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Old 10 March 2022, 12:49   #1
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Country: UK - N Ireland
Town: Co. Antrim
Length: 10m +
Engine: Yamaha 422
Join Date: Apr 2015
Posts: 23
Yamaha Hydra drive valve body repair

Has your hydra drive distributor valve body failed due to a worn sleeve?
We can replace the worn sleeve/ bush with a precision ground item made from heat treated D2 steel. 45 - 50 HRc. Please note this is not a diy replacement as specialist equipment is needed to remove old sleeve.
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Old 10 March 2022, 13:39   #2
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Country: UK - Scotland
Town: north ayrshire
Boat name: charlie girl
Make: S/R5.4/regal3760
Length: 10m +
Engine: Suzukidf70 2x6lp 315
Join Date: Jul 2009
Posts: 3,986
Are you doing service exchange? I might have a couple of old units lying about might be of use to you. Would need to have a dig around but there was a couple message me if there any use seems a common issue

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Old 10 March 2022, 17:24   #3
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Country: UK - N Ireland
Town: Co. Antrim
Length: 10m +
Engine: Yamaha 422
Join Date: Apr 2015
Posts: 23
Hi Ken

It wont be exchange as I have no units left. It also depends on the condition of the pump. Over the years many legs were scrapped for this fault as the block is in the region of £2k. This is a recent development with one in service since the end of last year. I am using a harder sleeve as the original seems to just be mild steel and wears before the rings. Easier to change the rings than the sleeve.
If you have any complete blocks let me know.
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Old 11 March 2022, 17:16   #4
Member
 
Country: UK - Scotland
Town: north ayrshire
Boat name: charlie girl
Make: S/R5.4/regal3760
Length: 10m +
Engine: Suzukidf70 2x6lp 315
Join Date: Jul 2009
Posts: 3,986
Theres one here if you want it seems to be the complete upper in kit form Plus another empty upper case & looks like the internals of a single prop lower too

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