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  1. K

    Speed vs Tach Question

    Still working out the kinks in my 1991 Sylvan 20 foot pontoon boat with a 40 HP Mercury outboard. The owner?s manual for the motor says RPM should be between 5,000 and 5,500. At WOT my tach reads 4,300. GPS speed was 18 MPH with only me on board. Never had a tach or speedometer on a boat...
  2. K

    Maiden Voyage and Didn't Get Stranded

    Took out new (to me) 20 foot pontoon boat on her maiden voyage today. She?s old enough to buy liquor (1991 Sylvan) so I expected a few glitches. Fortunately, most of them appear to be minor. 1. Voltmeter reads 11 volts with ignition off ($25 fix.) 2. Live well pump ran but didn?t pump. ($30...
  3. K

    1991 Mercury 40 HP Questions

    Been reading the posts for a couple of weeks now while mechanic checked out new (to me) pontoon boat. New to Mercury outboards but ran Evinrude and Johnson motors for several years about 30 years ago. The outboard is a 1991 40 HP apparently model ELPTO, S/N D012547 with Quick Silver...
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