Force 70 cutting out at idle and at speed PLEASE HELP

[rubaggd]

I have a 93 Force 70 on a 93 Sea Pro 170 cc. The motor will run fine for the first few minutes after cranking it, but then, when you are wot after a while it will start missing/cutting out. I cleaned the fuel lines and filters today, pulled the plugs and cleaned them. I cranked the motor in the driveway (with muffs) and as I slowly added more throttle, it started cutting out.

My last boat had a 228 Mercruiser I/O so I am not familiar with outboards that much.

I have fuel going to the carb. Is it something in the ignition system? Is it the plugs? What could it be?

Any advice/help will be greatly appreciated

Thanks

 

[pnwboat]

Re: Force 70 cutting out at idle and at speed PLEASE HELP

Make sure the fuel tank vent is not plugged. If you have a built in tank, you can open the gas tank filler cap to allow air into the tank. Could also be the fuel pump diaphragm. If you have a primer bulb, try squeezing it when it starts to cut out. If this fixes the problem, then definitely replace the fuel pump diaphragm.

 

[jerryjerry05]

Re: Force 70 cutting out at idle and at speed PLEASE HELP

Check for water in the fuel.Rebuild the fuel pump.Clean the carbs.Do a compression/spark test.In-line sparkies work good while it's running.
Ethanol is messing with old hoses and plastic.Any inline connectors can go bad.
Replace all the hoses,squeezie too.Jerry