New Piston and rings for two stroke. - Snowblower Forum : Snow Blower Forums
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post #1 of 43 Old 02-24-2015, 04:19 PM Thread Starter
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New Piston and rings for two stroke.

Has anyone "re-ringed" a two stroke Briggs R-Tek engine here ? It's from a Toro CCR3650. I can't seem to dig up any info on this except that the cylinder walls should be honed with a ball-hone of the proper size only to refresh the surface for the new rings to wear into (obviously remove slight scoring that happened with a cross hatch) and this should be done very carefully with motor oil as the lube.

Should I use two stroke oil as the lube for the ball-hone, or regular stuff ?

I'm thinking 2-stroke but not sure on this one. All I know about it is that it has lower ash content that's about it. I know the ports need to be carefully passed of as to creat as little damage as possible.

My piston had some scoring, the cylinder walls were cast iron thet looked better but not perfect. I bought a fresh original Briggs piston, it came with new rings, and wrist-pin, and clips for the wrist-pin. I am aware of the orientation of the rings as there were instructions in the box. Also read online about coating everything as it's installed, rings, pins, piston, ect. with two-stroke oil during assembly.

I have not begun yet, it's cold in the garage, but Saturday I'm going to blow some heat in there and get started.

I would like and appreciate ANY and all insight that anyone in-the-know can offer , tips, ect as I have never done this before and I am not pretending to know how, I only mentioned what I have read and seen on YouTube on the two stroke vids (some were yamaha 2-stroke MC rebuild vids) and one web site that offered a little, but it was vague.

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post #2 of 43 Old 02-24-2015, 05:50 PM
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ive done a few two stroke snowmobile engines with the ball hone. lotsa oil of any kind pretty much and dont go too crazy with it. wash it out really good after your done and reassemble it all with oil coated parts

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post #3 of 43 Old 02-24-2015, 06:30 PM Thread Starter
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ive done a few two stroke snowmobile engines with the ball hone. lotsa oil of any kind pretty much and dont go too crazy with it. wash it out really good after your done and reassemble it all with oil coated parts
Thanks I will do that. I have not got the ball-hone yet, have to order it tonight. The piston itself between the top and the rings slots measures 2.485" so I need to research which exact ball hone to purchase. Any insight would be helpful

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post #4 of 43 Old 02-24-2015, 06:36 PM
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I don't know if they have hones, but check the local auto parts stores for the tool loaner programs. Pay a deposit to get the tool and then take it back within 90 days for a refund.

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post #5 of 43 Old 02-24-2015, 06:57 PM
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Quote:
Originally Posted by Pathfinder13 View Post
Thanks I will do that. I have not got the ball-hone yet, have to order it tonight. The piston itself between the top and the rings slots measures 2.485" so I need to research which exact ball hone to purchase. Any insight would be helpful
If the bore is not chewed up the berry hone works well.


Here is a link to Engine Repair site that discusses the honing process.
Engine Cylinder Hone

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post #6 of 43 Old 02-24-2015, 07:02 PM Thread Starter
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I don't know if they have hones, but check the local auto parts stores for the tool loaner programs. Pay a deposit to get the tool and then take it back within 90 days for a refund.
I looked into this last week, they don't as the tools wear with use. Advance Auto told me this. Ebay has them for cheap enough, just have to decide the exact size / grit to purchase.

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post #7 of 43 Old 02-24-2015, 07:28 PM
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I looked into this last week, they don't as the tools wear with use. Advance Auto told me this. Ebay has them for cheap enough, just have to decide the exact size / grit to purchase.
Here you go... video and oil recommendation.
Technical information on using engine hones, flex-hones, ball hones

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post #8 of 43 Old 02-24-2015, 07:49 PM Thread Starter
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Here you go... video and oil recommendation.
Technical information on using engine hones, flex-hones, ball hones
Thank you, I will watch this late tonight after work, and look at the details. Much appreciated !

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post #9 of 43 Old 02-24-2015, 08:51 PM
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Here is a LINK to the Briggs two stroke service manual, if you don't already have it. Good luck with the rebuild.
Another LINK just in case.

Toro 8/24 (38080) 1989
Toro 721-QZR (38743) 2015 (Hemi Predator Power)
Toro (51984) Hand Held Blower (For the light stuff)

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Last edited by Grunt; 02-24-2015 at 08:54 PM.
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post #10 of 43 Old 02-24-2015, 08:57 PM
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Good luck Path!
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