.48 & 7.5 R/C ENGINE
PARTS LIST

 
Aero
Pro Outboard
Semi-Pro Outboard
Ducted Fan
Inboard
PN 4800
PN 7500
PN 7510
PN 4825
PN 7525

DF - ducted fan / OB - outboard

AERO HISTORY

The MUFFLER CAP is aluminum, the nylon one was discontinued in 1999.

Only the first 100 engine had aluminum back covers,
everything else has Nylon since 1998

Note: Nylon is actually better if the connecting rod rubs against it it won't ingest Aluminum Oxide through the engine which reduced glow plug life.

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

7500
7510

-
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
 

©2008-1998 Model Engine Corporation of America, All rights reserved.
K&B and the oval logo are Registered Trademarks of Model Engine Corp. of America
Registered U.S. Patent Office

No part may be reproduced without written permission from
MECOA/K&B -- P.O. Box 98 -- Sierra Madre, CA 91025 U.S.A.