SMALL - espritmodel.com SMALL - Telemetry SMALL - Radio
Reply
Thread Tools
Old Dec 04, 2005, 05:28 PM
Fly it like you stole it..
Tram's Avatar
Florence, Al
Joined Oct 2000
29,310 Posts
Gas in my oil? What would cause this?

Hey guys-

My riding lawn mower is getting gas in the oil somehow???

Anyone know how this might go about happening?
Tram is offline Find More Posts by Tram
Reply With Quote
Old Dec 04, 2005, 05:46 PM
Registered User
vintage1's Avatar
East Anglia, UK
Joined Sep 2002
29,703 Posts
Someone opened the oil cap and put in some gas...

..thats about the only way it can happen.

There is no other connection between gasoline and oil circuits that I can think of.

Other than a freaky failure of two sets of pipes.
vintage1 is offline Find More Posts by vintage1
Reply With Quote
Old Dec 04, 2005, 05:52 PM
Registered User
Mr.RC-CAM's Avatar
USA
Joined Oct 2001
5,188 Posts
It could be a couple of things, but I would suspect the carb first. Is the engine hard to start? Have you experienced flooding? Do the plugs show any signs?

Lastly, as Vintage mentioned, any chance someone in the family decided to refuel and picked the wrong hole?
Mr.RC-CAM is offline Find More Posts by Mr.RC-CAM
Reply With Quote
Old Dec 04, 2005, 05:53 PM
Suspended Account
Joined Apr 2004
2,020 Posts
Tram,,this is a easy one..if you are lettting that goat in your avaitar change your oil..he evidently cant tell when hes putting oil in the gas/oil compartment..please take off his pvc pipe...so he can see again..
rumme is offline Find More Posts by rumme
Reply With Quote
Old Dec 04, 2005, 06:00 PM
I don't want to "Switch Now"
pmackenzie's Avatar
Toronto (Don Mills), Canada
Joined Dec 2002
16,934 Posts
WAG-
If it has a mechanical engine-driven fuel pump, then a leak there could let fuel enter the crankcase.
My brothers 69 Chevelle ( he had it in the early 80s) did exactly the opposite. A bad diaphragm was letting oil get into the fuel.
Tons of blue smoke. Probably gas was going the other way as well, but it burned about a quart of oil every other day, so there would be no time for it to accumulate.
Pat Mackenzie
pmackenzie is online now Find More Posts by pmackenzie
Reply With Quote
Old Dec 04, 2005, 06:00 PM
Suspended Account
Joined Apr 2004
2,020 Posts
this sounds like something Jiffy Lube would do..lol...boy ive heard some horror stories about those guys..
rumme is offline Find More Posts by rumme
Reply With Quote
Old Dec 04, 2005, 06:29 PM
Registered User
vintage1's Avatar
East Anglia, UK
Joined Sep 2002
29,703 Posts
Quote:
Originally Posted by pmackenzie
WAG-
If it has a mechanical engine-driven fuel pump, then a leak there could let fuel enter the crankcase.
My brothers 69 Chevelle ( he had it in the early 80s) did exactly the opposite. A bad diaphragm was letting oil get into the fuel.
Tons of blue smoke. Probably gas was going the other way as well, but it burned about a quart of oil every other day, so there would be no time for it to accumulate.
Pat Mackenzie
Not sure about that - don't think MY ride on mower HAS a fuel pump..all gravity feed.

Tons of blue smoke and oil in the combustion chambers is more likley to be worn or broken rings, especially in engines that feed the oil breather back into the inlet manifold.
vintage1 is offline Find More Posts by vintage1
Reply With Quote
Old Dec 04, 2005, 06:35 PM
Thanks for the Fish!
aerogel's Avatar
Land of cajuns
Joined Dec 2001
1,066 Posts
7 post in a thread with the words gas and oil in it and know one has blamed bush yet......we have a record.....
aerogel is offline Find More Posts by aerogel
Reply With Quote
Old Dec 04, 2005, 06:46 PM
Quick! Pull my finger!
alan_scott's Avatar
Joined Jul 2005
169 Posts
If the fuel tank is higher than the engine, check the needle & seat in the carb. It could be flooding the carb, letting the fuel drain down the manifold, past the intake valve and then seeping around the piston rings into the crank case.


on edit:

Blame Bush.
alan_scott is offline Find More Posts by alan_scott
Reply With Quote
Old Dec 04, 2005, 06:53 PM
Suspended Account
Silent's Avatar
New York City
Joined May 2005
698 Posts
Quote:
Blame Bush
Ha....
Silent is offline Find More Posts by Silent
Reply With Quote
Old Dec 04, 2005, 08:56 PM
Registered User
LTChip's Avatar
Helena, MT
Joined Feb 2003
2,916 Posts
Head gasket?
LTChip is offline Find More Posts by LTChip
Reply With Quote
Old Dec 04, 2005, 10:31 PM
Registered User
California
Joined Feb 2005
1,519 Posts
Most likely , it is excessive blow by passed the piston rings. How many hours do you suppose is on that engine?

Quote:
alan scott:If the fuel tank is higher than the engine, check the needle & seat in the carb.
It could be flooding the carb, letting the fuel drain down the manifold, past the intake valve and
then seeping around the piston rings into the crank case.
Thats a possibility. Only, I would suspect that the engine would be very difficult to keep running
with any type of reliability.Tram did not mention how or if the thing runs. Also. This can only be true if its an overhead valve engine, or maybe a horzontial lying down on its side engine.
freddy warbird is offline Find More Posts by freddy warbird
Reply With Quote
Old Dec 04, 2005, 10:34 PM
Registered User
California
Joined Feb 2005
1,519 Posts
What model of lawn Tractor is it. what year is it.
freddy warbird is offline Find More Posts by freddy warbird
Reply With Quote
Old Dec 04, 2005, 10:41 PM
Government is a fearful master
electroman7's Avatar
United States, TX, Farwell
Joined Feb 2001
157 Posts
Quote:
Originally Posted by alan_scott
If the fuel tank is higher than the engine, check the needle & seat in the carb. It could be flooding the carb, letting the fuel drain down the manifold, past the intake valve and then seeping around the piston rings into the crank case.


on edit:

Blame Bush.

This is most likely if your engine is gravity feed for the fuel.. If the fuel is delivered via a mechanical fuel pump where the pump is attached to the engine, it is likely that the pump diaphram is leaking gasoline which runs out of the pump and down to the oil sump.
electroman7 is offline Find More Posts by electroman7
Reply With Quote
Old Dec 04, 2005, 10:59 PM
Registered User
California
Joined Feb 2005
1,519 Posts
Quote:
electroman7 :This is most likely if your engine is gravity feed for the fuel.. If the fuel is delivered via a mechanical fuel pump where the pump is attached to the engine, it is likely that the pump diaphram is leaking gasoline which runs out of the pump and down to the oil sump.
I don't know. Most mechanical fuel pumps have the diaphram well below the opening where the rocker lever extends into the block. I know this picture is of a typical automotive pump, but you can see what I mean. I am assuming Trams lawn tractor is a little one with probably a briggs & straton on board. Its not going to have a pump like this one. It will most likely has a pump attached to the carb.
freddy warbird is offline Find More Posts by freddy warbird
Reply With Quote
Reply


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Discussion What would cause this weird shake on my heli? BowerR64 Micro Helis 15 Jun 23, 2007 11:50 PM
Discussion What would cause this in a LensRC 22 Valid8r Power Systems 4 Sep 09, 2006 11:33 PM
Discussion What would cause this on the Blade CP? I'll try anything.. jmdombr Micro Helis 13 Mar 18, 2006 12:56 AM