yamaha 30, trims down when revs increase?

eels

Recruit
Joined
Jul 8, 2009
Messages
1
Help Me Please! I Have A Yamaha 30hp Autolube 3 Cyl 1999,power Trim. When Its At Idle Or Not Running It Tilts Up & Down No Problem,but, When I Increase The Revs At All, The Trim Motor Kicks In & It Trims Down!, This Happens Whether I Increase The Revs, Either On The Control Box, Or At The Carbs,i Dont See The Connection & Its Keeping Me Awake,so If Someone Could Help Me Out, Before I Donate Any More To The Dealers Holiday Fund, That Would Be Great!
 

Stachi

Lieutenant Commander
Joined
Jul 14, 2009
Messages
1,671
Re: yamaha 30, trims down when revs increase?

Hey , I'm not familiar with your engine , but a wire short caused by the vibrations at a higher RPM may be the problem....I would try running engine with cover off ,duplicatethe rpm that the problem occurs , and wiggle the wiring that leads to your trim pump and see if the pump shuts off .... letus know what you find ...
 
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