Hi guys I just got my first bass boat a 1990 Ranger 393v.   Love it so far just wondering what I should have the trim set to when loading / unloading from the trailer.  Thank you!  

 

Matt

Depends on how deep the access is.  Generally just have the outboard deep enough so that its sucking in water through the intake and then go from there.

I leave my trim all the way up going in the water.
And once it’s on the trailer in the water and the bow is hooked to the crank I raise it all the way up and pull it out of the water.

It is different depending on if you are by your self or not and how you unload.  If you back in, climb aboard, start the motor, then push off, you need it deep enough to pick up water while running.  If you unload with a rope, leave it up until you are in the boat ready to get underway.
 

When power loading trim up enough to keep the motor from hitting the ramp as you move onto the trailer.  This will also raise the bow and facilitate the loading process.  
 

Repetition makes everything easier.

Trim up to have enough power to get the bow onto to the trailer's roller.

 

BE SURE TO KEEP MOTOR TRIMMED UP FAR ENOUGH TO AVOID DRAGGING THE LOWER UNIT OR PROP ON THE RAMP.

trim it all the way up

What he said.

Thank you everyone!

Get familiar with the trim of your outboard, it should have a trim indicator. 

The optimal trim is the level when running wot on the pad, somewhere between 1/2 to 3/4 depending on your boat and engine set up. Let's say for discussion (3/4) is trim setting and that is where you want it set when luanching and loading the boat onto the trailer to give you enough bow lift and protect the prop. After loading the boat, then raise the trim a few inches higher to prevent the prop ot skeg hitting the ramp when pulling out. No need to trim it all the way up, it results in the engine flopping overtoone side spinning the steering wheel.

Remember after launching to lower the trim before putting the boat on plane, then trim back up to (3/4).

When fishing alone have all the dock tie downs and bumpers attached and ready to use. Back up next to the dock about 12" to 18" away from the trailer fender. Get into your boat and start your engine if the prop is under water before continuing to launch, unhook the bow strap and check the drain plug. Back down and stop as soon as the boat starts to float, the fender should be about 1" above the water on most bass boats. Now get in the boat and back it off the trailer and secure the tie downs to the dock. Park tour tow vehicle and go fishing. Reverse the proceedure when loading the boat, taking note the water level on the trailer fenders when the boat started to float, that is where you want the trailer when loading.

Tom

All ramps are different. I agree with @Sam Trim it up enough to get loaded/unloaded without prop or skeg damage and it must be high enough to not suck sand and mud into your intakes. When loading, take a running start if you can and let the trajectory of the hull do all the work.