4 stroke help

[xd45c]

Alright Im trying to Get some info for my friend who's got an issue with his 86' quadsport. Went to go riding today and we noticed his " oil" was awfully water like. Turns out his "oil" ilwas pretty much all gasoline. We dipped into the oil and all that came out was gas. The motor has been recently rebuilt, but the rest of the quad is pretty much ghetto rigged to run with orginial/new/ parts from a motorcycle( bars haha and I think the throttle cable). His dad ghetto rigged the throttle cable somehow to get the quad to run so we are thinking possibly the throttle was stuck open while the quad sat for 3 weeks (waiting on rear shock) and completely flooded the motor out? Is that possible and if so where does he go from here, if not what are some other causes. I don't know what exactly was done to the throttle cable so I can't give more details into that.

Problem is that his drain plug is stripped and won't be coming out. Other than taking the motor apart is there any other solution to the problem? Possibly draining from where you actually pour oil in but I'm not sure that would get enough of the gas out to help things much.

Any thoughts/ ideas appreciated.

 

[2g00d4u]

gas in your oil? sounds like bad rings.
Was it burning oil when it was running last??

 

[xd45c]

gas in your oil? sounds like bad rings.
Was it burning oil when it was running last??

His oil, not mine.

There was no smoke coming from his quad the last time we rode. He says his quad was a bit low on oil the last time we rode though, today we had to tip the quad on its side to see the oil level( way too much "oil"). One time when we were riding weeks ago his quad stalled out (flooded?) and took about 10 minutes before it would start again, it shot a couple flames out as he was accelerating after he got it started.

 

[2g00d4u]

it sounds like the rings are bad, its the only way that gas could get into the case without being put in by someone.

My friend had the same problem on his uber old honda, it was burning a lot of oil and it stalled once and wouldnt start, and when we took the dipstick out, it was smoking heavily out the case, and when he turned it over, it started a fire in the oil pan. One REALLY bad thing that can happen you probably don't want to deal with.

 

[xd45c]

Thanks for the replies, I don't know a whole lot about the inner workings that's why I asked. Is there no way for gas to work it's way through the motor if the throttle is stuck open for 2-3 weeks and backs things up or something?( I know nothing of the inner workings of this
machine, remember? I:I that question is probably proof).

Actually a part I left out which I forgot about probably plays a part haha. Right on the case under the bolt that holds the clutch assembly ( the spring and what not) is a real small crack. I'd imagine that can't be helping the situation and would be an air leak..

His dad said that's always been there ( I guess since they fixed it up last year) and it's been running with the crack the way it is since then. The oil (/gas mixture) was bubbling out of the crack today when he started the quad up. His dad said the cracks been there but we've never seen oil bubbling out of there like it did today.

So with that extra bit of info... Now what haha?

 

[HawaiianBassHed]

pix, a vid may be better... sounds like he needs new motor cases and a full rebuild to me but I'm not an expert lol it could run "like sh*t" how it is tho. or just ok like it does til it goes to sh*t... just my thoughts lol

 

[sicivicdude]

On a 4 stroke a crack in the crankcase is just a hole for liquid to seep out of. The crankcase has a vent made into the top of it anyway. Scuff the crack with 40grit sandpaper and apply JB weld to it. Once the oil level is down where it's supposed to be, the crack won't ooze oil anymore.

The float needle is stuck. 4 stroke engines have the carburetor mounted high and pointed down into the motor. If the engine stops turning with the intake valve open and the carb floods, gasoline runs down into the engine. He needs to stop ghetto rigging everything and start fixing it correctly or he's going to screw something up much worse than it already is.

First off, fix the drain plug.

5-pc BOLT-GRIP? Base Set - Tools - IRWIN TOOLS

These will take out a bolt with a rounded head. Most autoparts stores stock them, some hardware stores might as well. He'll need to change the oil again eventually anyway... why not go ahead and fix the problem now?

Also, fix the throttle cable! He's going to riding through the woods and that rigged crap is going to hang wide open and then what will he be left with? A busted up quad and potentially a lot of hospital bills... A $30 cable is NOT worth a hospital stay. That will end up getting him hurt like that.

The last thing he needs to do is rebuild the carburetor. Purchase a carburetor kit and install it. Pay extra close attention to the float needle valve.

 

[xd45c]

Thanks for the help civic. I imagined that the motor could get flooded out through the carb but wasn't positive. Was also thinking JB weld would be a possible fix for the crack. The carb was rebuilt(properly) not too long ago, I'll tell him to pull it apart and have a look. I'm not sure what's wrong with his oil plug, but I think the threads were stripped not the head, probably lock tited it in there, but I'll find out more wbout that. Thanks again.

 

[caseywoods5]

i know exactly what it is my friend had that problem with his suzuki vinson 500. you have to turn off the fuel valve when you're done riding or the gas seeps into the cylinder and around the rings. just drain it and put fresh oil in, run it for a good days ride, then change with fresh oil again and repeat until you can't notice any gas in his oil. and another safety precaution when you turn off the fuel valve you can also start it and let it use all gas in the carb.

 

[xd45c]

i know exactly what it is my friend had that problem with his suzuki vinson 500. you have to turn off the fuel valve when you're done riding or the gas seeps into the cylinder and around the rings. just drain it and put fresh oil in, run it for a good days ride, then change with fresh oil again and repeat until you can't notice any gas in his oil. and another safety precaution when you turn off the fuel valve you can also start it and let it use all gas in the carb.

You know we thought of that, but the switch on the valve is stuck in place on the 20+ year old piece of sh*t haha. Anymore we will pull and clamp the hose when we are done riding.

 

[2g00d4u]

ya it sounds like you need a lot of new parts, no more zip ties and duct tape to keep 'er runnin.

 

[timsyfz]

If the valve is broke you can simply use a small vise grip and pinch the line off to keep fuel from going into the carb.

Id probably put something between the hose and vise grip so the vise grip does not ruin the fuel line ( I assume its an old line too)

 

[sicivicdude]

Briggs & Stratton® in-Line Fuel Shut Off Valve (5091H) - Small Engine Parts - Ace Hardware


Again a worthwhile investment... If the threads are stripped, you can go to an autoparts store and get an oversize double bolt. It's a single oversize thread for whatever size hole it is plus another smaller bolt inside of that bolt so the oil plug threads will forever more be steel on steel, not aluminum.

If it has been loctite'd into the case, you have to heat it to get the loctite to release. You do NOT want to heat the case with gasoline in the oil. It will cause gasoline vapors to come flying out and possibly result in an explosion.

Lincoln Hand Transfer Pump for Fluids - GEMPLER'S

You can feed the small line down into the fill hole and remove as much oil/gasoline mix as possible. Then refill the crankcase with some used/cheap oil whatever you have laying around to keep the heat from the propane torch from burning gaskets near the drain bolt. Then focus the heat from a propane torch onto the head of the bolt to heat it. Once you've been heating it for a minute, put the bolt extractor on it and try turning it out.

 

[xd45c]

Useful information, I'll pass it along to him, thanks again.