Protek Exhaust Primer # 60/90 for 4 cycle engines.
They require speeds from 2200 to 3000 RPM to function properly. They are available with 1", 1-14", 1-1/2" and 2" cast iron adapters to fit standard exhaust pipes.
Protek Exhaust Primers Selection Chart
Primer Model
Engine Displacement (Cubic Inches)
50
100
150
200
250
300
400
500
600
Engine RPM
60/90
2500
2000
1800
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Protek Exhaust Primer 60/90 with 1" NPT Adapter EP60/90-1" (D)