18ft Phantom with a mind of its own!

[speedygirlie]

Hi Guys

I have an 18ft phantom with a 150 XR2 on the back, it has a 21" laser 2 prop.

Can anyone tell me the offset for the engine, as it is riding on its port side. The engine at the moment is one and a half inches offset to the starboard side.

Whats happening is when you trim out, the boat straightens up but then its all over the place like an angry bee! When you start to trim slightly more the boat becomes uncontrollable, at 40 to 50mph (but theres still plenty of trim left in it).

The engine is sitting bang on the transom, but can anyone tell me the height it should be as I think it has been lowered (cut out), not too sure what the height is, but if I was to put the engine at 23" would that be too high?

Its a standard leg and a standard gearbox with the water pick up on the side. I know that this is not right as I have had a few phantoms.

Any information will be much appreciated (as I don't want to go out and kill myself yet lol)

Regards Hells

[Renegade]

At a guess your engine it too low. Would also recommend putting in the middle. Good luck

[oxo]

Hi Hells,
With my old motor with a standard gearbox I had the cavitation plate at 1.5" to 2" above the the very bottom point of the transom, cos that's what it said in the manual. Never had a problem with it.
Hope that's of some help!

[PerformanceDodge]

Originally Posted by speedygirlie

Hi Guys

I have an 18ft phantom with a 150 XR2 on the back, it has a 21" laser 2 prop.

Can anyone tell me the offset for the engine, as it is riding on its port side. The engine at the moment is one and a half inches offset to the starboard side.

Whats happening is when you trim out, the boat straightens up but then its all over the place like an angry bee! When you start to trim slightly more the boat becomes uncontrollable, at 40 to 50mph (but theres still plenty of trim left in it).

The engine is sitting bang on the transom, but can anyone tell me the height it should be as I think it has been lowered (cut out), not too sure what the height is, but if I was to put the engine at 23" would that be too high?

Its a standard leg and a standard gearbox with the water pick up on the side. I know that this is not right as I have had a few phantoms.

Any information will be much appreciated (as I don't want to go out and kill myself yet lol)

Regards Hells

Hi, may be a silly question but have you tried setting the angle on trim tab mounted on the cavitation plate. I had an 18ft Ring with Mariner 150 last year, the previous owner had fitted a smaller tab and set it the wrong way it pulled like a pig, laid on one side and as you gave it full throttle felt like it was going to swap ends at any point. Ordered the correct trim tab, and adjusted to full trim the opposite direction and it completely transformed the boat. The tabs seem to work in the opposite angle to which you expect.

Only a thought, may be worth trying before tacking drastic measures like moving the engine.

[Renegade]

Moving an engine up is not major, just try one hole at a time

[Burty]

i'd be checking the bushes in your mid section and play in your steering first!!

[Techteam]

Originally Posted by Burty

i'd be checking the bushes in your mid section and play in your steering first!!

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