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Quick answer
The MUSA FV1A is a 7cc, four-stroke, vertical OHV model engine with air-cooling fins and a separate lubrication system. This listing is for the Engine Only configuration. Photographs of supplier base variants were intentionally excluded because those versions are not currently offered on this page.
What distinguishes FV1A?
The exposed green engine housing, long-stroke geometry and pushrod-operated valves distinguish FV1A from the smaller silver F1. The supplier describes an oil-pump and wet-sump design rather than the F1's splash-lubrication specification. Although the supplier discusses possible model-boat or water-plane use, this listing does not certify vehicle integration. Evaluate cooling airflow, mounting, load, propeller coupling and control independently.
Supplier-listed specifications
| Model / displacement | MUSA FV1A KW-OHV / 7cc |
|---|---|
| Valve train | Pushrod OHV, four-stroke single-cylinder |
| Bore × stroke | 20 × 22.5 mm |
| Cooling / lubrication | Air-cooled fins / independent oil system |
| Ignition | External mechanical ignition-breaker assembly |
| Supplier-listed size / weight | 10 × 7 × 13.3 cm / about 1.1 kg |
Supplier figures describe the named model; actual loaded performance is not independently verified.
What comes in the engine-only package?
The supplier lists one assembled engine, spare parts and instructions for the base package. It specifically says a spark plug, ignition/start accessories and fixed base are not included. Obtain the correctly specified plug and ignition parts before attempting to run it. Accessories shown in other supplier photos do not form part of this offer.
First-run and safety considerations
Use the delivered manual to verify oil-sump fill, ignition voltage, plug fit, fuel and starting procedure. The supplier lists a 1/4-32 ME8-type plug and 6-12 V starting supply, but component compatibility must be confirmed for the actual delivery. Mount securely and provide airflow to the fins. Avoid trial-and-error ignition wiring, indoor exhaust exposure and unsupervised running.
Which nearby single-cylinder model should you choose?
Choose FV1A for a larger OHV single with an independent lubrication system. The MUSA F1 is a smaller 2.7cc vertical model with a different included-parts list; the GS-DK01 is an 8cc hand-pull alternative. Compare required accessories before comparing price alone.
Frequently asked questions
Which FV1A version is sold here?
Engine Only. Supplier photos showing silver or black fixed bases are not depictions of this selected offer.
Is a spark plug included?
The supplier explicitly says the FV1A base package excludes the plug; source the specified part separately.
Is it water-cooled?
No. The supplier describes finned air cooling, even though it discusses optional external equipment.
Will it fit my RC boat?
No fit, output under load or propeller pairing is guaranteed. Confirm integration with the model manufacturer and use a protected test setup.
Before ordering
Check the exact model code, the missing ignition parts and current supplier availability. This engine should not be purchased as a complete ready-to-run base display unless the extra equipment is sourced separately.
Manufacturer-specific facts: EngineDIY FV1A listing. Reviewed 23 September 2026.