Gasket Repair= what skill level?

[KINGjosh]

IS a gasket repair simple to do? I would figure the only hard part would be breaking it down. Its a B/S 13.5hp. Gas is coming into the oil.

[jim dailey]

IS a gasket repair simple to do? I would figure the only hard part would be breaking it down. Its a B/S 13.5hp. Gas is coming into the oil.

Josh; first things first. Has the problem been diagnosed properly? Usually gas into the oil means carb. repair. Carb repair uses dry gaskets from a repair kit. I don't know the whole story on the problem, so please send more info. What exactly is the problem, and then maybe we can look for a cure. We even have some professional small engine technicians lurking around here.

[Restrorob]

Your right Jim ! There are a few of us Technicians bouncing around here.
You were also right about the carb. being the culprit,Thats the only source
that will put fuel in the crankcase.



14yr. Briggs and Stratton Master Service Technician
Kohler Factory Trained
Tecumseh
Honda
Kawasaki
Onan
Robin
Factory Trained Polaris ATV & Watercraft

[jim dailey]

Your right Jim ! There are a few of us Technicians bouncing around here.
You were also right about the carb. being the culprit,Thats the only source
that will put fuel in the crankcase.



14yr. Briggs and Stratton Master Service Technician
Kohler Factory Trained
Tecumseh
Honda
Kawasaki
Onan
Robin
Factory Trained Polaris ATV & Watercraft

Well, thanks for the compliment. I noticed you are Kohler and Kawasaki trained. I will have to keep that in mind, should I have any problems. OH NO, I just noticed the Old Town, Fl. I have a vacation and winter home in South Daytona. I have been trying to get to Old Town for some racing action. I should make a point of it next winter. I usually end up at New Smuyrna for the 9 nights of racing. Ever go there? JIM.

[KINGjosh]

Well this morning I go to fire it up and she wont even crank. As I kept pulling on the starter rope, a little bit of oil drips out of the muffler. So heres the crazy part, I check the oil level , and the dam oil level looks about 1qt over full. So I smelled the oil from the dipstick and sure enough it smelled like gas. What gives.

I haven't had it properly diagnosed by a mechanic. I kinda guest it was a gasket problem. Hoping someone on here can kinda see what it is.

I'm pretty mechanically inclined, I 've never taken my equipment to my dealer for repair, I have always figured out how to do stuff on my own.

[Restrorob]

Well, thanks for the compliment. I noticed you are Kohler and Kawasaki trained. I will have to keep that in mind, should I have any problems. OH NO, I just noticed the Old Town, Fl. I have a vacation and winter home in South Daytona. I have been trying to get to Old Town for some racing action. I should make a point of it next winter. I usually end up at New Smuyrna for the 9 nights of racing. Ever go there? JIM.



No Jim I never been to New Smuyrna, In fact I don't Know of any Racing that goes on around here,Maybe theres another Old Town Here in FL. Or maybe you know something I don't. I moved up here 14yrs. ago from Tampa.
I'm about 35 miles west of Gainesville,What kind of Racing is it ?

[beransfixitinc]

You were also right about the carb. being the culprit,Thats the only source
that will put fuel in the crankcase.


I'm sorry, but that statement is false.

[Starman]

I'm sorry, but that statement is false.
What's your diagnosis?

[jim dailey]

No Jim I never been to New Smuyrna, In fact I don't Know of any Racing that goes on around here,Maybe theres another Old Town Here in FL. Or maybe you know something I don't. I moved up here 14yrs. ago from Tampa.
I'm about 35 miles west of Gainesville,What kind of Racing is it ?

Old Town is right outside of Delend, which is sw of Daytona.

[KINGjosh]

Does anybody have any suggestions? :waving:

[Restrorob]

Ok Josh, Get the Model,Type and code numbers off your engine and go to your dealer and get a carb. rebuild kit. Get a can of carb.& choke spray cleaner, Take the carb. off and take it apart and clean it good.If you have a air compressor blow it out good and install all the parts in the kit there will be some parts you will not need,Do not take the welch plug out. Briggs put two differant brand carbs. on this engine a Nikki or Walbro the dealer will need to know which you have ? Pay attention to the fuel inlet needle, One has a rubber tip on the end If yours does do Not try to remove the brass seat. It will be fine. If you have the hard tip needle there is a rubber seat in the bottom that MUST be replaced,Do not scratch the inside of the brass digging
the old rubber out,MOST important there is a small ring around one side of the new rubber seat that MUST face to the bottom of the hole,Push it all the way to the bottom with the shank end of a drill bit that fits the hole. Reassemble and reinstall carb.,Change the oil and replace the oiled down spark plug and you should be ready to mow.
It's gonna smoke pretty bad till it burns the oil out of the muffler.
Hope this is of help !

[Restrorob]

Hey starman If beransfixitinc had a diagnosis wouldn't you think he would have backed his stupid statement up with it :cool2:

[KINGjosh]

Ok Josh, Get the Model,Type and code numbers off your engine and go to your dealer and get a carb. rebuild kit. Get a can of carb.& choke spray cleaner, Take the carb. off and take it apart and clean it good.If you have a air compressor blow it out good and install all the parts in the kit there will be some parts you will not need,Do not take the welch plug out. Briggs put two differant brand carbs. on this engine a Nikki or Walbro the dealer will need to know which you have ? Pay attention to the fuel inlet needle, One has a rubber tip on the end If yours does do Not try to remove the brass seat. It will be fine. If you have the hard tip needle there is a rubber seat in the bottom that MUST be replaced,Do not scratch the inside of the brass digging
the old rubber out,MOST important there is a small ring around one side of the new rubber seat that MUST face to the bottom of the hole,Push it all the way to the bottom with the shank end of a drill bit that fits the hole. Reassemble and reinstall carb.,Change the oil and replace the oiled down spark plug and you should be ready to mow.
It's gonna smoke pretty bad till it burns the oil out of the muffler.
Hope this is of help !

O.K. , But i cant figure why gas would be in the oil, or oil dripping out of muffler? I'm perplexed on this.

[beransfixitinc]

What's your diagnosis?

Oh, no, the carb leaking by is more than likely the correct diagnosis here. But the carb leaking by is not the only way gas can get into the cylinder, and there are at least 2 mowers in the shop right now that are proof of that.

And both from the same person.. from pouring the gas in the wrong cap.. which i'm not really sure how people manage to do.

[beransfixitinc]

Hey starman If beransfixitinc had a diagnosis wouldn't you think he would have backed his stupid statement up with it :cool2:


And "restrorob", you being in Florida should see the "gas in the wrong opening" problem often enough. And watch who you are calling stupid.. lest you become the bobby of the south.

[Restrorob]

OK Josh , If the float valve is bad or trash gets in it the fuel doesn't shut off so the carb. floods,If the intake valve is open the fuel runs right into the cylinder If the exhaust valve is open also,fuel will run out the exhaust port into the muffler, It will also seep past the rings and into the crankcase.
Hope this sets you stright !
I've been a Master Service Technician for 14 years,The advice I give is the way I've been repairing Equipment all those years,I'm on here to help people out ! Not to have mower pushers tell me my business,Although I would like to thank them for making me a handsome living !!!


If you need more help Josh just Holler !

[Restrorob]

And "restrorob", you being in Florida should see the "gas in the wrong opening" problem often enough. And watch who you are calling stupid.. lest you become the bobby of the south.

Let me tell ya this!!!! In my 14 years I've never had a customer bring me a machine they had put gas in the crankcase !!!!!
Must be a Texas thing !!!!
And I didn't call you stupid I called your statement stupid !!!!!

[KINGjosh]

restorob, you are the main man. I went to the dealer today, and before I order the part I went to the service part and told them the same story. They immediately said the same thing you said," carb problem". I had the option of getting the rebuild kit for $30, but I decided to get a whole new carburetor for $67. Only because I have never rebiult a carb before, and this is a ASAP job, I cant be spending a couple of hours trying to figure it out, and knowing me I will probably mess with something I'm not supposed to.

Once again, Thank you restorob!

[Restrorob]

Thanks for the compliment Josh , Maybe some of these other guys can see I do know what I post about !!!! If I dont know I wont post !!!!
Now you can tear into that old carb. and just check it out as I explained, Then you will be ready to do that job in less than a hour should it happen again.

Glad I could Help :cool2:

[hole in one lco]

Thanks for the compliment Josh , Maybe some of these other guys can see I do know what I post about !!!! If I dont know I wont post !!!!
Now you can tear into that old carb. and just check it out as I explained, Then you will be ready to do that job in less than a hour should it happen again.

Glad I could Help :cool2:
thats what i do buy new and tinker later

[fixer67]

Let me tell ya this!!!! In my 14 years I've never had a customer bring me a machine they had put gas in the crankcase !!!!!
Must be a Texas thing !!!!
And I didn't call you stupid I called your statement stupid !!!!!

Well they must come up here on vacation because I have seen it happen here as well. The new Briggs push mower type engines have the gas and oil both on top and I have seen them get mixed up. And there is another was for gas to get in to the crankcase,,the fuel pump. Cam operated fuel pumps, if the diagram goes bad it will pump fuel straight into the crankcase. Impulse type fuel pumps ,,if the diagram goes bad it will leak fuel back into the crankcase though the impulse line. The carb float sticking is by far the most common and the first thing to be checked.

[jim dailey]

Thanks for the compliment Josh , Maybe some of these other guys can see I do know what I post about !!!! If I dont know I wont post !!!!
Now you can tear into that old carb. and just check it out as I explained, Then you will be ready to do that job in less than a hour should it happen again.

Glad I could Help :cool2:

OK, Restrorob, I have a dollar that says he will call again on how to set the hi and lo on the carb. What do ya think?

[Starman]

Thanks for the compliment Josh , Maybe some of these other guys can see I do know what I post about !!!! If I dont know I wont post !!!!
Now you can tear into that old carb. and just check it out as I explained, Then you will be ready to do that job in less than a hour should it happen again.

Glad I could Help :cool2:
I'm just glad to see u guys step'n up to bat. Been on this site since Dec 04 & it's refreshing to finally see a post about a mechanical pblm. :)

[Restrorob]

Well they must come up here on vacation because I have seen it happen here as well. The new Briggs push mower type engines have the gas and oil both on top and I have seen them get mixed up. And there is another was for gas to get in to the crankcase,,the fuel pump. Cam operated fuel pumps, if the diagram goes bad it will pump fuel straight into the crankcase. Impulse type fuel pumps ,,if the diagram goes bad it will leak fuel back into the crankcase though the impulse line. The carb float sticking is by far the most common and the first thing to be checked.



OK fixer67 All i can tell you is what I haven't seen !!!
Now your fuel pump theory; I will only agree with that to a certain extent.
Think about this one ! How many carbs. have you rebuilt or replaced versus fuel pump replacements.

[Restrorob]

Almost forgot if the diaphragm goes bad how is it gonna pump fuel into the crankcase ? (if its bad it cant pump)

[fixer67]

OK fixer67 All i can tell you is what I haven't seen !!!
Now your fuel pump theory; I will only agree with that to a certain extent.
Think about this one ! How many carbs. have you rebuilt or replaced versus fuel pump replacements.

The fuel pump leaking gas back into the crankcase is no theory but fact, I have seen it happen more than once. It is rare it say the least but it happens. As to how many carbs I have rebuilt I lost count around about 10,000. I have been doing this for over 20 years now. I replace fuel pumps about 2 or 3 times a years or there bouts. We have some real dumb people here bouts and what some of them do is just plain scary. You thank that putting gas in the oil fill is bad how about the man how put a clothes hanger on his trimmer head instand of trimmer line, or the one who would always put the mower blade one upside down and even took it off and put it back on upside down after we put it on right, or the one who would not stop putting K-1 in his generator with a Briggs engine because his dads generator ran on that years ago and he just know this was did to. I can go on and on about the things I have seen done.

[Restrorob]

Hey jim you mite want to keep that dollar in your pocket, That carb. Is fixed jet On the low and hi speed circuits all he's gotta do is set the idle and check no load high r.p.m. which should be 3600 just for the record

[Restrorob]

Fixer67 Thats some good ones, Like I said there is alot I've seen and alot I havn't. I got one for ya ! customer too cheep to buy a replacement air filter for his 3.5 hp briggs walk behind so he walks out in the yard and grabbs up a hand full of moss and packs it in the filter box.There are some good ones !!!!

[fixer67]

Almost forgot if the diaphragm goes bad how is it gonna pump fuel into the crankcase ? (if its bad it cant pump)


That would be true if it the diaphragm went 100% failure all at once. If only a small hole came into the diaphragm it could still pump enough fuel to run the engine and still pump fuel into the crankcase at the same. Fuel being pumped into a crankcase by the fuel pump is rare but does happen. It is more common for it to happen with cam driven fuel pumps but can still happen with impulse type pumps. I even know of one deal where a cam driven fuel pump on a Chevy pumped so much fuel into the crankcase it destroyed the engine and when the oil was drained it was found out to have over 4 gallons of gas in the oil. The car was still being driven right up to the minute the engine locked up. The owner never had a clue as to what was going on. By the way I liked the one about the moss air filter, that is a new one on me. What will people thank up next?

[Restrorob]

Its like you said Fixer67 (SCARY) ;)