Variable Speed Page 2 – Air / Mounting / Lube / Exhaust
John Deere Marine Variable Speed Engine Application Review Form – April 2025
Complete the Variable Speed Auxiliary Engine Application Review one page at a time.
Air Intake (AG03)
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Engine Within Enclosure or Engine Room
Yes
No
Air Filter
Standard
Other
Air Filter Other Description
Total Engine Room Intake Vent Area
in²
cm²
Total Engine Room Exhaust Vent Area
in²
cm²
Intake Fan
Yes
No
Intake Fan Rated Flow
CFM
Exhaust Fan
Yes
No
Exhaust Fan Rated Flow
CFM
Remote Mounted Air Filter
Yes
No
Remote Air Filter Diameter
in
cm
Remote Air Filter Pipe Length
ft
m
Remote Air Filter Number of 45° Elbows
Remote Air Filter Number of 90° Elbows
Comments
Engine Mounting (AG27/AG23.5)
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Engine Installation Angle
°
Installation Angle Direction
Nose Up
Nose Down
Dipstick Re-marked
Yes
No
Type of Mounting
Solid
Isolated
Number of Mounting Points
Engine lift straps must be removed after engine installation.
Engine Lift Straps Removed?
Yes
No
Lube Oil System (AG23.5)
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CCV
Closed System
Open System
Duplex Oil Filter
Yes
No
Remote Mounted Oil Filter
Yes
No
Comments
Exhaust System (AG17.5)
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Exhaust Type
Dry
Wet
Adequate Flex
Yes
No
Exhaust Outlet Above Waterline
Yes
No
Exhaust Wrapped
Yes
No
Wet Exhaust Elbow
Deere
Other
Wet Exhaust Elbow Other Description
Muffler
Yes
No
Exhaust Muffler Make/Model
Exhaust Pipe Length
ft
m
Exhaust Pipe Diameter
in
mm
Exhaust Piping Material
Number of 45° Elbows
Number of 90° Elbows
Turbo Outlet Pipe Supported
Yes
No
Comments