1990 Johnson Evinrude "ES" Colt/Junior thru 8 Service Repair Manual, P/N 507870, Page 19Get this manual
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Engine Specifications 4BRH Operation Full Throttle Operating Range Power Power Rated Idle RPM in Gear Test Propeller Minimum Test RPM Weight: 4500 to 5500 RPM 4HP(3kw) 5000 RPM 625 25 RPM OMC PI 31773