Unequal drive trim movement
03-29-2005, 11:34 AM
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Unequal drive trim movement
If I use the drive trim switch on the throttle lever, one of the drives changes trim faster than the other (I'm making an assumption that the indicators are accurate). I'm then forced to go to the panel switches to equalize the trim...sort of defeats the purpose of the throttle mounted switch. Is there a way to adjust this to equalize the drive movement?
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03-29-2005, 12:22 PM
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Re: Unequal drive trim movement
New boat = fun begins 
Check the indicators out of water as already said. If ok, then:
Check fluid levels on the drive pumps.
Raise / lower both all of the way several times - sometimes helps
Listen to the pumps - is one running faster (higher pitch) than the other? Maybe bad / corroded electrical connections, check and clean. Also a good time to check the battery / engine block connections as well for corrosion. Those pumps require a fair amount of juice, so it's important that all connections are known to be good.
If none of that works, go out and run it a few times - sometimes this happens when the boat sits for a long time. If you're lucky it may go away. If not, consult the tech q/a forum !
Good luck.
Check the indicators out of water as already said. If ok, then:
Check fluid levels on the drive pumps.
Raise / lower both all of the way several times - sometimes helps
Listen to the pumps - is one running faster (higher pitch) than the other? Maybe bad / corroded electrical connections, check and clean. Also a good time to check the battery / engine block connections as well for corrosion. Those pumps require a fair amount of juice, so it's important that all connections are known to be good.
If none of that works, go out and run it a few times - sometimes this happens when the boat sits for a long time. If you're lucky it may go away. If not, consult the tech q/a forum
!Good luck.
03-29-2005, 02:12 PM
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Re: Unequal drive trim movement
Originally Posted by jaybird
New boat = fun begins
I've got a bunch more issues rattling around in my head...I'm spacing them out just to keep things interesting....
03-29-2005, 02:16 PM
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Re: Unequal drive trim movement
Originally Posted by Troutly
My 312, 353, and 382 all did this. I just tweak with trim buttons on helm.
I see an invention opportunity...what about a programmable, digitally controlled trim system? It could have a memory setting...push a button and both drives move to 6 in unison (or whatever). Also, a step function...push another button and both drives move by 1 either up or down. Push another button and both drives move all the way down. Just need a little venture capital...
03-29-2005, 04:39 PM
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Re: Unequal drive trim movement
Originally Posted by CObarry
I see an invention opportunity...what about a programmable, digitally controlled trim system? It could have a memory setting...push a button and both drives move to 6 in unison (or whatever). Also, a step function...push another button and both drives move by 1 either up or down. Push another button and both drives move all the way down. Just need a little venture capital...
Very doable .....
03-29-2005, 05:44 PM
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Re: Unequal drive trim movement
Originally Posted by CObarry
I see an invention opportunity...what about a programmable, digitally controlled trim system? It could have a memory setting...push a button and both drives move to 6 in unison (or whatever). Also, a step function...push another button and both drives move by 1 either up or down. Push another button and both drives move all the way down. Just need a little venture capital...
03-31-2005, 04:57 AM
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Re: Unequal drive trim movement
It's most likely the different pump and pump motor rates. It is extremely hard to get two pumps/pump motors to run at exactly the same rate.
If the rate is off by a bunch, could be one of your pump motors is going south, happened to mine.
If the rate is off by a bunch, could be one of your pump motors is going south, happened to mine.
