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Does this have the electrical shutoff on the bottom of the carb if so I would suggest making sure the wires are getting power if they are there must be a way to check to make sure the shutoff is functioning properly I had the same problem finally replaced the electric shutoff with another and it...

January 2014 Craftsman YT3000, 21HP, 46" cut, Model 91728852, engine B&S Platinum 331977. I posted about this problem before but have carried on using the mower after all I am not going to be able to sell it with a bad transaxle, I would just have to scrap it. Interesting thing happened it will...

I had the same problems on a 22hp Briggs engine I would replace the head gasket and it kept on blowing after just a short amount of use, I came on here and was suggested to make sure the head was flat by testing with a straight edge and using a piece of glass and sanding it I got some 240 grit...

If that is true about headbolts not stretching why do all automobile manufacturers in the workshop manual say to replace all headbolts on aluminum heads and even on some other uses where aluminum parts are used. I remember back in the 1960's that when taking the head of an all aluminum engine...

You might want to check the oil in the crankcase pull the dipstick out and smell it if it smells like gasoline change the oil and filter and put a cut off valve on the fuel line I had just that problem and still have a brand new carb leaking fuel into the crankcase if I don't turn the fuel off.

I haven't read all the replies you got on here but if it is really cold where you are and the mower is not kept in a shed or garage you might want to pull the fuel line and drain the tank then check to see if there is ice in the bottom of the tank or lines, it sounds like the mower started on...

I have a Craftsman YT3000 mod.no. 917.288525. My transmission has gradually stopped pulling it started after I had mowed a few hours in summer heat when I got on very slight grade it stopped pulling that was the start of my problems, now it has got where I cannot move in reverse and makes a...

Thank you I will check that out

Bought new January 2014 Craftsman YT3000, 21HP, 46" cut, Model 91728852, engine B&S Platinum 331977. I have had alot of trouble with this mower from new one thing after another earlier this year it was the engine. This started the last couple of times I mowed I went to use it to pick up leaves...

you can remove the inner bearing seals and waste a pound of grease filling the shaft up by pumping grease in it

Bertsmobile, thanks for the information that scenario was what made me start to look to a blown head gasket at the beginning of this year long problem with this engine, fuel in the oil was then so bad I had to drain oil out to do the checks for the blown head gasket. I would like to find out how...

Hi thanks for your reply, the brass filter is still in place the oil was coming out of the unused fittings that pump has never been attached to anything other than the dipstick tube unless the fittings were blown undone when the first head gasket blew they did pour oil out back then and the oil...

Okay thanks I wondered what it was supposed to do I saw there was a fuel pump listed in Briggs and Stratton parts listing but no pictures I wondered why the tubes on it didn't go anywhere, what I don't understand is why it was there in the first place I bought this mower new from Sears. Thanks...

yes there is a breather system that attaches to the dipstick tube. I took the plastic engine shroud of and also took of the tappet cover when that came loose alot of oil poured out it smelt strongly of gasoline, I previously replaced the carb the last time I changed the head gasket. SLOMO you...

Thanks for the suggestion the oil filter is tight there is a breather with small tubes attached to the plastic engine shroud at the rear the down facing tube from that was spraying oil onto the mowing deck. The mower sprayed oil out of the exhaust I don't know if the oil had drained from the...

Hi the oil is barely showing on the dipstick and the spark plug is looking good it isn't fouled at all. Thank you for your suggestions someone here suggested taking it apart to see if the rings had broken causing pressure in the crankcase my problem with that is I am not only 71 yrs of age but...

Craftsman 21HP 46" cut, Model 91728852, engine B&S Platinum 331977 I have written about this mower before, I just don't know what to do anymore I went out to use the mower this afternoon and there was thick smoke coming out of the exhaust and it kept on stopping so I continued restarting it and...

Okay I feel like such an idiot, after being so careful about how I replaced the head gasket. By the time I replaced the carburetor I was in alot of pain in my back and just replaced it without paying attention to what I was doing and didn't connect the relay wire at the bottom of the carb. When...

The head is at the correct top dead center I just checked and am enclosing a picture I also rechecked the clearances on the tappets and they are correct as for the carburetor I am going to pull the one of the MTD being as its running okay and try it on the Craftsman I bought two carbs at the...

I already thought of carburetor and after it started the first time only running on the choke was when I changed out the carburetor for a new one and it made no difference I then cleaned out the tank and replaced the fuel lines. I set the valve clearances just as you described above I am going...

I have replaced three head gaskets the one I just put on is a solid copper gasket I made sure the head is flat by sanding on a sheet of glass sitting on the bed of my table saw to make sure I was sanding on a true flat surface and kept checking it with a machinists straight edge. Now the engine...

Thanks for the link thats a really useful manual

Sorry I forgot to put on there it is the engine that is prone to blowing head gaskets and it is a Platinum 21 HP engine I bought it beginning of 2014 its been a lemon ever since I bought it Sears sent a mechanic to my house three times to fix things that broke within the first 90 days each time...

I own a Craftsman YT3000 riding mower numbers on valve cover is 331977 0010 G1 130502ZD That keeps blowing head gaskets I am in process of replacing head gasket for the fourth time. I tried gluing 120 grit wet and dry to a piece of glass I put that on my table saw bed to make sure it was on a...

How did you shave the head? I have tried gluing emery paper to a piece of glass and putting it on my table saw bed to make sure its on a flat surface but the outer edge so to speak is what I am sanding its almost as if it is growing where I am sanding replacing the head is not possible I just...

I have the problem with a leaky carb as well on a mower I changed the head gasket on it drained almost the entire tank but mainly out on the floor. To check for the head gasket I found that taking the dipstick out while running if the head gasket is blown air mixed with oil will spray out of...

try taking the dipstick out of the engine when its running and if it is blowing air and spatters of oil out of there the head gasket is blown I know because I have two mowers with B&S engines both have blown the head gasket and one of them keep on blowing the head gasket same thing everytime...