minercod - Mercury 50 Running Bad

[minercod]

started year by taking pontoon to lake,50 hp merc 2stroke ran like poo,cutting out ,no power,unless choked,gummed carbs,rebuilt carbs,ran a little better,no top end,rebuilt fuel pump,changed spark plugs,changed fuel lines,pump ball,cleaned pickup tube,cleaned carbs again,found hole in float,replaced all floats and needles,engine runs great in nuetral or in gear until under load at laken raise prop to barely in water sprays water 50 ft in air runs great,drop prop in water max rpm 3200,no guts ?????

 

[racerone]

Is this a new instalation ?-------Has compression been checked ?------Has spark been checked ?---------Are you running the correct prop for a slow / heavy boat ?

 

[minercod]

no,it ran well last year,comp.tested 118 all three,checking prop now,but pretty sure boat ran good after prop install last year

 

[Scott Danforth]

Welcome aboard.

Slow down, take some time to add some spaces and punctuation.

We can and will help you one step at a time

Is this boat new to you, or have you had it for a bit?

Year and serial number of your merc?

Are you running pre-mix or is this motor injected?

If your prop is out of water and spraying 50 fert, your prop isn't deep enough

How did you clean your carbs? Did you simply spray them, or take the time to soak them, and chase each passage with a fine wire?

Did you perform a link-n-sync after?

What are the compression numbers?

What you describe sounds like fuel system related. Could be dirt in carb, could be bad fuel pump, could be blockage or low flow, could be bad fuel

 

[minercod]

2002 merc serial ot695355,model 1050412AD ,soaked carbs,comp. 118 all three,just raised prop to hear rpm without load,when i put prop down rpm topped at 3200,rebuilt fuel pump twice,replaced all fuel lines,filters,dumped all old fuel,ball pressures up good,has flow,motor runs great until in water with load

 

[Scott Danforth]

Any motor will run ok out of water without a load on very very very little fuel. To do so under load takes fuel.

The compression numbers are ok (ok, not great)

How do the plug colors look? I bet your running lean.

 

[minercod]

#1 rich with little fuel on it,2 and 3 look good,cant keep constant pressure when pumping ball,not running

 

[minercod]

how to link and sync

 

[minercod]

MINERCOD

so as i previusly posted i have 2002 merc 50hp 2 stroke on my pontoon,ran great and then it sat for 8 months in az.when i took it out it ran terrible barely start,no wot spit and sputter,so i got kits and rebuilt carbs,no help,dumped all fuel ,replaced all fuel lines and ball,,ran better but only to4000 rpm WOT,changed plugs,checked compression ,no change,put temp fuel tank on ,no help,rebuilt carbs again this time soaking 6 hours,still no better,no rebuilt fuel pump,no help, how much fuel should flow thru pump when engine running,engine tops at 6000 in nuetral missing some any suggestions would be great l

 

[GA_Boater]

Moved your new thread into your existing thread. Please don't start new threads on the same problem, history is lost and we get confused with split threads.

Please make your posts easier to read. Sentences would help.

How are you seeing 6000 RPM in neutral? In the lake or on muffs? Either way is bad and not good for your motor.

 

[MH Hawker]

6000 in neutral, that is a sure fire was to trash a motor