carb sync question

[zindale]

hey you guys are great. i have a manual ordered be here in a day or two. question if i open my controls wide open should my carb plates be open fully i have a j115tslecm and my max rpms are only 4700 at 18 mph on 24 ft pontoon. with a 14x13 prop. with tt wont change rpms

 

[imported_lorin]

Re: carb sync question

On every motor I've seen, with the controls wide open, the throttle plates are supposed to be perfectly horizontal.

 

[emdsapmgr]

Re: carb sync question

Try going to an 11 pitch prop.

 

[OBJ]

Re: carb sync question

You might also want to raise the motor up a hole or two on the transom....this is something you'll have to play with. I've noticed that most toons are terribly over proped. What works on a boat hull don't work on a toon.

 

[zindale]

Re: carb sync question

i rebuilt carbs and plugs replaced wires and fuel bulb and installed filter, also did fuel pump rebuild runs better but still 4700-4800 rpms. i noticed that water was shooting up in front of engine where it mounts to transum noticed that engine is hanging down below water line and draggging in water so i moved it up 2 holes now about half inch out of water. havent retried yet .but i think im on to it