Backfiring  By  lain (Read 7,843 times)

Not sure how big it is by the image or if it would fit this, this is the dremel I have:

Yep a Dremel the chuck takes 1/8 dimeter inserts Also a dremel makes it's power at high rpms like a 2 stroke and you need something that turns slow but has torque a low rpms. But here is the thing you can buy a Honer and a Drill but why just get a new jug and piston which will about the same in cost.

What about the wire brush hones by flexhone? They look like they can be used on many size cylinders, btw my cylinder is 50mm, 100cc.

I say again - take your jug to a lawnmower repair shop AND ASK THEM FOR A FAVOR.  Given your jug is near new, the work will be very slight - and many people like to help those who are trying to help themselves.  Plus - a good contact for general small engine tips.

If you deglaze:


"The importance of cylinder wall deglazing cannot be overemphasized. The proper cylinder finish will provide the quickest possible break-in and greatly reduce the possibilities of ring or piston scuffing during break-in.

The glazed cylinder wall causes rings to "skate" on the highly polished finish and discourages the minute amount of wear which is necessary to mate piston rings with the bore.

The interrupted "deglazed" finish contains minute hills and valleys which carry a film of oil which will retard which will retard scuffing during break of as well as produce the type of cylinder finish piston rings can mate to very rapidly.

The finish produced by a 220-280 grit stone is most desirable. The cross hatch pattern should intersect at approximately a 450 angle. Too flat an angle leads to ring spinning which prevents seating the rings.

Probably the most critical part of the deglazing operation is the proper cleaning after deglazing. The residue of honing, if left in the engine, will rapidly destroy all moving parts. It is recommended that engines be cleaned thoroughly with soap and water. Clean with soap and water until the bore can be wiped with a clean white cloth without soiling the cloth. After clean up, oil the area to prevent rust formation. Waterless hand soap also serves as an excellent cleaning agent.

CYLINDER WALL GLAZE BREAKERS

This new Deglazer is fast, easy to use a real performer ever under adverse condit1ions. Cylinders can be deglazed and crosshatched in 30 to 45 seconds. Tests made on this tool have proven satisfactory operation up to 14 hours of continual running.




GLAZE BREAKER HONE

Sturdily built deglazing hone breaks the glaze in any cylinder. Flexible drive shaft permits easy access to all cylinders. Cone expansion adjusts hone to cylinder wall with uniform pressure. Adjustable spring tension lets you select desired pressure.

Fits standard 1/4" drill. Cylinder range is 3" to 6", no extensions required.

Supplied with 220 grit stones recommended for quick, positive seating of steel and chrome rings. Replacement stones and pads available."




www.hastingsmfg.com/ServiceTips/cylinder_deglazing.htm

I agree a new gasket set is always a the better way to go . as for the new jug and piston , as long as there are no deep grooves cut into the jug and as long as the piston is still in good shape there is no need what so ever to buy new . a good used cylinder that is honed for new rings is just as good as a new cylinder. Also not everyone has the extra cash to keep buying new big bore kits . I've been in the red for awhile now thanks to Christmas and know what it's like to do what u can with what u got.

Thanks for the detailed description of why honing is important. I will try and find a shop that will help me for free or relatively cheap. There is a shop nearby, but I am confused because it is a "RentalDepot" but its one of the few places that popped up when I searched lawn mower repair in google maps, and the only place I can walk to. Just called them, no answer so I left a message. Hoping they will get back to me soon. 

To get the tools and everything to hone the cylinder would cost more than an entire new BBK, I got my kit for $55. I do not have $55 though, and I probably won't have any money until I fix the scoot. I use the scoot to get around to do freelance gigs, since I haven't been able to ride I haven't been able to work. Public transportation isn't an ideal option either, most of my clients are where public transit does not go. This is why I am trying to get the scoot working properly and trying not to spend any money if possible because I do not have money, I have to borrow money just to get food and crap I need to live... I'm not even in the red anymore I'm so far under that the red looks good now... 

Sure thing