"I own a 2004 Stingray 240CS 3
"I own a 2004 Stingray 240CS 305mpfi 260 hp. Late last season I noticed some performance losses (50+ mph @ 5000 rpm to about 45 mph @ 4500rpm). I then developed an engine miss right at 4400 rpm and continues to miss at WOT. Being late in the season I winterized the boat, as with every year using Stabil in the fuel system.
This season along with normal servicing I have replaced the dist cap and rotor because of corrosion, the spark plugs (they looked perfect), compression check all cycl were mid to high 170's, and fuel additives out the "ying yang.
Upon the request of our local Mercrusier dealer I replaced the water seperator(again) and dumped a bottle of "ValveTech" fuel restorer in the fues system. I ran the boat 2 weeks ago and at first it came up on step fine and ran up to 4700 rpm for about 2 or 3 minutes and all of a sudden the miss came back. All the local Marina's have stated fuel problems have pleged everyone this year. I am a hobbyist and have work on Mercrusiers for many, many years. Any advice before I take it to the local dealer.
Thanks"
"I own a 2004 Stingray 240CS 305mpfi 260 hp. Late last season I noticed some performance losses (50+ mph @ 5000 rpm to about 45 mph @ 4500rpm). I then developed an engine miss right at 4400 rpm and continues to miss at WOT. Being late in the season I winterized the boat, as with every year using Stabil in the fuel system.
This season along with normal servicing I have replaced the dist cap and rotor because of corrosion, the spark plugs (they looked perfect), compression check all cycl were mid to high 170's, and fuel additives out the "ying yang.
Upon the request of our local Mercrusier dealer I replaced the water seperator(again) and dumped a bottle of "ValveTech" fuel restorer in the fues system. I ran the boat 2 weeks ago and at first it came up on step fine and ran up to 4700 rpm for about 2 or 3 minutes and all of a sudden the miss came back. All the local Marina's have stated fuel problems have pleged everyone this year. I am a hobbyist and have work on Mercrusiers for many, many years. Any advice before I take it to the local dealer.
Thanks"