HB .40, .40 PDP & .50

Price & Availability

The HB .40 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.
HB .40
HB .40 PDP
HB .50
HP *
@ 16,000 RPM
@ 16,000 RPM
Practical RPM *
1800 ~ 16,000
1800 ~ 19,000
1800 ~ 16,000
Porting Arrangement
Loop Scavenged
Loop Scavenged with PDP ports
Loop Scavenged
Bore & Stroke
Prop Shaft Thread
1/4 x 28
Piston/cylinder type
Dykes ring piston / hardened steel liner
Connecting Rod
Forged Aluminum bushed at both ends
One piece hardened Steel
.40 cu. in. (6.5 ccm)
Engine Weight
oz. ( gr.)
Muffler Weight
Double Ball Bearing supported crankshaft
O-ring sealed twin needle with full fuel metering, composite body.
Carburetor neck Dia
.510" Dia
Carburetor Throat
*Specification's subject to change depending on fuel, prop, exhaust system, etc.

©2004-1998 Model Engine Corporation of America, All rights reserved.
HB is a Trademark of Model Engine Corp. of America

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