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Old 24 July 2009, 15:43   #1
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Yamaha Trim Tilt Cylinder Oil Leak

Hi All,

My 2001 F115's trim/tilt cylinder is leaking oil and the oil itself seems to have been contaminated (turned whitish). I obviously presumed that the end seals (O-Ring & Dust Seal) would require replacement and the system will need to be bled and filled with fresh fluid.

When I checked with the Yamaha dealer here, he gave me a quote that included replacement of the Piston Sub Assy. When I checked with him on that, he said that the end cap is very difficult to open in old engines and the entire piston sub assy would require replacement.

Have any of you had a similar experience and what is the procedure for removal of the subject assy. Also, do you have to remove the assy to bleed the system and re-fill oil?
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Old 25 July 2009, 19:17   #2
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anybody??
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Old 26 July 2009, 00:12   #3
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Might try posting here (you'll probably have to register):
http://www.thehulltruth.com/shipyard...gine-parts-22/

Andy's pretty good with Yamaha's (as are others, I'm sure.)

jky
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Old 26 July 2009, 04:16   #4
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rubbish, just put a new seal kit in, each cap and seal are about 120 if i remember, they are tight but keep at it
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Old 29 July 2009, 15:17   #5
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Update

Thanks for the encouraging replies!

I managed to get the Tilt cylinder opened in a workshop (didn't have the tools with me). Took the Oil Seal and O-Ring samples and took them to anotherworkshop that makes seals, O-Rings etc. given the correct dimensions. The quality etc. was as per the original seal.

Have got the new seal/O-rings fitted in the cap. Will take it back to the workshop tomm and see if the seals hold the pressure.

Will also post some pictures as soon as I get a chance to.

Unfortunately flushing the old oil out of the F115 Trim unit is not an easy task, the workshop does not have the spanner wrench for the trim cylinders (luckily they had one for the leaking tilt cylinder). But since the trim cylinders are not leaking I'm hoping it works out.

Cheers!
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Old 29 July 2009, 15:24   #6
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Quote:
Originally Posted by shahid View Post
Thanks for the encouraging replies!

I managed to get the Tilt cylinder opened in a workshop (didn't have the tools with me). Took the Oil Seal and O-Ring samples and took them to anotherworkshop that makes seals, O-Rings etc. given the correct dimensions. The quality etc. was as per the original seal.

Have got the new seal/O-rings fitted in the cap. Will take it back to the workshop tomm and see if the seals hold the pressure.

Will also post some pictures as soon as I get a chance to.

Unfortunately flushing the old oil out of the F115 Trim unit is not an easy task, the workshop does not have the spanner wrench for the trim cylinders (luckily they had one for the leaking tilt cylinder). But since the trim cylinders are not leaking I'm hoping it works out.

Cheers!

Good luck, hope it works out
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Old 10 August 2009, 13:47   #7
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Update

Took the entire unit to a turner who managed to open the trim cylinders as well. Then got the unit flushed and caps re-fitted.

Fitted back on the boat about a week ago and the unit seems to be working great so far.

Cheers!
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Old 10 August 2009, 13:52   #8
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Pics taken at the 2 workshops
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Old 10 August 2009, 15:12   #9
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Do you mind if I ask how much it cost you?
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Old 10 August 2009, 17:19   #10
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Not at all...The Oil Seal & O-Ring cost me about the equivalent of 4 GBP.

The Opening and later tightening of the Tilt & Trim cylinder caps cost me a total of 8 GBP.

The above two tasks were done at commercial workshops that have nothing to do with "leisure" boats. The flushing of the cylinders and removal and later refitting of the trim unit from the boat was done by a local Yamaha Dealer who obviously charged me "leisure" boating rates for his part of the work, equalling to about 100 GBP in labour charges. That was only coz I had involved them in the first place (entirely avoidable).
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