Is that in the years with the plastic cam?

 

Spark plugs/wires? Air filter? Some bum gas?

 

The mfg. date on the engine label is stamped....08/98.. Meaning it was assembly in August 1998.

I read on this forum or another that the plastic was replaced by metal one in late 1997. Correct me if this date in wrong.


NOTE: New air filter also. Ignition coils tested out as per specification, as fuel pump.

 

I had this same problem after I replaced the plastic cam. I was just about to take apart the carb and clean it up. I seen a can of seafoam and decided that would get the first try. I added 3 oz to the gas tank. After the first 3 laps the surging was gone and it ran like it did prior to the fix.

 

I believe the plastic cam gear was in the FD590V 18hp. I think the FD611V 20hp. has steel. Tractor serial # 70,000 and above OK is what I was told.
Dave

 

General,
What's the difference between Seafoam and Marvel Mystery Oil? I have used MMO for many years. I looked at the Seafoam website and it appears to do the same thing as MMO.
dave

 

Dave, I guess I really don't know what the difference is. I have never heard of Marvel Mystery Oil though? If it works as good as Seafoam then I now know of two miracle workers.

 

Gentlemen, problem solved. Courtesy(sp) of the federal government..EPA
Woke up in middle of night..brain went combat mode.
I own a EGZO 295cc 4 stroke gas Golf cart, that had been stalling and running poorly. After some time with a golf course mechanic, we removed the carburetor. All the latest golf cart engines, lawn mowers, garden tractors, and who knows what else...have these carburetors with the little pilot jet screw..with the black plastic tang that one can only turn the screw about 3/4 of a turn in or out. This is the California smog control law thats been in effect. I removed the black plastic tang on the golf cart carburetor, and replaced with with a small bolt with same size threads, and blocked the hole. No more trouble with the golf cart stalling or running rough.

Today... I removed the carburetor on this infamous..JD Model 345 with the Kawasaki 20 hp water cooled engine. shaved the black plastic tip off the pilot jet screw, and removed the pilot jet..or what ever it's called. Foud me a small bolt with same size threads, and plug the hole. Installed the carburetor...Wow!.. The John Deere roars to life.. idles like it came from the factory..Has more pep, go, and runs soooo smoooth..

Like we say here in my part of the country...We have so many ways to please you, you are bound to like one of them.

 

How is your gas consumption rate now? :wwp: :thanku:

 

WOW!!! THAT"S OUTSTANDING!!! :thanku:
So, what's that jet screw thingy good for anyway? Maybe we should all take 'em out.....
Good job,
Dave
I do love this site!

 

Just food for thought; I believe all 87 and 89 octane gasoline in Wisconsin is sold with up to 10% ethanol and I have heard that the ethanol could cause problems with carbureted motors. I always try to use 100% gasoline in my lawn mower and snow blower which is usually the higher octane gasoline like 91 or 93 octane. I have also recently noticed that the higher octane gasoline is labeled as "recreational gasoline”. Maybe this has been discussed before on this forum but it could be part of the problem that FD611V is experiencing.