Author Topic: Tanaka ---Happy and Sad  (Read 843 times)

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Offline Giles

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Re: Tanaka ---Happy and Sad
« Reply #20 on: April 02, 2015, 03:43:39 pm »
I recently bought another Tanaka ECV 4501 that would not run. The chainsaw had about 130# of compression and I did get it to run after cleaning the carb.
I might add that it ran really good but I had already discovered that it had a (not so good looking) piston. I took the cylinder off and saw that there was some scoring of the piston but the cylinder cleaned up like new.
While searching for a piston, I discovered that many hobby shops carry a replacement piston that is used in some ---(airplane/boats)-- or something, and it is for a Fuji IMVAC engine.
When I received the piston, I discovered it was an exact match but had a dome that was polished really good, and it was marked Hitachi.
I have no idea what other engine parts would be the same ---might be that they adapted basically the same engine for this sports application.

Offline 660magnum

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Re: Tanaka ---Happy and Sad
« Reply #21 on: April 02, 2015, 04:48:09 pm »
The Fuji/IMVAC line of model airplane/boat engines as a brand name have not been supported in the USA in 12 years.  Maybe they were actually made by Hitachi?

The Stihl 27.2cc weed whacker engine can use a Zenoah 26cc piston and they are not related. So I suppose it is coincidence?
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Offline Giles

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Re: Tanaka ---Happy and Sad
« Reply #22 on: April 02, 2015, 05:34:39 pm »
Possibility, but I found the piston with a Tanaka part number search.  I think it was cross-referenced though. 

 

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