Originally Posted by rickuk3
It will tell you if the trim wires that run down the throttle have become damaged and are shorting causing the engine to trim down.
Rickuk3 you may be right in what your saying as it not happen until i increase throttle, its fine until i push on throttle.
I spoke with a Suzuki outboard Technician today and he said the same
it may be a short due to wires rubbing together at throttle,
cause in a slow speed the engine doesn't trim inwards its only when i increase throttle and push it forward that the trim drops in indicating the wires may short when throttle pushed forward past a certain point.
He Also said that it was probably not a hydraulic issue cause if it was the engine would trim out (not in) with the pressure of water pushing it back (trimming out) and if the hyraulic fluid was low there would be no pressure to keep it trimmed in against force of water when cruising a speed.
He said as did rickuk3 to try the trim on land, ignition on trim out a little and push on throttle to see if it happens.
must carry out a few tests the next day i'm near the rib.