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860 Gas boiling

A

Anonymous-0

Well-known Member
My 860 will boil gas when I run it hard...the engine temp is normal though...just hot air I guess migrating up the gas tank.
All shielding is in place and the engine runs perfect...is this normal?
 
I would check all shielding in the parts book against what is actually there if you have not already. Would not be the first time somebody has been mistaken going by only what is on the tractor. Just a thought.
 
I believe your tank has lost it's ability to vent itself. You need one of those $65 New Holland vented gas caps. Your in luck if you still have the original, dome-style cap because NH does have a free replacement program that is still in operation. I know because I recently got mine replaced in an exchange. Do a search on this blog for "vented gas caps" and you will find the appropriate official documentation referenced. It took me several weeks to get it because the NH parts people knew little about this old program.
 
I've read on this site about people wrapping their fuel lines with some sort of thermal wrap to keep their gas from boiling. Also if the gas line is close to your exhaust manifold and you have a little leak, that would super heat the fuel. Just a thought.
Andy
 
Robert:
IF the muffler heat shield is in place AND radiator and cooling system is in good working order AND the radiator fan shroud is in place AND the engine timing is set correctly AND the centrifugal spark advance is working properly AND (most importantly) you avoid gasoline with alcohol, the fuel will not boil in the tank.

Dean
 
I just finished posting about the same problem. Im now looking for the thermal wrap for a gas line. Must be something inherant with this model.
 
In a word. YES! Any one who has not had the gas boil in one of these, has not worked it hard!
That said, checking all the things listed below would be a good idea. I know that when the radiator on my 1964 4000 sucks up some leaves or "stuff", the engine will get hotter than normal.
I have the good Ford supplied vented gas cap. It whistles real nice when the gas boils!
Blaming it on the "new" gas? Ours did it in 1964 from the start. Winter blend of gas does have a lower "vapor presure".
Keith
 

2 words --> Ceramic Wool.

It looks just like fiberglass insulation, but can withstand a cutting torch's flame.

Commonly you can find it in hardware plumbing section and it is used for protecting stuff when you sweat solder copper pipe. Often it is sold in a 12x12 square with aluminum backing. Get 2 some and put it (foil down) under the tank to protect it from engine and exhaust heat. When you do, you may find that the old shielding is bent and touching the tank or has a rust hole.

jb
 
(quoted from post at 08:22:17 04/05/10)
2 words --> Ceramic Wool.

It looks just like fiberglass insulation, but can withstand a cutting torch's flame.

Commonly you can find it in hardware plumbing section and it is used for protecting stuff when you sweat solder copper pipe. Often it is sold in a 12x12 square with aluminum backing. Get 2 some and put it (foil down) under the tank to protect it from engine and exhaust heat. When you do, you may find that the old shielding is bent and touching the tank or has a rust hole.

jb
Click to expand...



kinda like the magic ceramic tiles on the space shuttle... :lol:

gas line heating(vapor lock) is common, fuel tank boiling is less common.
 
my uncles 800 would boil the gas in the tank. Sometimes in Sept. the air temp could get hot. then pulling a corn chopper hour after hour day after day week after week the engine could get hot. He tried different things like removing the grill screen and a sheet of asbestos under the tank.
 
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