Suzuki Df140 Trim and tilt?

[ciaranp]

was out today first on new rib with DF140 Suzuki.

New to this game so a question to ask.

On setting off rib is nose high so trimed engine out a bit to level out but on increasing speed and revs engine trims back down itself fully.

Is this normal for the engine to trim in itself on increasing revs?

[xtreme]

when you trim your engine up you will bring the nose up more .. so if your nose is high from the start maybe you have to much weight at the stern of the boat .. what boat is it .. can you post a pic ?

how far are you triming the engine because when it goes past a point it starts to tilt not trim and if this happens the engine will tilt back down on its own but only to the top of the trim setting (if that makes sense)

ryan

[matt h]

Good to meet you on saturday Mr Extreme, thats an awsome bit of kit you have!!
sorry to nick the thread!

[ciaranp]

Originally Posted by xtreme

when you trim your engine up you will bring the nose up more .. so if your nose is high from the start maybe you have to much weight at the stern of the boat .. what boat is it .. can you post a pic ?

how far are you triming the engine because when it goes past a point it starts to tilt not trim and if this happens the engine will tilt back down on its own but only to the top of the trim setting (if that makes sense)

ryan

Humber detroyer 5.8m

[BruceB]

If you are nose high and are struggling to get up on plane, and you shouldn't be in a 5.8m boat with 140 horses, you should be trimming IN to drop the nose and when up on plane trimming OUT to level off the boat and bring the engine up to the most efficient angle for travel.
Unless you have a large Gorilla sitting in each one of those seats I wouldn't have thought you would have any problem getting it up onto plane with you engine, heavyweight FS lump or not

[ciaranp]

Originally Posted by BruceB

If you are nose high and are struggling to get up on plane, and you shouldn't be in a 5.8m boat with 140 horses, you should be trimming IN to drop the nose and when up on plane trimming OUT to level off the boat and bring the engine up to the most efficient angle for travel.
Unless you have a large Gorilla sitting in each one of those seats I wouldn't have thought you would have any problem getting it up onto plane with you engine, heavyweight FS lump or not

No problem getting up on plane when i increase speed.

Should i trim out when cruising along at around 30knots? seems to be ok trimed in when cruising.

Noticed today that when increased speed engine trimmed in itself?

[BruceB]

If you have a Tacho fitted then play around as follows-
Trim in just about fully, get up on plane and start trimming out bit by bit. Watch the tacho and listen. Revs should start going up bit by bit as engine is trimmed out until you reach the most efficient point. The revs and boat speed will then start dropping. As a rule of thumb the point where revs are highest is where you will go fastest with the least fuel. On most engines you can hear the change in note (not sure about FS) and will eventually be able to set it by ear.
Try a bit of playing around with different steeings of the trim watching the tacho and listening, you'll soon get the hang of it.........

this is for flat calm, the other ways of using the trim in various types of wave and weather are a bit more complex and are harder to explain in a limited post, experience will be needed here or a good teacher.......

[ciaranp]

When up on plane can't seem to trim engine out.

When i had engine trimmed out and increased speed engine trims in itself.

Any ideas what may be wrong?

[BogMonster]

Sounds to me like there might be a leak (perhaps internal) in the tilt/trim ram(s). I don't think any engine "automatically" trims itself as speed increases!

[rickuk3]

Could it be that the manual tilt screw is not fully closed and is allowing the engine to trim down. What happens if you fully tilt the engine up does it slowly drop down?
Richard