EXISTING FAN & SHROUD ASSEMBLY:
1. Remove plastic radiator cover, and top half of fan shroud (some shrouds are a single piece).
2. Remove fan and clutch assembly. If clutch is mounted to pulley with four bolts, remove nuts, remove clutch/fan assembly and replace nuts.
The clutch may be mounted by a large single nut. It may be possible to remove this clutch by fitting a large wrench to the nut. Put a rag over
the fan to keep from being cut. Hold the fan in place and pull the wrench in the direction of rotation, it may help to give the end of the
wrench a sharp strike from a soft-blow hammer to break the nut free without the pulley slipping.
3. Remove the lower shroud.
WIRE FAN MOTORS:
1. Each motor has two wires, one black the other blue. For this application the Black motor wire is Positive, and the Blue motor wire is
Negative. Locate the rolls of 10 GA red and black wire, and the yellow butt connectors. Attach the red 10 GA wires to the Black motor wires.
And the black 10 GA wires to the Blue motor wires. Now the red 10 GA wire will be positive (+) and the black 10 GA wire will be Negative
(-).
2. Wrap the connections with electrical tape, and use ‘zip-ties’ to
secure the wires away from the rotating fan blades.
3. Drill a small hole in the shroud to pass the 10 GA wires through to
the outside of the shroud.
INSTALL ELECTRIC FAN ASSEMBLY:
1. Look at the vehicle construction around the radiator for potential
mounting points. Mounting points should serve two purposes:
to carry the weight of the fan, and to hold the fan against the
radiator core. Cross braces, radiator mounting points, radiator
flanges, or side rails are possible points. Locate at least 4 points
to mount bracket to.
2. There are two different styles of brackets, and four mounting
straps included in the kit. (Diagram 1) These can be used to give
you the most options for mounting the fan to the radiator. The
mounting straps can be bent to reach around the radiator if
necessary. The long slot in the straps allows adjustment to the
tension of the fan mount against the radiator core.
3. We do not recommend mounting the brackets to the radiator core
so that the core carries the weight of the fan. In some applica-
tions this can cause damage to the core.
MOUNTING CONTROL MODULE:
1. A remote mounted control module is shipped with each M350.
A drawing of the control is shown as Diagram 2
2. Select a point near the fan where the control can be mounted. The unit is sealed so it can be mounted in the engine bay, but should be
protected from extreme heat. The firewall is a common mounting point. Using the control as a template,
mark hole locations and drill 1/8
”
holes.
CAUTION- Be sure it is safe to drill at this position and that nothing is behind this location.
3. Mount the control with the wires hanging down, so not to trap moisture.
Diagram 2
rev. 06-22-05 part no. 99993M Page 1 of 3
The Flex-a-lite Limited Warranty
Flex-a-lite Consolidated, 7213-45th St. Ct. E., Fife, WA 98424, Telephone No. 253-922-2700, warrants to the original purchasing user, that all Flex-a-lite products to be free of defects in material and
workmanship for a period of 365 days (1 year) from date of purchase. Flex-a-lite products failing within 365 days (1 year) from date of purchase may be returned to the factory through the point of purchase,
transportation charges prepaid. If, on inspection, cause of failure is determined to be defective material or workmanship and not by misuse, accidental or improper installation, Flex-a-lite will replace the fan
free of charge, transportation prepaid. Flex-a-lite will not be liable for incidental, progressive or consequential damages. Some states do not allow the exclusion or limitation of incidental or
consequential damages, so the above limitation or exclusion may not apply to you. This warranty gives you specific legal rights and you may have other rights, which vary from state to state. The Flex-a-
lite warranty is in compliance with the Magnuson-Moss Warranty Act of 1975.
BRACKETS PROVIDED: (Diagram 1)
(2 pages)
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