Engine Rebuild

[bill18163]

I had a post started on the old board about work I was doing on a string trimmer with a Kawasaki engine. I started it back around the beginning of December last year. I had been waiting for the rings to come in from where I ordered them. I got the rings and they are not the right ones. They are too big in diameter. I used a parts diagram provided to me by TMC Power Equipment who is the seller(through dealers) of the trimmer. The parts diagram they gave me is KPW3300 with an engine reference TD33DX-310852C. The part number for the rings in the blow out is TD33026 and is a TMC Power Equip number. They provide cross reference numbers on their site and the cross ref number for that part is 13008-6045. I checked to make sure that the correct part was shipped to me and not another one by mistake. The part I ordered per this part list was correct but like I mentioned above they are too big.They are 41.5mm dia and my piston bore is 37mm(1.4575"). Piston dia is 36.98mm(1.4555"). This machine is 24 years old and obviously that part list is not for my machine. It is very similar and everything looks like my machine but some things obviously are not. So, is it possible to use the dimensions for the bore and the piston that I provided above to find a set of rings that will work? I have an old "Small Air-Cooled Engine 1990-2000" service manual 2nd edition that was on my book shelf and bore and piston measurments are identical to a "Robin" engine(EC03ER) in the book for what that is worth. If more info is needed let me know. Thanks.

[Skywatcher]

Hi Bill

Laser Sales sells individual two cycle piston rings to fit bores from 36 mm to 58 mm. Rings are all 1.5 mm thick with notched ends for the locating pin in the ring groove. Part number for the 37 mm ring is 44200. Hope this gives you something to work with. All the best,

Sky

[Deere2me]

Since you chose to ignore this: viewtopic.php?f=3&t=11, all I can tell ya is you need to know the old rings thickness as well as the width/depth. Also the cross section profile, some have a bevel, some stepped, etc. In a more critical application, ya also wanna know the material, as well as chromed, moly, etc.

But the bigger question would have to be: why ya even messin with a 24 YO throw away unit? Toss it!

[bill18163]

Deere2Me,
As I mentioned above, I started this thread back at the beginning of December of last year on the old board. I guess it was just a mistake on my part that members might go back and reference the past posts where there is info that you mention I omitted. To your question about why don't I just toss it because it's 24 years old? Well I'm 70 years old,retired,and I like to tinker with things mechanical. I have never worked on an engine like this and I thought it would be an interesting project to work on this winter to pass the time. If I can restore the machine to good working order that will be an accomplishment for me plus I will have a good brush cutter to use. Just guessing but I bet you are relatively young(compared to me)and mostly in a hurry with things. At my age I'm not in much of a hurry with anything any more. I just had an after thought! I hope nobody is thinking about tossing me out because I'm too old!


Skywatcher,
Thanks for the tip on checking out Laser Sales. I'll check them out. We have one of their stores here in town.

[StarTech]

Since you chose to ignore this: viewtopic.php?f=3&t=11, all I can tell ya is you need to know the old rings thickness as well as the width/depth. Also the cross section profile, some have a bevel, some stepped, etc. In a more critical application, ya also wanna know the material, as well as chromed, moly, etc.

But the bigger question would have to be: why ya even messin with a 24 YO throw away unit? Toss it!

First Deere@me he did gave us his numbers as provide by his dealer>

KPW3300 with an engine reference TD33DX-310852C

. And his equipment numbers are Model is TD33DX(BC330-DX) and SN is 506332. Engine number is 146859(Kawasaki). It is the same info we got from Perr site where he originally posted. Another set of number he wrote down years earlier was TD033D-AC04. The main problem here is that TMC is the only source for the info on this trimmer and it probably was specially made for them with model numbers unique to them.

Second I have repaired several 2Cs as old as 50+ years lately. Some collectors just like to have them running to show at gatherings. I currently working on restoring a Husky 37 which is just about complete once I get that oil pump drive drive off. It can not be pried off as it is diecast and will break. The gear itself is in good condition; just got to replace that crank seal behind it.

[bgsengine]

Deere2Me,
As I mentioned above, I started this thread back at the beginning of December of last year on the old board. I guess it was just a mistake on my part that members might go back and reference the past posts where there is info that you mention I omitted.

Correct. You may be retired and have time on your hands, many of the professionals that hangout here do not have the luxury (or the incentive) to go back to the old board and dig up a mysterious post that we may or may not find on a search - so it would be helpful to post a synopsis, and reference link to the post in question, if not posting all the numbers and info that can be had.

To your question about why don't I just toss it because it's 24 years old? Well I'm 70 years old,retired,and I like to tinker with things mechanical. I have never worked on an engine like this and I thought it would be an interesting project to work on this winter to pass the time. If I can restore the machine to good working order that will be an accomplishment for me plus I will have a good brush cutter to use.

That is always a good reason. - But again it would be helpful to mention that - make the distinction between something that you NEED to get fixed, and something you're just tinkering around with.. Since we're not "there", it's guesswork otherwise whether we should advise to "toss it, it's so old you'll never find parts." or "Well, it may take you months to find the right parts and a whole bunch of "Take a guess and order it in to see if it fits" parts that you end up having on the shelf with no use..

Just guessing but I bet you are relatively young(compared to me)and mostly in a hurry with things. At my age I'm not in much of a hurry with anything any more. I just had an after thought! I hope nobody is thinking about tossing me out because I'm too old!

No such thing as too old.

[Deere2me]

Well starfire1, " as provided by his dealer" apparently ain't worth a chit. huh? So you went and did his bidding for him, good fer you. I'm not inclined to go lookin' or askin' fer unit numbers if the OP chooses to not supply them! It don't work like that! I/we spend enough time looking things up etc. for the posters who have the courtesy to post their numbers as requested.
And, I might add, it would appear that I was the only one that directly answered the guy's question ( you Do remember the question, right? ): " If more info is needed let me know"

Through all this , the guy STILL hasn't posted his unit numbers............sheesh!!

As you well know bill18163, you're not the first person to ask a question without posting his equipment/ engine numbers, and you sure ain't gonna be the last!

And bill, may I call you bill?.... I hate to break it to ya bud, but at your age, if you went into the hospital needing a heart/lung transplant, it's a good bet ya ain't comin' out!!! How's that song go ? " You can checkout anytime you want...but you can never leave!

[KE4AVB]

Bill, The part number you listed does appear to be correct for the 37mm piston rings.

If you don't feel that they are right you can try this piston and ring kit. Which is the 37mm piston set.
http://www.dlastore.com/e_store/engine-parts/piston-kits/kawasaki/piston-kit-fit-kawasaki-td33-td-33-37mm-130012069.html

[Deere2me]

That same place has the rings only, for like ten bucks. A deal at twice the price!

[bill18163]

Guys,
Thank you all for helping me out. In the future I'll try to be more precise in providing information.