|
New
Part No.
|
Old
Part No.
|
Description
|
Model
|
Model
No.
|
|
-
|
6834
|
Snap
Ring |
DF |
4825
|
|
10-4801
|
4801
|
Crankcase |
Aero |
4800
|
|
10-4802
|
4821
|
Crankcase |
DF |
4825
|
|
10-4803
|
7501
|
Crankcase |
Pro
OB
Semipro OB |
7500
7510
|
|
11-4801
|
4806
|
Head
(Gold) |
Aero |
4800
|
|
11-4802
|
4836
|
Finned
Head |
DF |
4825
|
|
11-4821
|
7527
|
Head
Button/combustion chamber |
Semipro
OB |
7510
|
|
11-4822
|
7528
|
Cooling
jacket |
Semipro
OB |
7510
|
|
11-4823
|
7509
|
Air
Cooled Head |
Pro
OB |
7500
|
|
15-8702
|
7514
|
Wrist
Pin |
Aero
DF
Pro OB
Semipro OB |
4800
4825
7500
7510
|
|
16-4801
|
4823
|
Connecting
Rod |
Aero
DF
Semipro OB |
4800
4825
7510
|
|
16-4802
|
4829
|
Connecting
Rod |
Pro
OB |
7500
|
|
17-4801
|
4808
|
Crankshaft |
Aero |
4800
|
|
17-4802
|
4826
|
Crankshaft |
DF
Inboard |
4825
7525
|
|
17-4821
|
7506
|
Crankshaft |
Pro
OB
Semipro OB |
7500
7510
|
|
18-8446
|
8446
|
Ball
Bearing - PTO Top or Bottom |
Pro
OB
Semipro OB |
7500
7510
|
|
18-8778
|
8778
|
Ball
Bearing - Front - High RPM |
Aero
DF
Inboard
Pro OB
Semipro OB |
4800
4825
7525
7500
7510
|
|
18-8781
|
8781
|
Bearing
(Rear) |
Aero
Pro OB
Semipro OB |
4800
7500
7510
|
|
18-8782
|
8782
|
Ball
Bearing - High R.P.M. (rear) |
DF
Inboard |
4825
7525
|
|
19-6101
|
6557
|
Drive
Collet |
Aero
DF
Pro OB
Semipro OB |
4800
4825
7500
7510
|
|
20-4801
|
4811
|
Prop
Driver |
Aero |
4800
|
|
20-8701
|
9177
|
Prop
Drive |
DF |
4825
|
|
20-8722
|
8796
|
Flywheel |
Semipro
OB |
7510
|
|
20-8724
|
7521
|
Flywheel
(Red) |
Pro
OB |
7500
|
|
-
|
7515
|
Back
Plate Assembly w/ Ball Bearings |
Pro
OB |
7500
|
|
21-4801
|
4807
|
Back
Cover w/O-ring |
Aero |
4800
|
|
21-4821
|
7516
|
Back
Plate Only (PTO) |
Pro
OB
Semipro OB |
7500
7510
|
|
21-4835
|
4835
|
Back
Plate w/Drum Rotor |
DF |
4825
|
|
24-4090
|
7832
|
Prop
Stud Kit 1/4" - 28 Thread, Washer & Nut |
Aero |
4800
|
|
24-4091
|
7833
|
Prop
Washer, Stud (2 inch) & Nut |
DF |
|
|
-
|
7828
|
Prop
Stud |
DF |
4825
|
|
25-4801
|
-
|
Screw
set |
Aero
DF |
4800
4825
|
|
25-4803
|
-
|
Engine
screw set |
Semipro |
7510
|
|
25-4831
|
6853
|
Muffler
Screws |
Aero |
4800
|
|
25-8721
|
-
|
Lower
Outboard |
OB |
-
|
|
25-8731
|
-
|
Adapter
screws |
- |
-
|
|
25-8797
|
8797
|
Socket
Head Screw (Flywheel) |
Pro
OB
Semipro OB |
7500
7510
|
|
26-4801
|
4819
|
Wrist
Pin Clip - 2 ea. |
Aero
DF
Pro OB
Semipro OB |
4800
4825
7500
7510
|
|
27-4811
|
-
|
O-ring
set, water cooled head |
- |
-
|
|
27-4821
|
7517
|
Back
Plate O-ring - 2 ea. |
Aero |
4800
|
|
27-5880
|
-
|
Mixture
disk O-ring set |
-
|
-
|
|
27-8731
|
9203
|
O-ring
for Exhaust Adapter |
DF |
4825
|
|
27-8781
|
8745
|
Gasket
- Carburetor Seal (2ea) |
DF
Pro OB
Semipro OB |
4825
7500
7510
|
|
27-8782
|
8746
|
Carburetor
O-ring (2ea) |
Aero |
4800
|
|
28-8701
|
8692
|
Draw
Bar |
Aero
DF
Pro OB
Semipro OB
|
4800
4825
7500
7510
|
|
29-4811
|
4818
|
Head
Shim |
Aero |
4800
|
|
29-4812
|
7511
|
Head
Shim |
Pro
OB
Semipro OB
Inboard
DF |
7500
7510
7525
4825
|
|
29-8732
|
9066
|
Muffler
Gasket |
Pro
OB |
7500
|
|
30-4801
|
4830
|
Muffler |
Aero |
4800
|
|
30-4815
|
4815
|
Muffler
Rear Cap Aluminum |
Aero |
4800
|
|
-
|
6175
|
Muffler
baffle cap, stud kit |
-
|
-
|
|
-
|
9022
|
Exhaust
Extension Pipe |
DF |
4825
|
|
-
|
11048
|
Bisson
Pitts Muffler |
Aero |
4800
|
|
30-8701
|
9108
|
Pipe
Adapter - 0° |
DF |
4825
|
|
30-8704
|
8728
|
Exhaust
Adapter (w/o O-ring, uses 9023 O-ring) |
Semipro
OB |
7510
|
|
30-8721
|
9082
|
Muffler |
Pro
OB |
7500
|
|
30-8722
|
9009
|
Exhaust
Adapter |
Pro
OB |
7500
|
|
33-4801
|
4804
|
Piston
and Sleeve |
Aero |
4800
|
|
33-4802
|
7508
|
Piston
& Sleeve |
DF |
4825
|
|
33-4821
|
7508
|
Piston
& Sleeve Assembly |
Pro
OB
Semipro OB |
7500
7510
|
|
-
|
8679
|
Fitting
- Inlet |
Semipro
OB |
7510
|
|
50-8701
|
8764
|
Lower
End Assembly - Complete |
Semipro
OB |
7510
|
|
50-8702
|
8756
|
Lower
End Assembly - Complete |
Pro
OB |
7500
|
|
51-8701
|
8706
|
Lower
End Halves - Matched (Set Only) |
Semipro
OB |
7510
|
|
51-8702
|
8757
|
Lower
End Halves - Matched (Set Only) |
Pro
OB |
7500
|
|
53-8701
|
8708
|
Flex
Shaft |
Pro
OB
Semipro OB |
7500
7510
|
|
53-8768
|
8496
|
Water
Intake Tube Assembly |
Semipro
OB |
7510
|
|
54-8714
|
8714
|
Hinge
Pin - Stainless |
Pro
OB
Semipro OB |
7500
7510
|
|
54-8771
|
8771
|
Prop
Nut - #10-32 Thread (2 per bag) |
Pro
OB
Semipro OB |
7500
7510
|
|
54-8902
|
8367
|
Fitting
- Outlet |
Semipro
OB |
7510
|
|
56-4821
|
7518
|
Steering
Arm |
Pro
OB
Semipro OB |
7500
7510
|
|
56-8716
|
8716
|
Tubing
- Teflon - Flex Shaft Guide |
Pro
OB
Semipro OB |
7500
7510
|
|
57-8701
|
8751
|
Prop
Shaft Assembly |
Pro
OB
Semipro OB |
7500
7510
|
|
57-8721
|
8772
|
PTO
Shaft |
Pro
OB
Semipro OB |
7500
7510
|
|
57-8791
|
-
|
Prop
Drive Dog |
Pro
OB
Semipro OB |
7500
7510
|
|
58-8701
|
8711
|
Hinge
w/ Bushing |
Pro
OB
Semipro OB |
7500
7510
|
|
59-8765
|
8765
|
Maintenance
Kit - (Lower End Only) Screws (5), Flex Shaft, Teflon Tube &
Lube |
Pro
OB
Semipro OB |
7500
7510
|
|
80-5802
|
5874
|
K&B
Carburetor |
Aero |
4800
|
|
-
|
9469
|
Carburetor
Maintenance Kit |
DF
Pro OB |
4825
7500
|
|
80-8701
|
9445
|
Carburetor
Complete |
Semipro
OB |
7510
|
|
80-8702
|
9467
|
.453 Carburetor
Complete
|
Pro
OB
DF |
7500
4825
|
|
81-5801
|
5871
|
Carburetor
Body w/Carburetor Barrel |
Aero |
4800
|
|
81-6701
|
9468
|
Carburetor
Body |
DF
Pro OB |
4825
7500
|
|
81-8701
|
9446
|
Carburetor
Body |
Semipro
OB |
7510
|
|
82-6701
|
9243
|
Carburetor
Barrel |
DF
Pro OB |
4825
7500
|
|
82-8701
|
9263
|
Carburetor
Barrel |
Semipro
OB |
7510
|
|
83-6701
|
6833
|
Snap
Ring |
Pro
OB
Semipro OB |
7500
7510
|
|
-
|
8679
|
Fitting,
Pressure |
Aero |
4800
|
|
-
|
8679
|
Fuel
Fitting – Inlet |
Pro
OB
DF |
7500
4825
|
|
83-5622
|
5622
|
Carburetor
Control Arm |
-
|
-
|
|
85-6703
|
9234
|
Low
Speed Idle Disk w/ O-ring |
Aero |
4800
|
|
-
|
9448
|
Low
Speed Disk |
DF
Pro OB
Semipro OB |
4825
7500
7510
|
|
-
|
9252
|
Needle
Valve Bracket |
Aero |
4800
|
|
86-8721
|
7519
|
Throttle
Cable Bracket |
Pro
OB
Semipro OB |
7500
7510
|
|
87-5665
|
5665
|
Needle
Valve Kit |
Aero |
4800
|
|
-
|
5876
|
Carburetor
Maintenance Kit |
Aero |
4800
|
|
-
|
4839
|
Maintenance
Kit (all screws & O-ring) |
DF |
4825
|
|
99-8449
|
8449
|
Flex
Shaft Lube |
Pro
OB
Semipro OB |
|
|
-
|
9275
|
Mixture
Control needle Valve |
Pro
OB
Semipro OB |
7500
7510
|
|
-
|
9447
|
Carburetor
Maintenance Kit |
Semipro
OB |
7510
|
|
9255
|
9255
|
Remote
Needle Valve Assembly |
Aero
DF
Pro OB
Semipro OB |
4800
4825
7500
7510
|
