Difficulty 'trimming' the boat!

ivan4199 · 02 September 2008, 16:45

I have a trim button on my boat to affect the position of the water at speed. Problem is when its just me on board when I speed up at all the nose seems to lift too much. The trim button can tilt the engine either way, but I'm tilting it to the furthers point & still having the nose rise up too much?
Thanks for any tips, Ivan

Rigaud · 02 September 2008, 17:20

Quote:

Originally Posted by ivan4199

I have a trim button on my boat to affect the position of the water at speed. Problem is when its just me on board when I speed up at all the nose seems to lift too much. The trim button can tilt the engine either way, but I'm tilting it to the furthers point & still having the nose rise up too much?
Thanks for any tips, Ivan

Start off by trimming all the way in the down position and next I suggest you get proper trainning on how toopperate your craft.

The Garfish · 02 September 2008, 17:49

Quote:

Originally Posted by ivan4199

Thanks for any tips, Ivan

knite to d4 an bishup to g4

garF

captnjack · 02 September 2008, 20:40

What are your trying to accomplish by trimming it up???

shift weight forward
trim the motor down
keep the bow in control

Cookee · 03 September 2008, 11:08

Quote:

Originally Posted by ivan4199

I have a trim button on my boat to affect the position of the water at speed. Problem is when its just me on board when I speed up at all the nose seems to lift too much. The trim button can tilt the engine either way, but I'm tilting it to the furthers point & still having the nose rise up too much?
Thanks for any tips, Ivan

A lot more detail would be useful - boat make and model, same for the engine and what prop do you have on it - where is the fuel tank and any loose gear?

9D280 · 03 September 2008, 13:42

Ivan,

When you say the nose goes up, is tht just while you are accelerating, or all the time?

- If just while accelerating that's normal. To reduce it, trim the engine right down, then once you're moving, bring it back up a bit. If you are trimmed right down already, look at moving some weight forward or just live with it for the few seconds it happens.

- if it's "permanently" up there - could be down to a couple of things. The first could be an optical illusiion! My humber gives the impression of sitting at a really silly angle and the bow seems to be waaay up in the air compared to my old Searider. Having seen a broadside photo, in reality it looks fine when you're not sat at the wheel. The further back your seat is the more pronounced any "nose lift" will seem.

As said above the weight distribution issue may help as well. e.g If you have bought the boat recently did the previous owner have a 20Kg anchor & 30 yds of chain in the bow locker?

If all of the above don't explain it, post back, your engine may have a "traditional" tilt pin to set the lowest (furthest in) possible trim. My museum piece doesn't have PTT, but I need to set the trim pin at different places for towing, running with & without crew & storage! Again if you have a secondhand boat it may be in some inappropriate place from the previous owner's last movements (e.g to fit a towing supportwhen he / she last towed it home or similar. )

lakelandterrier · 05 September 2008, 12:52

I had the same problem with my 4m Avon. Even with the engine trimmed all the way down the and with anchor & ballast in the bow she wouldn't balance smoothly and handling was awful.

After taking advice from here I fitted a pair of doel-fins and trim & performance are now great.

As others have said, difficult to fully diagnose without detail of weight distribution etc.... but I've found the fins solved all of my problems.

ivan4199 · 05 September 2008, 19:34

thanks everyone for these helpful comments - passed my PB2 training just today in Bristol
so got some good tips about it there too, thanks again,. Ivan

MOGGE_MEK · 07 September 2008, 09:33

Quote:

Originally Posted by ivan4199

I have a trim button on my boat to affect the position of the water at speed. Problem is when its just me on board when I speed up at all the nose seems to lift too much. The trim button can tilt the engine either way, but I'm tilting it to the furthers point & still having the nose rise up too much?
Thanks for any tips, Ivan

hi there i have the solution for you i hope.... you are using the wrong prop for the boat you have... probably to big blade area or a to much bowlifting prop... wahat is the installed height off your engine ???? well give me the details and i will try to help you....