The speed of a vehicle powered by a 4 horsepower (hp) engine depends on various factors, including the type of vehicle, its weight, and its design. For instance, a small motorcycle or go-kart with a 4 hp engine might reach speeds of around 30 to 40 mph, while a heavier vehicle, like a lawn mower, would go much slower. Generally, the performance will vary significantly based on the specific application and conditions.
my racing motor does 50
Johnson 4hp outboard bj4brcud
goes to kill switch
The proper spark plug for 4hp Briggs & Stratton is a J8 which I use in all my motors.
i believe it is .010 to .015. you can go to B&S site to find out for sure
about 60cc
25
1969
The 4WF69B model, 4hp Johnson, would be a 1969 year model.
0.020 in.
4hp
Jew