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Hello, I have had 3 different mowers with decks just like yours except not so dark green. I am guessing that yours is early eighties. A pre compliant mower, blade control handle I think they made the f-100's from 1978 to 1982. Then they started putting metal walbro carbs on a lot of F engines...

I have worked on several duraforce mowers and I have a problem with the air vanes sticking and the mower revving too fast. The air vane works free until I tighten the two bolts that hold the carb on and that seems to put the air vane shaft in a bind and it won't spring back. This has happened on...

Hello, The primer hose connects to the top right side of the carb if you are standing at the back of the mower. The little tube inlet goes straight up and down vertically. It is just inboard of the gas line tube connection that is horizontal. So if you get down mower level and look at where the...

NO GO , wont fire up.

yes, correct primer bulb.

Switch was bad. Swapped it out with another switch from a running mower and it took right off. A new kill switch is on its way. It helps to have extra mowers setting around. Jerry

It is good to see someone else interested in the old 2 strokes. A lot of people either love lawn boys or they hate them. I know several people that needed a push mower and I offered to give them a lawn boy and they were not interested because they had to mix the oil and the gas. I believe your...

I have an extra engine (short block) from a 1987 steel deck that rusted out. I honed it out and put new rings in it and just let it set for 3 or 4 years. I just put all the other engine parts from the 7229 (1979) together and am hoping it will run ok. The only thing I need is an exhaust gasket...

I think if they are in good shape and do run good $150 is not a bad price. If I remember right these two mowers are almost like twins. They both have F engines and self-propelled. I enjoy keeping older Lawn Boys going. Parts are getting more expensive and a little harder to find but there are...

I'll read this. Thank you Mark Jerry

I am trying to get a IH model 3311 from about 1973 to run. It has Lawn Boy D600 engine. Everything looks good. Coil checks out, spark plug is sparking, it is getting gas. Cleaned carb, kill switch is connected, took flywheel off and governor system looks in order. I am going to take the blade...

Well I think I answered my question myself. The short block or the basic part of the engines look to be the same. I think the differences seem to be the shut off system, or kill switch and the brake stop, and the throttle controls. Things were a lot simpler before before the government rule...

Does anyone know the difference between the 78 to 82 F100 engines and the later 80's F engines besides the type of carbs they use? The F100's do take a different coil than the newer F models. A friend brought me a model 7229 to work on and said it wouldn't start. It was getting spark and gas. It...

Hello, I looked up your model on the toro master parts list web page and it says the recoil assembly is part no. 99-6713. They are all discontinued. I needed one last year and couldn't find one. Then one appeared on ebay 2 or 3 months later. There might be superceeded numbers that are different...

Welcome to the forum. Yes I think you need that U pipe for the exhaust to go out the muffler up top. The exhaust goes out the bottom of the engine through the exhaust ports and goes down and then back up through the deck into the muffler. I have had that plate off of several duraforce mowers...

I get a lot of parts from ebay that are discontinued from Lawn Boy or Toro. But the Toro master parts lookup page is the best place to find your part numbers. Thanks Rivets. I used to have that list on my old computer but lost it somehow. That is a handy list. Regards. Jerry

Did you ever get the shroud off?

Hello, It will probably be hard to find a replacement. It is lawn boy part 681709 and it has been discontinued for years. I looked online and couldn't find one anywhere. Model 7025 wasn't a very popular model. I have never seen one in person, only pictures. Someone on this forum might have an...

Are you talking about the black shroud under the gas tank shroud and below the pull starter? If I remember right there are 4 bolts holding it on. I think it is to direct the air from the flywheel down around the cooling fins. Regards Jerry

Hello, I have good luck stopping them from surging by replacing the jet on the side of the carb with a briggs and stratton pilot jet, part # 801308. Sometimes it's under a sticker or piece of black tape. That lets it get a little more gas. The smoking could be an accumulation of oil from the...

Thank you sir. Regards Jerry

Does anyone know the correct spark plug for a duraforce engine? It has an autolite 458 in it but it is not sparking. I normally use champion. Thank you. Jerry

My serial # is 156596H or actually that's the spec #. There isn't a serial number listed on the sticker. Yes, according to Jack's Small Engine search that would be the right head gasket. Does the head need to come off to the adjust the valves? I'm a Lawn Boy guy and mostly tinker with 2 strokes...

Well I installed the rebuilt Tecumseh carb and didn't help a bit. Still surges. But it runs pretty good on half choke. Too bad they don't have any adjustment screws to help with the mixture. It might run ok on half choke. I will just have to try it out if we ever get enough snow. Jerry

Ok , thank you. Another thing is that since it is dark already outside there is white flame coming out of the muffler. I thought that was strange. The muffler has one of its mounting bolts missing but is still tight and flame comes out that bolt hole too. I am going to swap out carbs and see...

I don't how to take pictures and post them. I don't even have a cell phone. It does run better on half choke than on open choke. My friend says he has the original carb and it has been rebuilt. This one has been running good for the last 5 years but it doesn't get used much. Maybe I'll try...

Ok, I took the carb back off and the float did tip down quite a bit on the opposite side of the pin. I bent the little tab that the big end of the needle sets on. now it is level. I found out that this is not the original carb. This one has a metal emulsion tube and also a metal seat, kind of...

Ok Thanks Rivets. I think I do have a new needle and seat. I did clean out the holes in that idle jet with a wire and carb cleaner and blew it out with compressed air. The only thing I didn't take out was the plastic emulsion tube with the little rubber o rings. I don't know if this could be...

Hi guys. I went to start my churches' snowblower and it wouldn't start by hand. I forgot that it had a fuel shutoff. It did start with an extension cord, but the rpm's surged up and down. I took it home and cleaned the carburetor and I thought that might help but it that didn't help at all. It...

Thank you. I think the problem was the metal float. It had some gas in it so it was too heavy to shut the gas off. I replaced it with a plastic float and it stopped leaking, but now it wont start. I got frustrated with it and put it away for awhile. I will get it back out again one of these days...

Hi guys. I have an old MTD 21 inch snowblower with a 2 stroke Tecumseh engine model HSK 600. I was putting some fresh gas in it and gas started dripping from the carburetor. I thought maybe the float was stuck down and was running out of the air intake at first. But when I tipped it up to get a...

Thank you, thats good to know.

Thank you. I have had this one a long time and it has been a good one. I put a new carb on it once and new rings. I was just curious about how old it was. Thanks again. Jerry

Does anyone know when FS 76 trimmers were made.

Hey Fuzzy, You can get repo decals that look real good on ebay. The seller is graveyardmowerz. He has a website also graveyardmowerz.com I have bought decals and NOS parts from him. I believe he is Florida. I have been pleased with everything I have gotten from there. Jerry

I had the same thing happen to me. Found out that the end of the throttle spring came loose from the plastic cable linkage that slides back forth above your air cleaner box. FuzzyDriver posted a link to a youtube video about this issue on my thread about no throttle response, just 2 threads down...

Right On

Well, so much for easy fixes. I was ready to give this mower back to its owner, so I started it to make sure it was running right. I mowed 2 strips across my yard and let go of the brake bail handle and the thing kept right on running. I thought not this again. The only other thing I could think...

The V engines I think might stand for value. They were sold in the nineties at box stores. They had black shrouds, black handles and steel decks, with plastic carbs. I believe the air filters and boxes were the same size as on F engines. The ones I have seen were 4.75 hp and 2 stroke. I googled...

I ordered a new toro carburetor yesterday morning on Amazon that came from Jack's small engines in Md. and it got here today. Now that's fast. So I assembled all the parts and installed it on this problem child. I also checked the compression and it was 90 psi. I'm not sure were it should be...

Sorry, I couldn't find any filter boxes, but on ebay there is an air box #612504 black for $14.99. I couldn't find a 611377 but if google part # 931231 several places have them. That's the one you were talking about that is black and has the 2 slots in the front. I have a cover like that on a V...

Do you know what the model no. is of the mower or the part no.s of the air box and cover? Steel deck or alloy ? I have seen black air boxes and green covers on Ebay lately. I have 4 or 5 F mowers around but I don't think I have any extra air filter covers, but I will look. Regards, Jerry

Hello I'm not sure what air valve you are talking about. It does have all 3 gaskets that go on a dura force carb. My problem might be that it is a cheap Chinese carb. Ebay is loaded with them. Used to be that you could only get the oem ones that came unassembled. You have to put each piece...

Dura force engines seem prone to having a lot of gas seeping into the crankcase and dripping oil out the muffler and out of the plate on the bottom that holds the exhaust u pipe in. They don't have any adjustment screws on the carb, but they do have a primer bulb. A friend brought me a dura...

No, Dura force engines don't come with shut off valves like the F engines do. It should be the right spring because it came with the new carb. I asked the question about if there was a difference between the throttle spring on a F engine and the dura force on this forum awhile back but I don't...

I went out today and started the mower and let it run for a few minutes and let go of the bail and it shut right off. So I restarted it about three more times and it stopped right away every time. It was so weird, just like it was a different mower. This sure beats having to pull the spark plug...

I checked the spring on the air vane and it came loose from the throttle cable linkage. Just the opposite end of the spring that came loose in the video. I also have an add on shutoff valve. on this mower but very rarely use it, but I will now. Thank you for your reply. I don't know how that...

I have a Lawn Boy duraforce gold model 10525 that I put a new carb on. I hadn't used it in a long time and I noticed the tank was empty. There was black oil all over the deck that was coming out of the muffler. Very little oil was under the carburetor. I checked the carb and the float, needle...

I have a duraforce easy stride mower model10550 that keeps running when I let go of the bail brake handle. I can't figure it out. I looked at a duraforce repair manual and it shows an open circuit to run. Closed circuit to shut off. When I let go of the handle the spring pulls back and make...

Does anyone know if the throttle spring for an F engine will work on a Duraforce engine carb? I am talking about the little spring that provides tension on the white air vane governor. They have different part numbers but look the same in the diagrams. The F engine is # 613142 and the Duraforce...