daveznspace
Seaman Apprentice
- Joined
- Oct 13, 2010
- Messages
- 31
I have a 2007 9.8HP TOHATSU MODEL# MFS9.8A3EFS that's not getting full power when in gear.
I use it frequently (usually at least once a week), however this issue started after I hadn't run it for 2 weeks which of course is a short amount of time. At the time I did'nt know you are supposed to run fuel out after every use so there was fuel in there and during that time there were some big storms and this boat is on a dock uncovered. I do always add sta-bil to the fuel.
Basically when you start moving and go to hit full throttle it just barely gets going, I can get it up to about 20mph usually but right now maybe it gets 4-5mph.
The carb was rebuilt a yr ago.. it didn't need it except the previous owner tried to clean it and couldnt get it back together so I took it in and had it done.
Here's what I have done so far:
Checked compression: both sides around 130 (128 & 130)
New plugs
New fuel tank
new fuel lines (tank to motor)
cleaned out fuel filter
Did a Seafoam cleaning (3/4 gallon gas to one 16 oz bottle of seafoam.. run for 15 min, sit 15, run 15 sit 15)
I tried to adjust throttle bar but that hasn't gone well either. If I set it so it doesn't rev up when started and is around
a good idle speed then the throttle won't go all the way up.
Does it sound like a carb rebuild or maybe the low jets need cleaned?
I use it frequently (usually at least once a week), however this issue started after I hadn't run it for 2 weeks which of course is a short amount of time. At the time I did'nt know you are supposed to run fuel out after every use so there was fuel in there and during that time there were some big storms and this boat is on a dock uncovered. I do always add sta-bil to the fuel.
Basically when you start moving and go to hit full throttle it just barely gets going, I can get it up to about 20mph usually but right now maybe it gets 4-5mph.
The carb was rebuilt a yr ago.. it didn't need it except the previous owner tried to clean it and couldnt get it back together so I took it in and had it done.
Here's what I have done so far:
Checked compression: both sides around 130 (128 & 130)
New plugs
New fuel tank
new fuel lines (tank to motor)
cleaned out fuel filter
Did a Seafoam cleaning (3/4 gallon gas to one 16 oz bottle of seafoam.. run for 15 min, sit 15, run 15 sit 15)
I tried to adjust throttle bar but that hasn't gone well either. If I set it so it doesn't rev up when started and is around
a good idle speed then the throttle won't go all the way up.
Does it sound like a carb rebuild or maybe the low jets need cleaned?