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Old 06 May 2013, 18:44   #31
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Thanks for this. It looks like you need to take the whole PTT unit off to get to the motor bolts. Is there a video or instructions anywhere on this?
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Old 06 May 2013, 19:21   #32
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You're better off taking the the whole unit off anyway-it'll be far easier to work on on a bench.

Get a manual. Don't even open it without one.
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Old 06 May 2013, 19:27   #33
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They're relatively simple bits of kit. There will be a (+tive) and (-tive) feed from the solenoids to the pump. Disconnect battery before working on it.

Manually release the valve to release hydraulic pressure and raise the outboard leg. The pump itself can be split into two halves. Normally held together with 10mm bolts, possibly 3-4 bolts around the circumference. Undo the bolts. Using a rubber mallet (don't use a hammer or it will end in tears) and knock around the trim pump to break vacuum seal. The top half of the pump contains the magnet so use a little force to separate. Once off you can get into the guts of the pump. I suspect Yamaha will probably sell pump kits including carbon brushes, 'o' rings and any other hardware required.

Check conditions of the carbon bushes. You can use a little brake cleaner on it if it looks dirty. If in doubt - post pictures so we can take a look. I've done this job on a Tohatsu, but they don't sell kits, so I overhauled mine.
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Old 07 May 2013, 05:45   #34
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Thanks guys. Where might I get a manual from? Are they available on line?
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Old 24 May 2013, 13:05   #35
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Well I have paid out a small fortune, but the T&T works again

I attach a photo of the horribly corroded one taken off. Surprising it worked at all really.

Yamaha do sell just the housing, and this is what was replaced. The price of this was bad enough, but what really got me was the price of the tiny sealing ring you can see in the photo. Any guesses.....?

EIGHTEEN QUID! I could not believe it.

It would make me think twice about buying a Yamaha again, or are all the rest just as bad?
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Old 24 May 2013, 13:12   #36
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It's all expensive. Some not as expensive as Yamaha, but then Yamaha do make pretty good motors.

I wouldn't let Yamaha spares prices put you off them.
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Old 24 May 2013, 13:46   #37
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I've had my share of similar PTT problems with my Yamaha . It was suggested to me that I should always try to wash down with fresh water as I'm flushing the engine after use . It's hard to resist giving the unit a squirt of WD40 but I'm guessing that not be the seal's best friend ?
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Old 24 May 2013, 13:49   #38
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I'm surprised you haven't got the whole lot coated in QS Corrosion Guard or an equivalent.

All my motors have a thick layer over the saddle/PTT etc.
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