Nice clean Fox 19 don't look like it's had much use very good compression
eBay
7.4V 12V Underwater Thruster Built-in Motor Engine for RC Fishing Bait Boat Waterproof Propulsor
Aliexpress UK
Cox Black silver .49 in very good condition
eBay
For RC Drone S99 Accessories Engines Motor Case Gears Spare Parts Kit Engines Gear UAV Motor UAV Engine Housing Motor
Aliexpress UK
It turns over to show the moving parts.
eBay
Alloy Engine Mount Engine Foundation for 26CC & QJ26CC Zenoah Engine of RC Model Boat Gas Gasoline
Aliexpress UK
Another rare engine. A very unusual rare engine. Doesn't appear to have been used much.
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CISON 15.7CC V2 Four Stroke Mini Gasoline Engine Version RC Internal Combustion Engine Motorcycle Engine Modified Model Toy
Aliexpress UK
MVVS tend to understate the power outputs of their engines. In a comparative test (Clarence Lee, RCM) the MVVS 61 spun a 14x6" prop over 2,000 rpm higher than an OS 61FX. The hot MVVS from Czechia!
eBay
For RC Drone S99 Accessories Engines Motor Case Gears Spare Parts Kit Engines Gear UAV Motor UAV Engine Housing Motor
Aliexpress UK
In excellent condition with good compression. Lovely little engine, these are my favourites.
eBay
1: 3/1: 4/1: 6.5 Gs Methanol Engine Gasoline Engine Starter For Fixed-wing Aircraft Engine Rc Drone Parts
Aliexpress UK
An unusual design as the crank casing splits from the front. Collectable Engine. Nice collectable and useable engine. One of the engine mounting holes is slightly elongated but other than that in great working condition.
eBay
For RC Drone S99 Accessories Engines Motor Case Gears Spare Parts Kit Engines Gear UAV Motor UAV Engine Housing Motor
Aliexpress UK
Two plane engines and propellers and tags for sale
eBay
RC Car Two-channel Sound Simulator 10 Sound Effect Speakers Linkage Engine Sound Group for 1/10 RC Crawler Axial SCX10 TRX4 D90
Aliexpress UK