Johns 4hp won't maintain steady rpm

[ziggsdna]

I have a 4 hp that runs fine but when you are moving along it seams to lose power and wants to die. Do i have a carb problem or what I need to get this fixed *** it is my back up motor so if my main motor fails Im stuck paddeling i appreciate any help

 

[Xcusme]

Re: Johns 4hp won't maintain steady rpm

Well, start by posting the model number...the more info you give us...the more help we can give you. Is this a 'new to you' motor?
Start by checking to see if the motor is overheating, put a finger on the head, is it blazing hot?
Is the water pump working? Is there a spray of water from the midsection showing that the water pump is working?
Work the primer bulb in the fuel line, does the motor improve? If it does, you could have a faulty fuel pump.

Post back your findings....