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2000 johnson 150

S

scot_f

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losing fire on number 1 cyl ch

losing fire on number 1 cyl changed plugs wires new coil pack will fire at first then goes away in a couple of seconds
 
"You should have the sensor &#

"You should have the sensor (trigger) tested, with a DVA tester under a variety of rpms.

Total loss of spark or intermittent loss of spark to a single cylinder is often indicative of a sensor going bad."
 
im still a lil new to troubles

im still a lil new to troubleshooting the electrical side of these obs.........especially one that new but i did want to say....................

welcome to marineengine!!
 
"he as an optical 'eye&#39

"he as an optical 'eye'....not sensors.....for ea cyl....does it do it at running speed...those are ultra sensitive to cranking speed for proper oper....also,ck to make sure u have 12v---nothing less than 11v...on yellow red wire that goes to pack...it supplements loss of cranking voltage,..on optical ign systems.."
 
"At cranking speed the voltage

"At cranking speed the voltage from the stator may not be enough to operate the circuits inside the power pack, therefore there is battery voltage supplied from the starter solenoid via the yellow/red striped wire. The extra voltage is needed in order for the optical sensor to operate correctly as low voltage from the battery and/or stator can cause intermittent or no fire at all."
 
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