Starts ok, wont take off unless rvs r about 5000, and strugells at that

Hi,

It sounds like you've done a long list of troubleshooting activities. At this time, it might be good to call Ryobi and ask them for a local dealer that can provide a free in-person analysis of your machine in order to get it to start again.

Thank you.

Could have a fuel lock , fit a socket to the crank pulley nut and turn the motor by hand, if free check the cables from the battery to the starter if ok check the starter motor.

suggest you reinstall the cat converters as the computer needs them to set the fuel -air ratio. Instead of wasting money chasing "what may be" problems have the fault codes read and fix it properly.

The ignition module-is it a TFI module? I would check that. If not that, maybe the pick-up coil inside the dist?

Fuel pumps bad! Unless you have a clogged fuel filter!! Have great spark?

you still have to check fuel pressure and injector signal,so you need a pressure guage and noid light,

when my washer is switched on it sounds like the motor is strugeling to spin to the right.

I CHANGE CAM AND CRANK SENSOR,FUEL PUMP,COMPUTER BRAIN BOX AND COIL PACK STILL GETTING NO FIRE UNLESS I JUMP A FIRE WIRE FROM BATTERY

do a compression check i believe you will find you have a leaky head gasket pull the pluggs one at a time you will probably find one or more of them wet also check to see if oil is in the radiator orwater in the oil if you get good even readings with compression check check valve seats.

clean your carbs,i had the same issue