F200 4 Stroke Fuel Problem

I Work And Live In Papua New Guniea, I Have A 2004 F200 O/b On A 22 Ft Centre Console The Motor Has Done 1500 Hrs And Has A Problem Bogging Down When You Start To Go, Engine Starts, Idles, And Trolls Well, But When You Try To Give It Full Throttle Straight Away It Boggs Down And Can Stop Some Times, When This Happens If You Hand Prime The Fuel Pump The Engine Will Pick Up. I Have Tried Fitting The 25 Litre Fuel Plastic Tank Direct To The Engine Bypassing The Racor Fuel Filter, And Makes No Diffrence, I Have Replaced The Spark Plugs, Had The Injectors Removed And Cleaned By Yamaha And Fitted A New Low Pressure Pump And High Pressure Pump This Also Has Made No Diffrence, Any Ideas?

Re: F200 4 Stroke Fuel Problem

sounds like a fuel restriction
get a vacuum/pressure test on the fuel lines to make sure

Re: F200 4 Stroke Fuel Problem

What have we found out so far?
>>
>> 1. fuel pump (low pressure) does not work when connected in engine
>> 2. when we take it out - connect hoses to it, supply fuel, connect to
>> battery then it does work - pumps fuel
>> 3. fuse to pump blown - replaced it but unfortunately did not solve
>> problem
>> 4. using a multi meter found that there was a circuit to pump but earth
>> did
>> not seem to work
>>
>> Now we think the earth wire from the pump goes to the "" Regulator and
>> Drive Unit """ (I searched on internet for picture and that looks like
>> it)
>>
>> If we by pass this earth wire from the pump (we have not cut the wire
>> that
>> goes to the Drive Unit) then the pump works
>>
>> The question is
>>
>> 1. What else does the Regulator and Drive Unit do (can we just bypass
>> this
>> unit and just earth the pump??????)
>>
>> Your opinion will be MUCH appreciated.