Jump to content

Nominations for Tractor of the Month
Garden Tractors and Parts on eBay



Photo
- - - - -

GAS IN OIL

massey onan

  • Please log in to reply
6 replies to this topic

#1 noclue OFFLINE  

noclue

    New Member

  • Member
  • Member No: 8104
  • 57 Thanks
  • 45 posts
  • Location: Holmen,WI

Posted August 18, 2016 - 04:13 PM

I am stumped in my massey 1655. if I don't turn the gas off at the gas tank the entire gas tank will empty into the oil.  I replaced the float, needle, and all of the gaskets. I just don't know why this is happening. any help would be great! thanks


  • chieffan said thank you

#2 dropped82 OFFLINE  

dropped82

    Nut Case

  • Senior Member
  • -GTt Supporter-
  • Member No: 9923
  • 1,401 Thanks
  • 1,230 posts
  • Location: Indiana

Posted August 18, 2016 - 04:15 PM

Did you adjust the float? Regardless of how new the needle, seat, or gaskets, if the float is off adjustment it'll continue to do that.

Eric

Sent from my SM-G930P using Tapatalk
  • ducky, noclue, boyscout862 and 1 other said thanks

#3 chieffan OFFLINE  

chieffan
  • Senior Member
  • Contributor
  • Member No: 62695
  • 6,166 Thanks
  • 4,507 posts
  • Location: SW Iowa

Posted August 18, 2016 - 07:13 PM

Just went through that with an Onan.  Put a fuel shut off in the line and use it now so don't worry about it.  Have 3 other I shut the fuel off when I am finished using them.  These are not new tractosr we are working with by any means.


  • noclue said thank you

#4 grattone OFFLINE  

grattone
  • Senior Member
  • Member No: 66237
  • 222 Thanks
  • 167 posts
  • Location: Stanleytown, Va.

Posted August 18, 2016 - 07:56 PM

What engine, does it have a mechanical fuel pump? If so you may want to check it. I have heard of the pumps leaking into the block.


  • ducky, limebuzz and noclue have said thanks

#5 dropped82 OFFLINE  

dropped82

    Nut Case

  • Senior Member
  • -GTt Supporter-
  • Member No: 9923
  • 1,401 Thanks
  • 1,230 posts
  • Location: Indiana

Posted August 18, 2016 - 08:54 PM

What engine, does it have a mechanical fuel pump? If so you may want to check it. I have heard of the pumps leaking into the block.

Your on the money there also. I forgot about that. If the pump diaphragm has a tear, it'll leak through the pulse line into the block.

Eric

Sent from my SM-G930P using Tapatalk
  • noclue said thank you

#6 EricFromPa ONLINE  

EricFromPa

    Tractorholic

  • Senior Member
  • Contributor
  • Member No: 2135
  • 2,304 Thanks
  • 2,336 posts
  • Location: Bedford County Pa.

Posted August 18, 2016 - 10:12 PM

I second the Fuel pump being bad.

They will siphon a tank dry if there is enough room in the block.

 

1 small pin hole in the large diaphragm is all it takes for it to fill your block.Gas will run rite down the vacuum line and into the block.

 

 

Fuel pump rebuild kits are kinda salty but your going to need it.Valves in the fuel pump are closed while not running so no fuel can run through and into the carb unless the metal valves are bent,rusted or corroded.Betting it's the Diaphragm.

 

Here's the Kit for the B43M with the 2 bolt fuel pump and square carb.$70 shipped.One of the site sponcerers may be able to get it cheaper.

http://www.ebay.com/...hkAAOSw~CRTpE9S


Edited by EricFromPa, August 18, 2016 - 10:13 PM.

  • noclue and ENafziger have said thanks

#7 ducky ONLINE  

ducky

    Senior Member

  • Senior Member
  • -GTt Supporter-
  • Contributor
  • Member No: 564
  • 1,631 Thanks
  • 3,870 posts
  • Location: Freedom, WI

Posted August 19, 2016 - 11:26 AM

If the tank goes completely empty than it is the pump.  If there is fuel in the tank at carb level than it is the needle valve or float adjustment.


  • adolphsson09 and ENafziger have said thanks




Top