Medium
1-2 hours
This is a genuine Hitachi replacement part. The piston is designed by the manufacturer for use in blowers and brushcutters. This part is made of metal, and is used in the cylinder assembly to power the crankshaft. You may require an Allen wrench and pliers when replacing this item. This part is sold individually.
Piston 6698368
OEM part for: Metabo HPT (Hitachi)
Part Number: 6698368
$15.84
In Stock
Ships within 1 business day 
Compatibility
This Piston will fit the following 5 machines. Confirm this part works with your model, and view the detailed model diagrams and repair help we have to offer.
Metabo HPT (Hitachi)
This item works with the following types of products:
- Blower Parts
- Trimmer Parts
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Customer Repair Instructions ?
All our customer repair instructions are solicited directly from other customers just like you who have purchased and replaced this exact part.
Low compression because of stuck piston ring.
RICHARD - July 14, 2023
Tool Type
Blower
Difficulty
Medium
Time
1-2 hours
Tools Used
Screwdriver, Socket set, Nutdriver, Allen wrench, cylinder hone
Replaced piston and piston ring.
The most difficult part was removing and re-installing piston wrist pin.
Very tight.
The most difficult part was removing and re-installing piston wrist pin.
Very tight.
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Would not start.
Richard - September 27, 2018
Tool Type
Blower
Difficulty
Easy
Time
More than 2 hours
Tools Used
Screwdriver, Wrench Set, Allen keys
Upon doing a compression test on this blower I only got a reading of 70 PSI. Replaced the piston, piston ring, piston pin, piston circlips & cylinder packing. After installing these new parts a new compression test was now 145 PSI. Added a little fuel and it started and is running like new. I never did any repairs like this before and found it quite easy to do myself as I paid attention to details.
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Ring seized due to lack of oil
David - June 7, 2016
Tool Type
Blower
Difficulty
Hard
Time
1-2 hours
Tools Used
Screwdriver, Socket set, allen wrench set
Pretty straight forward. Remove plastic casing, fan blade. Remove magneto, muffler, carburator. Remove bolts holding cylinder on and lift cylinder off. Swap the two covers on the cylinder, making sure you remove each and install exactly to the same location and direction as they were installed on the old cylinder. Note the arrow on top of the piston so that you install the new piston correctly. I recommend scribbling a little mark on the engine case to help you remember. Remove snap rings on wrist pin. Drive out wrist pin. This was a little tricky. Emory clothed wrist pin, and clean it up. Install one snap ring in piston. Clean out the small end of connecting rod and put a few drops of oil in the small end of connecting rod. Carefully press in wrist pin with a pair of channel locks, then put a small bolt that has a head smaller than the wrist pin hole and pressed the pin all the way in, up to the snap ring on the opposite side. Install other snap ring. Add a few drops of oil to cylinder and piston ring. Make sure the piston ring is lined up to the alignment pin in the ring grove. Carefully push the cylinder onto the piston. Bolt the cylinder down and assemble everything in reverse order. Use a couple of thicknesses of paper to set gap for magneto.
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Our customer service team are at the ready daily to answer your part and product questions. We have a dedicated staff with decades of collective experience in helping customers just like you purchase parts to repair their products.
All our part reviews are solicited directly from other customers who have purchased this exact part. While we moderate these reviews for profanity, offensive language or personally identifiable information, these reviews are posted exactly as submitted and no alterations are made by our team.
All our customer repair instructions are solicited directly from other customers just like you who have purchased and replaced this exact part. While we moderate these reviews for profanity, offensive language or personally identifiable information, these reviews are posted exactly as submitted and no alterations are made by our team.
Based on data from past customer purchasing behaviors, these parts are most commonly purchased together along with the part you are viewing. These parts may be necessary or helpful to replace to complete your current repair.
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