Spark Plug Gap for High Performance 2-Stroke Outboards
A spark plug gap that is too small can cause the spark to not ignite the air-fuel mixture. However, a gap that is too large can cause the...
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Mike Hill
Sep 8, 20232 min read
Timing a 2-Stroke Outboard, Finding TDC
Ignition timing for a 2-stroke engine is determined by the height of the piston before top dead center (TDC). The ignition timing is...
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Mike Hill
Sep 7, 20231 min read
Bad Reeds, Bad Day!
Reeds are used in two-stroke outboards to control the fuel-air mixture. A bad reed can denigrate your boat's high performance, or worse,...
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Mike Hill
Sep 7, 20231 min read
Mercury V6 2-stroke Block Identification Chart
A guide to Mercury Marine and Mercury Racing 2.5 blocks and a few 2.0 and 2.4 Liters, too. The "double letters" are stamped on the...
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Mike Hill
Sep 7, 20231 min read
Propeller Pitch & Lower Unit Gear Ratios
The lower unit gear ratio of an outboard engine is a reduction gear that controls how power is applied to the water. The gear ratio is...
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Mike Hill
Sep 7, 20231 min read
Cockpits, Capsules, and Crash Boxes
Cockpits, capsules, crash boxes, and safety cells are so important to the future of all forms of racing from Indy Cars to Formula 1 and...
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Mike Hill
Sep 7, 20231 min read
8 Design Features of High-Performance Boat Props
A high-performance boat propeller works by converting torque into thrust. Propeller blades are designed to displace water, to create the...
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Mike Hill
Sep 5, 20231 min read
Bench Test Outboard Ignition with a Multimeter
How to test earlier Mercury Marine 2-stroke outboards with ADI/CDI ignition stator, trigger, switch-boxes, coils, and rectifiers using a...
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Mike Hill
Sep 5, 20231 min read
7 Factors to find an Optimal 2-Stroke Fuel/Oil Ratio
What's your optimal 2-stroke fuel/oil pre-mix ratio? There are 7 factors for you to consider when determining your optimal 2-stroke...
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Mike Hill
Sep 5, 20231 min read
Is AVGAS an alternative to Race Fuel?
I've been getting some questions on what octane I should run in the Mercury V6 2-stroke outboard (2.0, 2.4, 2.5 liters) based on...
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