Very Gummy: Sportwerks .26 Mach 26 Nitro Engine

DYNAMITE MACH 26 NITRO ENGINE from HPI SAVAGE X BIG BLOCK 1/8 MONSTER TRUCK

FC 3.5 Nitro RC Engine with OFNA 26 Head for parts/repair with other misc.

HPI Racing Nitro Star F4.6 Engine - Low Compression/Gummy? As Is

OS Engines 26 Mach .26 C Nitro Engine

Vintage HPI Racing Savage Nitro Star Big Block F4.1? F4.6? Nitro Engine Used

Rare Vintage HPI Racing .25 3.5 Nitro Engine w/ Ugpraded GO Cooling Head

No Compression? HPI Racing .21 21 3.5 Nitro Engine Used