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Still looking for help 1996 9.9hp Evinrude

L

LARRY53

New member
When first started for the day my 96 9.9 hp Evinrude has reduced RPMs and power at full throttle for a few minutes. It will then suddenly rev up to normal speed and power. After a few cycles of this, it will then do fine and respond normally to increased throttle. It starts beautifully and idles fine except it will slightly accelerate while at idle for just a second then idle back. I have rebuilt the carb and changed plugs with no effect. Once it has been running for a while, it operates fine. It has fresh fuel and pumping the bulb has no effect. The power pack was replaced less than 5 hrs run time ago (wouldn't start) Any ideas?:confused:
 
Re: Still looking for help 9.9 Evinrude

When it is acting up, you need to check spark and make sure you have a bright blue spark and it jumps a 7/16 gap.
 
Re: Still looking for help 9.9 Evinrude

so your mean run it and if it is not running up to speed, then pull the plugs and check for spark? Are you thinking it is the ignition coil? Would that change to mormal after it runs for a while?
 
Re: Still looking for help 9.9 Evinrude

Coils can react funny sometimes.
It takes fuel, compression and spark to make your engine run, one of them is intermittent, it's up to you to find it.
 
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