I recently purchased a 1990 Lund rebel pike special. It has a 28 hp Johnson motor. The motor seams to start well when using chock. However once the motor starts it idles fine for while (about 2 min), then it coughs and dies. When I restart the motor I get the same results (I have not run the RPMs up at all it is at the factory idle.) That is my first problem. The engine is not up to temp yet, I can touch it, it is warm but not very hot. Once it gets warmed up, when I cant tough it any more it will idle fine. I can rev it up a little and it will stay running, probably just a cold engine. Water temp was only about 38-39 deg Fahrenheit.
Now that the engine is idling fine, I accelerate to WOT and it takes off with plenty of power. If I throttle back to about half or less throttle to slow down the engine runs way down and dies (like it ran out of gas). Then it is very hard to restart. I have not used the choke once the engine is warm. Now when I get the engine to start it has absolutely no power it will not rev very high maybe 1/3 of full rpm Event if I go wide open. If I shut the motor off and wait about a minute and start it the motor starts right up and run fine until I pull back the throttle.
I have rebuilt the fuel pump and cleaned the crabs thoroughly. New plugs with correct gap. New fuel 92 octane no ethanol. The motor would not rev up at all with the old fuel pump. I have not push the choke when having these problems, I was told by the local deal to try that how ever I have tried the pump the primer ball with not change in the motor when it is running poorly, I have also take the fuel cap off to make sure that I was not creating a vacuum in the tank.
Now that the engine is idling fine, I accelerate to WOT and it takes off with plenty of power. If I throttle back to about half or less throttle to slow down the engine runs way down and dies (like it ran out of gas). Then it is very hard to restart. I have not used the choke once the engine is warm. Now when I get the engine to start it has absolutely no power it will not rev very high maybe 1/3 of full rpm Event if I go wide open. If I shut the motor off and wait about a minute and start it the motor starts right up and run fine until I pull back the throttle.
I have rebuilt the fuel pump and cleaned the crabs thoroughly. New plugs with correct gap. New fuel 92 octane no ethanol. The motor would not rev up at all with the old fuel pump. I have not push the choke when having these problems, I was told by the local deal to try that how ever I have tried the pump the primer ball with not change in the motor when it is running poorly, I have also take the fuel cap off to make sure that I was not creating a vacuum in the tank.
