Is my motor to low when planning

[jeffb5.8]

When my boat is on the trailer the Outboard looks to be at the correct height with the plate level with the bottom of my boat.

But!

When I am at full revs and planning along at 68km/h I decided to see what it looked like and I cannot see either the lower plate or the upper plate. This is with the motor trimmed up so the front is up and the motor is in the sweet spot.

 

will try and upload the video 

Edited April 30, 2018 by jeffb5.8

[jeffb5.8]

3DC1C62F-1B07-423C-AE94-EAEBF7820C70.mp4

[rickmarlin62]

is your lower cav plate parallel to hull  seems to be under water...at that speed u should be able to see upper n lower cav plates...rick

[jeffb5.8]

Yep Lower Cav plate is level with the bottom of the hull.

Edited April 30, 2018 by jeffb5.8

[jeffb5.8]

This is the motor at it’s lowest level and when planning I am at between 28 and 40 on the trim gauge.

[GoingFishing]

Excuse my ignorance but are you supposed to be able to see lower and upper cav plates when boat is on plane? 

I assumed as long as lower cav plate is level with bottom of the boat its fitted to manufacturers recommendation. 

What are the implications if u cant see? Havent tested my boat but now im curious

[jeffb5.8]

My understanding from reading is that when planning the bottom plate should just be under the water and the top one should be just above the water.

so in my case I think the engine should be one hole up, which will put the Cav plate in the right position when planning and trimed correctly.

i also may need to change props as I hit 5,950rpm when WOT in good to glass conditions with 2 Adults and 2 kids. So if raising it up increases the top RPM I will be over reving it

 

Edited April 30, 2018 by jeffb5.8

[rickmarlin62]

Raising it shouldnt alter your revs  pitch alters revs

[dunc333]

try raising it 1 hole mate

[onearmedfisho]

yeah a little low

 

[BWV]

It’s low, your antiventilation plate (bottom plate)should be clear of the water when planning, and only getting splashed.  Engines revs will increase as engine is raised as load is reduced.  Do a search on this topic, it’s been covered before. 

[JonD]

For high performance it looks to low, I personally have my outboard on its highest transom setting which has the bottom plate about 40-50mm above the bottom of my hull. In having it that height it is far lighter on steering, more senative to correct trim and most importantly better on fuel and faster.

It all depends on what you hope to achieve from the boat, check this site http://www.boats.com/how-to/the-outboard-expert-boost-speed-with-outboard-engine-height-adjustments/#.Wv9YatF_WhA

 

Edited May 18, 2018 by JonD