1991 Johnson/Evinrude Models "EI" 40 thru 55 Service Repair Manual P/N 507947, Page 137Get this manual

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Markal Thermomelt Stik Procedure
test tank
it at 3000 RPM for at least minutes
f4l 3 Reduce engine speed and it at 900 RPM for minutes Mark the cylinder head with 1250 (520and 1630 (

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