Visit The Outboard Wizard’s website for genuine BRP OMC Evinrude parts at 10-50% off list prices.
freshgreg

Hi, my 175 2000 model johnson runs well and until a few months ago the tacho worked fine.  Now it reads around 1000 rpm at idle and 3000 at full revs.  There is no inbetween or no high rev reading.  The batteries charge fine so I don't think the charger is busted.  Any thoughts?

Quote 0 0
outboardwizard

Hello sounds like bad rectifier regulator.try checking gray lead at rectifier with key on not running and if any voltage present replace regulator rectifier. running voltage should be around 9 volts.

Ralph, The Outboard Wizard
Owner, Lindenhurst Outboard Service Inc. since 1979 +
Websites: "Outboard-Wizard" a few domains since 2001 - 
Ebay Store: Outboard Wizard  The Outboard Wizard - Power Seller
You Tube: See me here!
Quote 0 0
freshgreg

thanks will try it

 

Quote 0 0
freshgreg

will a bad rectifier adversley affect the battery?

Quote 0 0
outboardwizard

Hello the rectifier can cause undercharging and overcharging problems.

Ralph, The Outboard Wizard
Owner, Lindenhurst Outboard Service Inc. since 1979 +
Websites: "Outboard-Wizard" a few domains since 2001 - 
Ebay Store: Outboard Wizard  The Outboard Wizard - Power Seller
You Tube: See me here!
Quote 0 0