MEP-531A issues

[robson1015]

Just bought this unit with 5 hours on it. Starts very easily but runs erratic and belches blue/white smoke. Won't run smoothly, sputters. The fuel lines have been replaced by previous owner and I replaced the broken return fuel line(clear hose). I bled the fuel lines by way of the two screws on the filter housing. I ran diesel fuel conditioner through it hoping that it was just a clogged injector. This unit looks like new and Any and all help, suggestions would be appreciated. I hope I am overlooking something small. Thank You - Bob

 

[DieselAddict]

Does the throttle linkage move up and down while its belching or does it stay all the way to the top?

Can you shoot a video of it running with the video concentrating on the speed control linkage?

 

[R Racing]

Ok I have a few of these . And only 2 things I have found cause this issue.1st Air in the fuel line or loose clamps, sucking air. 2nd to much oil in the crank case !

 

[DieselAddict]

Lets hope its not gasoline in the fuel.

 

[robson1015]

The oil level is ok and I checked all the clamps. I didn't take the clear filter bowl off. There is probably an O-ring on the connection. Thought about checking that next.

 

[robson1015]

I don't have video capability.

 

[robson1015]

I didn't notice the linkage moving.

 

[robson1015]

There is air space in the clear fuel return line. Is this normal??

 

[R Racing]

Yes at first its normal . but at some point and time it should purge itself. I will say if your 3 or 4 tablespoons to full of oil this engine doesn't like it at all !!!! and they will hunt and smoke terrible !! I have both the AC and DC versions. And with my DC unit I had barely over filled it ( honestly I still thought I could have put more in it ) I ran it several hrs . Went backed and I know I had checked the oil at least 3 times. Then checked it again and it was maybe 3/32 above the full mark. Drained out just a bit of oil and it stopped smoking and stopped hunting . It has been fine since .

 

[robson1015]

I will recheck the oil. With the dipstick screwed all the way in it reads on the full mark.

 

[robson1015]

Sucked out 3 syringes of oil with turkey baster syringe. Purrs like a kitten now. Reads 1/4" below the full mark. That was easy...Thanks to you guys for the quick responses. R Racing - thank you !!!

 

[R Racing]

Your welcome !! Hard to believe something like that can cause so many issues, LOL .

 

[DieselAddict]

I'm going to make a note about this. And I'm going to double check the oil level in the engine this morning. Its amazing that its that sensitive to the oil level.

 

[rustystud]

Also check the oil filter. The oil sensor is located by the filter and will not detect oil pressure if the filter is clogged.