Hi, i need to find a new piston & rings & gudgeon pin for my Tanaka ecv 4501 43cc chainsaw, i have the part numbers & have emailed a few possible sites but know one seems interested in helping as i have had no replies? any chance you could help out somehow?? Thanks, Rob..
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Re: Tanaka chainsaw piston probs
The downloadable parts document contains illustrated drawings, part numbers, and descriptions soyou can quickly identify the Tanaka chain saw part you need. To order,go to their dealer locator and contact your nearest dealer. If your local dealer does not have the part you need, call 1-888-4TANAKA.
THIS site has the full piston set for the ECV4501 model for $31. (You will have to scroll down towards the middle of the page)..You can call them at 1-864-306-2734 or send an email to firstname.lastname@example.org
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3. Or, you can call us at 1-888-482-6252 and place your parts order.
Our downloadable Tanaka parts books contain illustrated drawings, part numbers, and descriptions so you can quickly identify Tanaka outboard motor parts, Tanaka trimmer parts, Tanaka or BladeZ powerboard parts, and much more. Make sure to download a free copy of Adobe Acrobat Reader to view the Tanaka parts manual. To save a parts manual to disk either use the Save function in Acrobat Reader 4.0 and up, or "Right-Click" on the link and choose "Save Target As." To view a parts book, click on the link.
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To replace the cylinder and piston is fairly straight forward. Take off the bar and machine top cover and starter pull cover. Remove the handle by removing the black plugs and undoing the anti-vibe springs. Remove the choke and throttle linkages and carb. Remove the exhaust and ignition module. Remove the 'E' clip, washer, clutch drum and roller bearing. The whole cylinder unit will now come out of the unit with a bit of fiddling to get the inlet manifold out. Remove the plastic ring and inlet manifold. Then undo the base of the cylinder unit and carefully pull out the crank and piston. Clean the top of the piston to understand which way round the piston has been fitted, There should be a little arrow showing the direction on top of the piston. The new one will have to go in the same way. With long nose pliers take out one of the spring clips holding the gudgeon pin in place and remove the pin to release the piston.
Refitting is a case of putting everything back in the reverse order. Be careful when refitting the inlet manifold to the cylinder as the small breather piece on the cylinder side must fit into the small hole in the cylinder block below the inlet manifold. If the manifold is more than a couple of years old it will probably be stiff and will need to be replaced!
I strongly suggest that as you take the thing apart you make careful not of what went where so you can refit it to the same location. Also when fitting the new piston into the cylinder lubricate it with oil to make it easier.
the head and cylinder is on piece and is bolted to the crank case by 4 screws. the crank case will be held together by screws . undo these and pull the two shells apart. The gudgeon pin (piston pin)held in with two small c clips.
There are 2 circlips (1 on either side that need to be removed first. Then you can either use the special tool available in most tool shops or a bolt and 2 washers and piece of pipe, one washer must be smaller than the outside diameter of the gudgeon pin and the other must be bigger than the pipe. The pipe must have an inside diameter that allows the gudgoen to be pulled through it. You slide the bolt through the large washer then the pipe and then the gudgeon pin hole, then the small washer and then put a nut on the bolt that is slightly smaller thann the washer so it doesn't score the piston as you wind it and the gudgeon pin through the piston and into the pipe.
It seems you have worn rings and/or barrel and piston. You will have to get the barrel off the engine to ispect. Unbolt the carb and exhaust from the engine. Unbolt the 4 nuts on top of the head. Remove the head and barrel from the engine. Inspect the piston for scoring and wear. Remove the piston by removing the circlip next to the gudgeon pin. Do not drop the clip into the engine.(stuff some clean rags in the engine under the piston. The gudgeon pin can now be pushed out of the piston and the piston removed.Have the barrel and piston measured for wear. If you're on a tight budget you can replace rings only but this is a penny wise pound foolish solution. You'll have the same problem in 2 months time. It is best to rebore the barrel and fit an oversize piston and new rings. The barrel can also be resleeved but this is a more costly option and should only be exersized if you cannot obtain an oversize piston.
a top end kit consits of a 1x piston 2x circlips 1x gudgeon pin 1x set of rings and 1x gasket set basically you take the carb off take the exhaust off take spark plug cap off undo bolts on head/barrel remove gasket slide the barrel off removing bottom gasket then take the circlips off 1 side then push the pin through i put a piecwe of card bord or rag in the crank to stop **** falling down through when you slide the pin out the piston will come out then you will see a bearing in the con rod leave that in there then get new piston put ciclips in one side then get the gudgeon pin put some oil on it and put it in place of the little bearing the push the pin through and put the circlip in and then put the rings on then in the ring gap you will see a little pin the gap in the ring goes in beetween that little gap then you put the base gasket on then inspect the barrel if there is dips in the lining re hone it or get some glass paper and rub it till its smooth but not too much or it will rub down to much then rub some oil in the barrel then put the barrel over the piston and compress the rings and slot the barrel down the pistonand put head gasket on and put head on and tighten bolts/nuts then replace carb good luck