Help: Lawn-Boy 21" SilverPro Series, 10247, DuraForce (2-cycle) behaving badly

[bt3]

Re: Help: Lawn-Boy 21" SilverPro Series, 10247, DuraForce (2-cycle) behaving badly

On the advice of bt3 and others I bought a can of Seafoam even though I thought the claims were "too good to be true". Since I had about a half a tank of gas in the mower and only a quart to quart and half left in my gas can I added 1/2 ounce of Seafoam to the tank and filled it up. Since the temp was around 50 and the mower hadn't been used in almost 2 weeks I had to prime it twice and it started on the first pull after the 2nd priming and ran normally. It was no longer surging and skipping (or whatever it was doing) at medium to high speeds. It's back to running like it did before I did the work on it and I guess I owe it to Seafoam. :smile:

I've had very good luck with Seafoam. And as I said, if nothing else, it's a great fuel stabilizer. A friend of mine who runs a racing production company swears by it. He has it on hand for all his motors, and especially his generators.

Always worth a try. It can free a clog or push out water in you engine.

Glad you are back to where that awesome mower belongs - Running like a champ :thumbsup:

 

[dewguy1999]

Re: Help: Lawn-Boy 21" SilverPro Series, 10247, DuraForce (2-cycle) behaving badly

just wondering I have the same model does yours have the high rear wheels

Nope, the back wheels are larger than those in front, but are not the high rear wheels that are on your Lawn-Boy. Here's a old pic of mine (2007):

I have to shut off the fuel to mine or it leaks out of the air filter and the muffler and it runs like crap till I empty out the carb bowl

If you read this thread from the beginning you'll see that I had the same problem as well as a failing CDI (coil) that were causing me all kinds of grief this summer. Hopefully come spring I'll clean and rebuild the carb to eliminate the fuel leaking caused by a bad needle and seat.

I've had very good luck with Seafoam. And as I said, if nothing else, it's a great fuel stabilizer. A friend of mine who runs a racing production company swears by it. He has it on hand for all his motors, and especially his generators.

Always worth a try. It can free a clog or push out water in you engine.

Glad you are back to where that awesome mower belongs - Running like a champ :thumbsup:

bt3 thanks for recommending Seafoam. As I wrote in another thread, Seafoam having a unlimited shelf life as well as providing up to 2 years of stability is a big selling point that I don't think many people are aware of and instead use Sta-bil which doesn't have a unlimited shelf life. The net is full of debate as to whether or not fuel additives actually do something or are just snake oil, in my case I bought it to act as a stabilizer and if it did the other things it claims then that was just a "cherry on top" and as it turned out it did help with my running problem, so I'm a happy camper.

Looks like next week I'll do the last mowing of the season and then put it into storage for what I'm hoping won't be a long, cold Michigan winter with lots of snow like last year.

 

[guitardude1998]

Re: Help: Lawn-Boy 21" SilverPro Series, 10247, DuraForce (2-cycle) behaving badly

turfboy could that be the issue with mine I have the same mower and if I don't shut off the gas valve it floods the carb and runs like its on low speed constantly till I empty and clean the carb

 

[primerbulb120]

Re: Help: Lawn-Boy 21" SilverPro Series, 10247, DuraForce (2-cycle) behaving badly

You might want to replace the carburetor altogether, in which case the part number is 107-4607. Look for it on Amazon.com or on eBay. If you can't find it there it is available for sale at jackssmallengines.com.