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Old 24 June 2011, 19:16   #1
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Country: Australia
Town: Sydney
Boat name: Lunasea
Make: Ribtec 890SX
Length: 8m +
Engine: Yamaha ME 421STI x 2
Join Date: Aug 2009
Posts: 470
Yamaha Hydradrive won't go up enough

Just going through our new boat to make sure it is 100% right before we go out and discovered that the port drive will only go up to a point and then stop. Seems like a safety has cut in that stops it from going too high while cruising.

If I bypass the switch and apply power straight to the relay, it all works fine.

Any advice?

Also one of the starter motors is playing up on the ME421STi. Are they the same as the Toyota product? Or should a be looking at a starter relay first, not that I know where to find it?
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Old 25 June 2011, 16:18   #2
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Country: UK - England
Town: swanwick/hamble
Boat name: stormchaser
Make: custom rib
Length: 8m +
Engine: inboard/diesel
Join Date: Aug 2007
Posts: 3,848
The trim button on the controller is a two stage button. Push it harder for trailer up. The starter needs taking off and cleaning. The solenoid are easy. The plunger that pulls down to activate the starter has a rod on the end to push the dog gear onto the flywheel. What happens is the dog gets stuck on the shaft and stops the solenoid going full travel. Two 17 mm bolts and electrics on the bottom. One hour for the whole job. I'll take pics of drives tomorrow and pm you

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Old 26 June 2011, 09:16   #3
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Country: UK - England
Town: swanwick/hamble
Boat name: stormchaser
Make: custom rib
Length: 8m +
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pm sent
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