2-12-2020

Outboard

Inboard

Ducted Fan

8907

8935
8950

  8916

8910

Changes were made to the crankshaft.
Early 12mm, later 13mm.

Very early 3.5's sleeves had a smaller O.D. Crankcase I.D. and sleeve OD must be checked.
Early size is .750 -- Late/current size .765

Early inboards and outboards were equipped with an exhaust throttle and venturi, no carburetor. Rather difficult to adjust and set up. We suggest converting to a carburetor.

Early, early outboards, 8906 ... Lower leg has short skeg and a clamped in prop shaft housing assembly.
New style left had threaded prop shaft housing will not fit. You must replace the entire lower unit.
Some of the first PTO plates only had one ball bearing, usually if the square drive side is worn you will leak crankcase pressure and engine will run poorly. First PTO has a lock ring pressed on the square drive side which was eliminated in the late 1980's.

Head squish band clearance .018 (18 thousands)

 

* DF - Ducted Fan / OB - Outboard / IB - Inboard

The list below is just for quick reference. To see price and availability click this link
Click here for prices, availability and on line ordering

New
Part No.
Old
Part No.
Description
Model
Model No.
10-8901
8507
Crankcase
OB
8935 8907 8906 8950
10-8902
8524
Crankcase
DF
8910
10-8903
8528
Crankcase
IB
8916
-
8395
Water cooling jacket 92
IB
8916
-
8403
Head button use 8502
IB
OB
8916
8709
-
8409
Head Assembly
IB
8912
-
8911
Engine Maintenance Kit
DF
IB
8910
8916
11-8901
-
Head
AERO
-
11-8902
8404
Head
DF
8910
11-8921
8502
Head button Combustion Chamber
OB
IB
8907
8916
11-8922
8408
Water Cooling Jacket Assembly
OB
IB
8907 8906
8916
11-8923
8939
Head, Air Cooled (Gold)
OB
8935
15-8901
8438
Wrist Pin w/ Teflon Pads
OB
DF
IB
8935 8907 8906
8910
8912 8916
16-8901
8344
Connecting Rod
DF
IB
OB
8910
8916
8907 8935
16-8902
8390
Early Connecting Rod 93
OB
DF
IB
8907 8906
8910
8916
17-8901
-
Crankshaft
AERO
-
17-8902
8393
Crankshaft 12mm
OB
8906
17-8903
8527
Crankshaft
DF
IB
8910
8916
17-8904
8338
Crankshaft, 13mm
OB
8935, 8907
17-8905
8464
Crankshaft 12mm
IB
8912
18-8446
8446
Ball Bearing, PTO
OB
8935 8907 8906
18-8775
8775
Ball Bearing, Rear 12mm
OB
IB
8906
8912
18-8776
8776
Ball Bearing, Front
OB
DF
IB
8935 8907
8 910
8912 8916
18-8778
8778
Ball Bearing, Rear
DF
IB
8910
8916
18-8789
8789
Ball Bearing, Rear 13mm
OB
8935 8907
19-8901
6527
Collet
DF
IB
OB
8910
8916
8935 8907 8906
-
8422
Flywheel 93
IB
8912 8916
-
8476
Flywheel complete
IB
8912
20-8901
-
Prop Drive
AERO
-
20-8902
6521
Prop Drive (use 20-8901)
DF
8910
20-8921
8437
Flywheel, Aluminum
OB
8907 8906
20-8922
8933
Flywheel, Aluminum
IB
8916
20-8923
8938
Flywheel (Gold)
OB
8935
21-8901
8400
Back cover
IB
8912
21-8921
8350
Backplate PTO
OB
8935 8907 8906
21-8922
8552
Backplate Assembly w/Drum Rotor
DF
IB
8910
8916
21-8923
8340
Backplate Assembly PTO
OB
8935 8907 8906
23-8921
8373
Washer
IB
8916
24-8921
8427
Flywheel Nut
OB
8935 8907 8906
25-4081
-
Screw set, carb
Aero
-
25-8901
-
Screw Set, engine
AERO
ALL
25-8902
-
Screw Set, engine
IB
ALL
25-8903
-
Screw Set, engine
OB
ALL
25-8921
-
Screw Set, lower unit
OB
ALL
25-8931
-
Screw Set, muffler
AERO
ALL
25-8932
-
Screw Set, adapter
MARINE
ALL
25-8982
-
Screw Set, carb
MARINE
-
26-8901
-
Teflon pad
-
-
26-8902
-
Snap Ring
-
-
27-8931
-
O-ring for Exhaust Adapter  
-
27-8981
9050
Carburetor neck O-ring (1pc)
OB
DF
IB
8935 8907 8906
8910
8912 8916
28-5601
5658
Carburetor Draw Bar
DF
IB
8910
-
8477
Maintenance Kit
IB
8912
29-8901
5659
Gasket, Engine (2 each)
OB
DF
IB
8935 8907
8910
8916
29-8901
8822
Gaskets
IB
8912
29-8911
8519
Head Shim Kit (.005 & .010) 1 ea.
OB
DF
IB
8935 8907
8910
8916
-
8475
Muffler Adapter - Complete w/butterfly
IB
8912
-
9051
Exhaust control arm w/screws
IB
8912
30-8901
8398
Exhaust Adapter
DF
8910
30-8902
8923
Exhaust Adapter, 12 Degrees
IB
8916
30-8903
8924
Exhaust Adapter, 20 Degrees
IB
8916
30-8904
8397
Exhaust Adapter
OB
8907 8906
30-8907
8932
Exhaust Coupler tube
IB
-
30-8921
8415
Tuned Muffler
OB
8935
30-8922
8467
Muffler Exhaust Adapter
OB
8935
30-8923
8468
Muffler Assembly - Vertical Stacks
IB
8912
-
8342
Front plate Assembly
DF
IB
8910
8916
-
8343
Front plate Assembly
OB
8935 8907
-
8388
Front Housing 12mm crank
OB
8906
-
8389
Front Housing
IB
8912
-
8687
Front housing assemble
OB
8906
-
8914
Front plate complete
IB
8912
31-8901
-
Front Plate
AERO
-
31-8902
8554
Front Plate
DF
IB
8910
8916
31-8921
8336
Front Plate
OB
8935 8907
33-8901
8836
Piston & Sleeve (Std timing - requires Teflon pads on wrist pin)
OB
DF
IB
8935 8907 8906
8910
8912 8916
33-8902
-
Piston & Sleeve, Gold head SS (pipe timing - requires Teflon pads on wrist pin)
OB
DF
IB
8935 8907 8906
8910
8912 8916
33-8903
-
Piston & Sleeve, Gold Head SS (pipe timing - requires snap rings on wrist pin)

OB
DF
IB

8935 8907 8906
8910
8912 8916
37-8901
-
Drum Intake Valve
-
-
-
8431
Prop 1 3/8 x 1 3/4 93
OB
8907 8906
-
8463
Prop 1 3/8 x 2 93
OB
8907 8906
-
8484
Lower Unit Maintenance Kit
OB
8935 8907 8906
-
8931
Prop 93
OB
8907
50-8901
8686
Lower Unit Assembly
OB
8907 8906
50-8902
8937
Lower Unit Assembly
OB
8935
50-8903
-Lower Unit Assembly
OB
8950
51-8901
8540
Lower Unit Halves, Matched
OB
8907 8906
51-8902
8936
Lower Halves (Matched)
OB
8935
51-8903
-Lower Unit Assembly
OB
8950
53-8901
8428
Flex Shaft 5/32 dia
OB
8935 8907 8906
53-8902
8496
Water Intake Tube
OB
8907 8906
-
8479
Collet, U joint nut & washer
IB
8912
54-8771
8771
Prop Nuts (2 each)
OB
8935 8907 8906
-
5158
Square Drive (.130 sq. for .150 cable)
IB
8916
54-8901
8368
Water Fitting, Bent w/ Nut (Inlet)
OB
8935 8907 8906
54-8902
8367
Water Fitting Straight (10-32 Thread)
IB
OB
8912 8916
8907 8906
54-8914
8426
Hinge Pin
OB
8935 8907 8906
54-8991
5270
Cable Collet Assembly 5/32
IB
8916
54-8992
5157
Cable Collet 5/32
IB
8916
-
5215
Twin steering arm w/2 screws
OB
8906
-
8396
Hinge 93
use 8934
OB
8907 8906
56-8916
8430
Teflon Flex Shaft housing
OB
8935 8907 8906
56-8921
8921
Steering Arm
OB
8935 8907
56-8934
8934
Hinge (nylon)
OB
8935 8907
57-8901
8685
Prop Shaft Assembly
OB
8935 8907 8906
57-8921
8341
Shaft. PTO
OB
8935 8907 8906
-
8680
Multi Speed Carburetor 93
OB
DF
IB
8907 8906
8910
8916
80-8901
9215
K&B Carburetor (Gold) Has idle screw to hold barrel (Neck dia .437)
OB
-
80-8902
9220
K&B Carburetor (Gold) 94 (.312 inlet) Darker Gold, No Idle adjustment screw, uses snap ring to hold barrel (Neck dia .437)
OB
DF
IB
8935 8907
8910
8916
80-8903
9696
K&B Carburetor (Red) (.345 inlet) (Neck dia .437) Purple has been sold
OB
DF
IB
8935 8907
8910
8916
80-8904
-
K&B Carburetor (Black) (.265 inlet) (Neck dia .437)
-
-
-
8681
Carburetor Body and spray bar 93
OB
DF
IB
8907 8906
8910
8916
-
9058
Venturi
IB
8912
-
9219
Carburetor body & Spray Bar
OB
IB
DF
8935 8907
8910
8916
81-8951
8097
Venturi 95
IB
8916
-
8677
Carburetor Barrel 93
OB
DF
IB
8907, 8906
8910
8916
-
9218
Carburetor Barrel
DF
OB
IB
8935, 8907
8916
8910
-
6840
Snap Ring (Carburetor barrel)
DF
IB
OB
8910
8935
8907
-
7778
Needle Valve Clip
IB
8912
-
8684
Carburetor Control Arm Kit
OB
DF
IB
8935 8907 8906
8910
8916
83-5622
5622
Carburetor Control Arm   
87-2918
2918
Needle Valve Assembly
IB
8912, 8916
99-8449
8449
Flex Shaft Lube
OB
8935 8907 8906
-
7739
Needle Valve Collet & Locknut
OB
IB
DF
8935 8907 8906
8910
8916
-
7745
Water Fitting, Bent w/Nut
OB
8907
-
7776
Needle Valve body, nut & clip
IB
8912
-
8679
Carburetor Fuel Fitting
OB
IB
8935 8907 8906
8916
-
7737
Needle Valve Stem
OB
DF
IB
8935 8907 8906
8910
8916
-
7777
Needle Valve Knob
IB
8912
-
8482
Engine Maintenance Kit
OB
8935 8907 8906
 
 

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MECOA/K&B -- P.O. Box 5 -- Sierra Madre, CA 91025 U.S.A.