The Yahoo Monaco owners group does not list any numbers...I already tried that.
*Read to the last part of this post:The Fleetwood # crosses to Donaldson # 537448, not 88 and I could not find a 537488
537448
Air Filters Product Attributes
Inlet Diameter: 7.00 Inches (178 MM)
Outlet Diameter: 7.00 Inches (178 MM)
Body Diameter: 11.00 Inches (279 MM)
Body Length: 24.00 Inches (610 MM)
Rated Flow HR:
1200 CFM (33.96 CMM)
Restriction HR: 5 In H2O (127 MM H2O)
A 537449 has the most flow of any Donaldson disposable filter I could find that might fit although the diameter is bigger.
Air Filters Product Attributes
Inlet Diameter: 7.00 Inches (178 MM)
Outlet Diameter: 7.00 Inches (178 MM)
Body Diameter: 13.50 Inches (343 MM)
Body Length: 24.00 Inches (610 MM)
Rated Flow HR:
1500 CFM (42.45 CMM)
Restriction HR: 5 In H2O (127 MM H2O)
I would check your filter minder by resetting and then rev the engine to 1500 and check the reading which should still be in the green and then again when you rev to 2000.
*A fleetguard AH8505 appears to be the same size and it is rated
1730 CFM. This may be your best option if you cannot go with a 13.5" Diameter.
PS: There is one on
Ebay for $200 but it is listed as a 537449 replacement. Save your current air filter as I'll be in AZ this fall :W