MF 65 FUEL ISSUE MYSTERY SOLVED

Rich65

New User
Hello I'm fairly new to the group. I recently posted about a fuel problem I had with my 1959 MF 65. I read a few other posts with guys having the same issues but didn't see any follow up comments. My old gas running 65 started having fuel issues where it would shut down under a load. I removed the carb and discovered it was filled with rusty sediments. I did a complete rebuild of the carb (all new parts, gaskets, filters and floats). Removed and cleaned the tank and replaced all the lines and filters. Tractor started right up, ran great for about a minute then stalled out. I could get it started ten seconds later and then it would die again. I removed and inspected and cleaned the carb out 4 times. Still the same problem. I was told I might have a restricted fuel flow so I eliminated the shut off valve, replaced the universal filter and lines with a larger diameter size. Still same problem. I had good gas flow to the carb. Exhausted on focusing on the carb I read about guys that had issues with their coil so I replaced the coil, then the condensor and then the voltage regulator. Still the same problem. Tractor would start, run a minute then stall. I then discovered fuel leaking from the large air hose coming from the front of the schebler carb. I read that it could be a float issue and was told to check the position of the float. Took apart the carb a 4th time. Noticed the float was off. I readjusted the float (1/4" as directed, parrallel to the carb). I got excited that I discovered the issue but once again the tractor would die after running a minute. At this point I threw in the white towel and bought myself a newer model kubota. A week later I found some energy to attack the massey again figuring I can't sell it or move it out of my way until I get it running. I took apart the carb a 6th time. Broke it down and recleaned all the orifices. I couldn't help but notice there wasn't alot of play in the float. Being a rookie with tractors I had no experience with comparing it to other floats and how they are supposed to function. I decided to bring the broken down carb to my local tractor repair shop. I explained my thoughts and issues about the carb and the repairman took one look and said "there's your problem". The little metal bracket that holds the connecting pin for the float had a small 90 degree edge on it which restricted it from moving properly. A light bend of that tab was all it took. This experienced mechanic knew of this procedure but the instructions that come with the rebuild kit NEVER addresses this procedure. He guarantee'd that was my probem. I went straight home, reinstalled the carb and it turned over on the first crank and ran smooth as could be without stalling. I cracked open a beer and did the happy dance. Now who want's to buy a good running 1959 Massey 65? lol. I'm just passing on this long winded message to possibly help the next guy and save him hours of endless searching and swearing trying to find a solution to their carb rebuild issues. And for all my fellow tractor lovers that took the time to comment and try to help with my fuel issue I thankyou very much for that. Much appreciated! This group is awesome.
 
Hello I'm fairly new to the group. I recently posted about a fuel problem I had with my 1959 MF 65. I read a few other posts with guys having the same issues but didn't see any follow up comments. My old gas running 65 started having fuel issues where it would shut down under a load. I removed the carb and discovered it was filled with rusty sediments. I did a complete rebuild of the carb (all new parts, gaskets, filters and floats). Removed and cleaned the tank and replaced all the lines and filters. Tractor started right up, ran great for about a minute then stalled out. I could get it started ten seconds later and then it would die again. I removed and inspected and cleaned the carb out 4 times. Still the same problem. I was told I might have a restricted fuel flow so I eliminated the shut off valve, replaced the universal filter and lines with a larger diameter size. Still same problem. I had good gas flow to the carb. Exhausted on focusing on the carb I read about guys that had issues with their coil so I replaced the coil, then the condensor and then the voltage regulator. Still the same problem. Tractor would start, run a minute then stall. I then discovered fuel leaking from the large air hose coming from the front of the schebler carb. I read that it could be a float issue and was told to check the position of the float. Took apart the carb a 4th time. Noticed the float was off. I readjusted the float (1/4" as directed, parrallel to the carb). I got excited that I discovered the issue but once again the tractor would die after running a minute. At this point I threw in the white towel and bought myself a newer model kubota. A week later I found some energy to attack the massey again figuring I can't sell it or move it out of my way until I get it running. I took apart the carb a 6th time. Broke it down and recleaned all the orifices. I couldn't help but notice there wasn't alot of play in the float. Being a rookie with tractors I had no experience with comparing it to other floats and how they are supposed to function. I decided to bring the broken down carb to my local tractor repair shop. I explained my thoughts and issues about the carb and the repairman took one look and said "there's your problem". The little metal bracket that holds the connecting pin for the float had a small 90 degree edge on it which restricted it from moving properly. A light bend of that tab was all it took. This experienced mechanic knew of this procedure but the instructions that come with the rebuild kit NEVER addresses this procedure. He guarantee'd that was my probem. I went straight home, reinstalled the carb and it turned over on the first crank and ran smooth as could be without stalling. I cracked open a beer and did the happy dance. Now who want's to buy a good running 1959 Massey 65? lol. I'm just passing on this long winded message to possibly help the next guy and save him hours of endless searching and swearing trying to find a solution to their carb rebuild issues. And for all my fellow tractor lovers that took the time to comment and try to help with my fuel issue I thankyou very much for that. Much appreciated! This group is awesome.
I think you are talking about the "float drop adjustment"?
 

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