MUFFLER OS 46FX ENGINES 873S 25425020

This is the #873S OS Super Silencer Muffler used for the OS Max 40FX and 46FX Engines.

FEATURES:

• Direct Fit Optional Part.

• Natural Aluminum Construction.

• Three Expansion-Chambers Separated by Cone Baffles.

• Offers Appreciable Reductions in Noise Emissions.

• Exhaust Outlet and/or Pressure-Fitting Can Be Rotated To The Most Convenient Positions.

INCLUDES: 

• One 873S Muffler w/Pre-installed Pressure Fitting

• Two black steel 3x35mm Cap-Head Screws w/.5 pitch threads

• One Instruction Sheet

REQUIRES:

•  A 2.5mm hex wrench to install to engine 

SPECS: 

• Length: 175mm

• Diameter: 38mm at largest point including cooling fins

• Mounting Hole Centers: 37mm

Mouting Flange: 

• 44mm Wide
• 10mm Height
• 27mm Length from end of flange to muffler body
• 28mm Intake Port Height
• 6mm  Intake Port Width
•  

Exhaust Port Diameter:  

• 6.8mm ID
• 11mm  OD

Pressure Nipple: Length: 

• 14mm
• Diameter: 4.5mm line end
• Threads Length: 6mm
• Diameter: 3.5mm
• Pitch: .6