HB Engines
HB Engines

Made in USA with
US and German componets since 1989

HB .20, .21 PDP & .25


Price & Availability

The HB .20 engine family is a renowned engine for durability and performance. The patented PDP ports boost the power without increasing fuel consumption. These 4 finger ports are located on the exhaust side of the baffle and introduce an additional fuel charge in a normally dead area of a loop scavenged engine design.
SPECIFICATIONS
HB .20
HB .21 PDP
HB .25
HP *
.44 @ 12,500 RPM
.68 @ 15,000 RPM
.69 @ 15,000 RPM
Practical RPM *
2000 ~ 18,000
2000 ~ 20,000
2000 ~ 20,000
Porting Arrangement
Loop Scavenged
Loop Scavenged with PDP ports
Loop Scavenged
Bore & Stroke
.633 x .633
.654 x .633
.708 x .633
Engine Weight
6.34 oz. ( 180 gr.)
7.5 oz. ( 213 gr.)
6.69 oz. ( 190 gr.)
Displacement
.20 cu. in. (3.4 ccm)
.21 cu. in. (3.5 ccm)
.25 cu. in. (4.08 ccm)
Piston/cylinder type
Lapped iron piston
Dykes ring piston / hardened steel liner
Prop Shaft Thread
1/4 x 28
Connecting Rod
Forged Aluminum bushed at both ends
Crankshaft
One piece hardened Steel
Muffler Weight
Bearings
Double Ball Bearing supported crankshaft
Carburetor
O-ring sealed main needle with air bleed idle adjustment, composite body.
Carburetor neck Dia
.390" Dia
Carburetor Throat
*Specification's subject to change depending on fuel, prop, exhaust system, etc.


© Model Engine Corporation of America, All rights reserved.
HB is a Registered Trademark of Model Engine Corp. of America
Reg US Patent Office

No part may be reproduced without written permission from
MECOA K&B Mfg -- 16015 Adelante St -- Irwindale, CA 91702 U.S.A.