Proper flushing is essential for maintaining high-performance race outboards, especially engines equipped with low-water pickup gearcases used in tunnel boat and Formula racing.
 
Buckshot Racing #77 has developed a Custom Race Outboard Flusher engineered specifically for Mercury Racing competition engines and Super Speedmaster gearcases used in professional racing environments, including the Mercury Racing F1, S3000, SST-120, SST-140, SST-200, APX 200, APX 260, and APEX 360 engines with Super Speedmaster gearcases.
 
Unlike traditional outboard flushers designed for fishing motors, this unit is built to work with race gearcases that rely on nose-cone water pickups, allowing proper cooling water circulation during maintenance, inspection, or post-race flushing.
 
Built for Mercury Super Speedmaster Gearcases
This flusher is designed specifically for Mercury Racing Super Speedmaster gearcases, including the SSM #4 and SSM #6 models used on many Formula and tunnel boat racing engines.
 
Within the racing community, these gearcases are commonly referred to as “Mark 4,” “Mark 6,” “SSM #4,” or “SSM #6,” all describing the same family of high-speed racing gearcases used on Mercury competition outboards. These units are frequently paired with surface-piercing propellers and extremely small water pickups, making conventional flushers ineffective.
 
The Buckshot Racing #77 race flusher delivers water directly to the pickup area so the water pump and cooling system can operate properly while the engine is on the trailer or test stand.
 
Designed for Formula and Tunnel Boat Racing
The flusher supports a wide range of Mercury Racing Formula outboards used across international and national racing circuits. This includes engines used in F1H2O, IHRA F1, USF1, AUS F1, APBA F200, and F150 competition classes.
 
It is compatible with many well-known Mercury Racing powerheads including F1, S300, SST-120, SST-140, and SST-200 engines, all of which commonly run Super Speedmaster gearcases in competition.
 
These engines depend on high-speed water pickups located on the gearcase bullet or nose cone, and the Buckshot Racing #77 flusher ensures those pickups receive an adequate water supply during flushing and idle operation.
 
Compatible with Modern Mercury Racing APX Engines
In addition to classic Formula engines, the flusher is also suitable for newer Mercury Racing APX competition outboards, including the APX 200, APX 260, and APEX 360 race engines used in modern Formula tunnel boat racing.
 
These engines continue Mercury Racing’s tradition of high-output two-stroke performance and utilize specialized gearcases that require targeted water delivery when flushing.
 
High-Volume Water Flow for Effective Flushing
Race outboards typically operate in harsh environments where sand, debris, and saltwater can enter the cooling system. Flushing after each run helps remove contaminants from the cooling passages, cylinder block, and water pump housing, reducing the risk of overheating, corrosion, or impeller damage.
 
The Buckshot Racing #77 flusher is designed to provide strong, direct water flow to the pickup area, allowing the cooling system to circulate water properly while the engine runs at idle.
For safe operation, engines should always be run at idle speed only during flushing to prevent damage to the water pump impeller.
 
Durable Construction for Race Environments
This race flusher is constructed from durable, flexible materials designed to withstand repeated use in marine environments. The flexible body conforms to the shape of Super Speedmaster gearcases and nose cone pickups, helping maintain a reliable seal during operation.
 
Its design allows racers and mechanics to flush engines quickly between runs, during maintenance, or while diagnosing cooling system performance.
 
Built for Racers by Buckshot Racing #77
Buckshot Racing #77 develops parts and tools specifically for high-performance Mercury outboards and racing engines. This Custom Race Outboard Flusher for SSM #4 and SSM #6 gearcases provides racers with a practical way to maintain their engines between testing sessions, race heats, and rebuilds.
 
For teams running Mercury Racing F1, S3000, SST-120, SST-140, SST-200, APX 200, APX 260, and APEX 360 engines with Super Speedmaster gearcases, this flusher provides an effective solution for safe cooling system flushing and maintenance.
 
Contact mike@buckshotracing77.com or +1-714-697-1716 with any questions.