K&B Manufacturing

7.5cc Engine Family
EARLY STYLE

All K&B 7.5cc (.45) and some parts fit 6.5cc (.40)

Always refer to these as 7.5's or 6.5's --- NOT .45 or .40

IB	DF	OB
9181	9101	8702	8703

Click here for prices, availability and on line ordering

Outboard #8701 First model. 8702 second model. 8703 third model.

Displacement .452 (7.41cc) Bore .870 Stroke .760
RPM 2,000 - 25,000 HP 2.2 @ 25,000 Weight 2.03 lbs.
Several carburetor styles used.

Click here for prices, availability and on line ordering

* DF - ducted fan / OB - outboard / IB - inboard

PARTS LISTED BELOW ARE FOR REFERENCE ONLY
Click here for prices, availability and on line ordering

New Part No.	Old Part No.	Description	Model	Model No.
-	8753	Power head less carburetor	OB	8702
-	7833	Prop Stud Assembly Kit	-	-
10-8701	9195	Crankcase	OB	8702 8703
10-8702	9088	Crankcase early model	OB	8701
10-8703	9184	Crankcase	IB	9181
10-8704	9109	Crankcase	DF	9101
11-8701	9178	One Piece Head	DF IB	9101 9181
11-8720	9161	Head Assembly, Fittings & Screws (use 11-8721 & 11-8722)	OB	8701 8702
11-8721	9160	Combustion Chamber	IB OB	9181 8701 8702
11-8722	8369	Cooling Jacket	OB IB	8701 8702 9181
11-8723	9191	air cooled head gold	OB	8703
15-8701	9086	Wrist pin w/pad early model	OB	8701 8702
15-8702	7514	Wrist Pin	OB DF	8703 9101
16-8701	9097	Connecting rod .218 Lower end diameter	OB IB	8701 9181
16-8702	9192	Connecting Rod (Tubular) .218 Lower end diameter	OB DF IB	8702 8703 9101 9181
16-8703	9193	Con Rod .234 pin dia.	OB IB	8702 8703 9181
17-8701	-	Crankshaft	Aero	-
17-8702	9163	Crankshaft; pin .218 dia.	DF IB	9101 9181
17-8703	9179	Crankshaft (.234 dia?)	IB	9181
17-8704	9196	Crankshaft use with 9192 Con Rod .218 crank pin dia	OB	8702 8703
17-8705	8730	Crankshaft early model carbibe weight has small pin .218�	OB	8701
17-8706	9188	Crankshaft use with 9193 Con Rod .234 crank pin dia	OB	-
18-8446	8446	Ball Bearing, PTO Top or Bottom	OB	8701 8702 8703
18-8778	8778	Ball Bearing - (Front)	OB DF IB	8701 8702 8703 9101 9181
18-8775	8775	Bearing, (rear)	DF IB	9101 9181
18-8780	8780	early model rear bearing .592 ID --- 15mm	OB	8701
18-8781	8781	Ball Bearing (Rear) .671 ID -17mm	OB	8702, 8703
19-6101	6557	Collet	OB DF IB	8702 8703 9101 9181
19-8702	9019	Collet early model (use 19-6101)	OB IB	8701 9181
20-8702	9177	Prop Drive	DF	9101
-	8717	Flywheel early model	OB	8701
20-8721	5121	Flywheel (Aluminum)	IB	9181
20-8722	8796	Flywheel (Lightened) uses 19-6101 collet	OB	8702
20-8723	9187	Flywheel gold uses 19-6101 collet	OB	8703
20-8729	9285	Starter Overdrive Pulley	IB	9181
21-8701	9090	Back Cover	Aero	-
21-8721	8709	Back plate Only (PTO)	OB	8701 8702
21-8722	8747	Back plate only (PTO)	OB	8703
21-8723	9168	Drum Rotor Back Plate Assembly .625 carburetor neck hole	DF IB	9101 9181
21-8749	8749	Back plate assembly w/ball bearings	OB	8703
21-8754	8754	Back Plate Assembly w/ Ball Bearings	OB	8701 8702
-	7758	Prop Washer	DF	9101
23-8921	8373	Washer	IB	9181
-	7759	Prop Nut	DF	9101
24-4090	7832	Prop stud, nut & washer	-	-
-	7761	Prop Stud (1/4 -28 thread)	IB	9181
-	7828	Prop Stud 2�	DF	9101
25-4803	-	Engine Screw Set	Semi-Pro	-
25-8701	-	Engine screw set Aero	Aero - DF	-
25-8702	-	Engine screw set Marine	IB	9181
25-8703	-	Engine screw set Marine	OB	8701 8702 8703
25-8721	-	Lower outboard unit screw set	OB	8701 8702 8703
25-8731	-	Adaptor screws	-	-
25-8732	-	Muffler screw set	-	-
25-8797	8797	Flywheel Socket Screw	OB	8702 8703
26-4801	4819	Wrist pin snaps	OB	8703
26-8701	-	Teflon pads	-	-
-	8669	O-ring for high speed needle (use 27-0183)	OB	8701
27-8731	9023	Exhaust Adapter, "0" Ring	DF IB	9101 9181
27-8781	8745	O-ring Carburetor Neck (2ea)	OB DF IB	8701 8702 8703 9101 9181
27-8782	8746	O-ring Carburetor Neck (2ea) � early disk valve type	IB	9181
28-8701	8692	Carburetor Draw Bar	OB DF IB	8701 8702 8703 9101 9181
28-8702	8693	Carburetor Draw Bar early 8701?	OB	8701
29-8701	8289	Gaskets, Engine (2) (use 29-4001)	OB DF IB	8701 8702 8703 9101 9181
29-8711	9147	Head Shim Kit, .003 & .010	DF OB IB	8701 8702 8703 9101 9181
29-8732	9066	Muffler gasket	OB	8703
30-8701	9108	Exhaust Adapter (w/o O-ring - uses 9023 O-ring)	DF	9101
30-8702	9000	Exhaust Adapter, 12 Degree (w/o O-ring - uses 9023 O-ring)	IB	9181
30-8703	9001	Exhaust Adapter, 20 Degree (w/o O-ring - uses 9023 O-ring)	IB	9181
30-8704	8728	Exhaust Adapter (w/o O-ring - uses 9023 O-ring)	OB	8701 8702
30-8709		Adaptor pipe
30-8721	9082	Muffler	OB	8703
30-8722	9009	Exhaust adapter	OB	8703
--	8750	front plate complete with shaft early model	OB	8701
31-8702	--	Front plate (old style 6.5, 7.5)	Aero
31-8705	9087	Front Plate	DF IB	9101 9181
31-8721	9197	front plate outboard (has oiling hole)	OB	--
31-8722	9126	front plate early model	OB	8701
31-8791	9198	Front Plate Assembly	OB	8702 8703
31-8792	9148	Front Plate Assembly	DF IB	9101 9181
33-8701	8734	piston/cylinder early model	OB IB	8701 8702 9181
33-8702	9128	Piston/Cylinder assembly pipe timing	OB IB DF	8703 9101 9181
33-8703	9167	Piston/Sleeve	OB	8702
37-8701		Drum Valve	DF I B	9101 9181
--	8710	twin steering arm early model (use 8721)	OB	8701
--	8727	prop	OB	8701
50-8701	8764	Lower Unit Assembly Complete exhaust thru includes flex shaft, teflon tube, prop shaft.	OB	8701 8702
50-8702	8756	Lower end assembly complete � uses muffler (Includes flex shaft, Teflon tube, prop shaft)	OB	8703
51-8701	8706	Lower Unit Halves, Matched exhaust thru lower unit	OB	8701 8702
51-8702	8757	Lower end halves only	OB	8703
53-8701	8708	Flex Shaft	OB	8701 8702 8703
53-8768	8768	Water Pickup Tube	OB	8701 8702
53-8770	8770	Early exhaust baffles	OB	8701
54-8701	5156	Square Drive (.187 sq)	IB	9181
54-8714	8714	Hinge Pin (Stainless)	OB	8701 8702 8703
54-8771	8771	Prop Nut - 2 per bag	OB	8701 8702 8703
54-8791	5191	Cable Collet Assembly w/ 3/16 collet	IB	9181
54-8792	5170	Cable Collet 3/16 ID	IB	9181
54-8901	8368	Water Fittings, Bent w/nut	OB	8701 8702
54-8902	8367	Water Fittings (10-32)	IB	9181
-	8645	Steering clamp	OB	8701
56-8716	8716	Teflon Flex Shaft Tube	OB	8701 8702 8703
56-8721	8721	Steering Arm	OB	8702 8703
56-8731	8731	prop shock	OB	8701
57-8701	8751	Prop Shaft Assembly	OB	8701 8702 8703
57-8721	8772	PTO Shaft	OB	8701 8702 8703
58-8701	8711	Hinge w/ Bushing	OB	8701 8702 8703
58-8752	8752	Hinge with bushing early model	OB	8701
59-8765	8765	Lower Unit Maintenance Kit	OB	8701 8702 8703
-	5176	Carburetor complete 5/92 on carburetor needle	IB	9181
-	8760	early style square carburetor	OB	8701
80-8701	9445	K&B Carburetor early DF, IB	OB DF IB	8702 8703 9101 9181
80-6701	9467	Carburetor(Optional) .453 Bore	OB IB	8702 8703 9181
80-8721	9260	K&B Carburetor late	OB	8702
-	8766	Carburetor body, early square carb	OB	8701
81-8701	9446	Carburetor Body early	OB DF IB	8702 8703 9101 9181
81-8721	9261	Carburetor Body late	OB	8702
-	8738	carburetor barrel early model	OB	8701
82-8701	9263	Carburetor Barrel	OB DF IB	8702 8703 9101 9181
-	5220	Carburetor barrel spring early model (use 83-0102)	OB	8701
-	6834	Carburetor Snap Ring	OB DF IB	8702 8703 9101 9181
-	8744	early carburetor barrel spring	OB	8701
83-5622	5622	Carburetor control arm	-	-
83-8701	8743	throttle arm	OB	8701
-	7739	needle valve collet and lock nut	OB	8701
-	8679	Carburetor Fuel Fitting	OB DF IB	8701 8702 8703 9101 7525
-	8742	idle needle receptacle early model	OB	8701
-	8767	early carburetor idle stop screw	OB	8701
-	7737	Needle valve stem early model	OB	8701
85-0102	8741	idle needle w/O-ring	OB	8701
85-6703	9234	Carburetor Low Speed Disk early	OB DF IB	8702 8703 9101 9181
85-8702	9235	Low Speed Disk late (for remote needle)	OB DF IB	8702 8703 9101 9181
86-8721	7519	throttle cable bracket	OB	-
87-2918	2918	Needle valve assembly on carburetor	IB	9181
87-5665	5665	Needle Valve Assembly (early style w/ needle on carburetor)	-	-
-	9256	Carburetor Maintenance Kit late	OB	8702
-	9447	Carburetor Maintenance Kit early	OB DF IB	8702 8703 9101 9181
-	9165	Engine Maintenance Kit (use 29-8701 and 25-87xx)	OB	8702 8703
--	9255	Remote Needle Valve	OB DF IB	8702 8703 9101 9181
-	9275	Mixture Control Needle Valve	OB DF IB	8702 8703 9101 9181
99-8449	8449	Flex Shaft Lube	OB	8701 8702 8703
99-9144	9144	Engine Maintenance Kit	OB DF IB	8701 9101 9181

K&B Homepage

MECOA Homepage

Aero Engines • Auto Engine • Marine Engines
Accessories • Prices & Availability • Parts Lists & Owner's Guide • Repair information
FAQ (engine operations) • Warranty • How to Order • How to Contact Us

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

©2004-1998 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

©2004-1998 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