Does this sound like water in the fuel or something else?
Motor is pulsing periodically - every 20 seconds or so. It runs fine and strong, but there is slight drop of about 100 RPM's for 1-2 seconds then goes right back.
I have been out 3 times so far this year, the first 2 outings had no problem, but this last ride is when I noticed this. At the time I was down to about a 1/2 tank of fuel.
Started the season on a full tank (65 gals) that sat over the winter with Sta-Bil (like I always do with no prior issue). Prior to putting her in the water in early April, I also added in some E-Zorb. There is a water seperator filter between the tank & motor that was replaced when I preped her for the season.
Any ideas ?
Thanks John
1987 Mecury Blackmax 150
Motor is pulsing periodically - every 20 seconds or so. It runs fine and strong, but there is slight drop of about 100 RPM's for 1-2 seconds then goes right back.
I have been out 3 times so far this year, the first 2 outings had no problem, but this last ride is when I noticed this. At the time I was down to about a 1/2 tank of fuel.
Started the season on a full tank (65 gals) that sat over the winter with Sta-Bil (like I always do with no prior issue). Prior to putting her in the water in early April, I also added in some E-Zorb. There is a water seperator filter between the tank & motor that was replaced when I preped her for the season.
Any ideas ?
Thanks John
1987 Mecury Blackmax 150