help with trim education?

[kdgncop]

sold our 85 bayliner that we just put the lower unit down on and used. now trim at all.

now have a 95 bayliner and want to be sure I have the proper starting and operating info.

starting:
do I first start it in the all the way up position and then lower afterwards, or lower part way and start, or all the way down b4 starting??

underway:
should I first start out with it all the way down and trim up as we go??
How high up can you trim b4 it starts to put extra strain on stuff??
what about for kneeboarding and wakeboarding??

I know these sound stupid but I just don't want to damage anything and would like to know from the pros!!

 

[ziggy]

Re: help with trim education?

never start it when it's up in trailer mode.
always lower it to start it.

when underway, always start with it all the way down. ya can then trim up useing the trim feature. it'll lock ya out of triming to far up it it works proper. when triming. find about the speed ya are lookin to go. trim up to best rpms on yer tach for proper operation.......

for watersports, i usually trim all the way down to compensate for the extra load at the stern from the person havein fun at the end of the line.....

 

[Boatist]

Re: help with trim education?

Every boat is different but in general when you get ready to bring the boat up on plane, trim all the way down or in. This will help the boat get on plane faster with less Bow Rise.

Make sure everyone is seated and apply near full throttle, With hand on the throttle and thum on the trim switch. As the boat come up on plane you will get some Bow Rise. When the hull over takes the bow wave the bow will come down, at this point start triming up so the bow does not plow.

As the boat reaches the speed you want to run reduce the throttle to maintain that speed. At this point without moving the throttle trim motor up solwely for highest speed and rpms.

Will want only the back 1/2 to 1/3 of the hull in the water on a nice day. This will be your most fuel efficent trim. Dont trim so high that the prop will caviate in turns.

If it choppy, or big waves or swells then will want to trim down to the point that the bow comes back down on the water to cut the waves and swells. Your triming for best ride. It will use a little more fuel but be safer and eaiser on the boat and crew.

 

[CBBAYLINER]

Re: help with trim education?

I am glad to have found this post. I am a new boat owner and yes its a 87 bayliner with a 125 force. My boat has a trim switch to the left of the steering wheel, this makes it hard to trim while holding the throttle and steering wheel. I been out a dozen times in the last couple months of owning it and havnt had any problem but hard steering to the right, but am working on the adjustment above the prop. I have been triming completly down and cruising like that. I usually go aeound 35 but have noticed the first time I took it out I was doing 40. The thing is I dropped the motor down and cruised, then I realized the trim motor takes over and it can go down further. This is helpfull to know since I had no clue how to properly trim. Anyway I will be in summerville this weekend tryin out a few new ideas and adjustments.

 

[SpinnerBait_Nut]

Re: help with trim education?

CB, you are using a lot of extra fuel you don't need to with it trimmed down while underway at that speed.
You can get the same speed out of it at less RPMs by trimming up and reducing your RPMs some.

 

[rogerwa]

Re: help with trim education?

As to the original post it does not say if this is an outboard or an I/O. If an outboard you need to have it down far enough that water covers the anti-cavitation plate. This is so that you ensure water is supplied to the water input ports on each side of the lower unit.

On an I/O you need to have it down far enough to where you are in trim range and not trailer. If you don't know what that means, just put it all the way down. The difference here is that the I/O has u-joints that will fail or get stressed if not down far enough. The water issue applies also, but adjusting for the u-joint issue will mor e than cover the water issue.

Using trim..

Start out with trim all the way in or down. Apply throttle until you are on plane. Adjust trim outward for max RPM at set throttle. Having trim all the way in will plow the bow into the water. Moving trim out will raise the nose up and reduce the amount of boat in the water, thus less friction or drag.

If you experience bouncing or porpoising, which can happen when trimmed out, then trim in a little and the bouncing will go away.

Each boat is different inhow it reacts to trim and is also affected by loading of the boat. Knowing the concepts and effects of trim will help you to adjust the trim approach to your own boat..