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Old 16 February 2006, 14:31   #1
Country: UK - Wales
Town: costa del pontypool
Boat name: ole sharky
Make: sr4 now very fast
Length: 4m +
Engine: johnson 60 vro
Join Date: Jan 2006
Posts: 66
power trim and tilt

what is it

zip a de do da zipa de day orrr no its been another sh*t day
bigmike35 is offline   Reply With Quote
Old 16 February 2006, 14:39   #2
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Country: UK - Scotland
Boat name: imposter
Make: FunYak
Length: 3m +
Engine: 2 stroke YAM 20 HP
MMSI: 235089819
Join Date: Sep 2005
Posts: 9,416
expensive but worthwhile!

It is a way of raise or lowering the engine by flicking a switch at the console. With a reasonably big engine tilting it up (e.g. for launcing, beaching, shallow water etc) is hard work so this takes the effort out. Then there is trim - fine ajustments of the transom-engine angle which allow you to alter the engine trim and therefor the trim of the boat (to raise or lower the bow). This can be used to help get the boat on the plane or to help grip in sharp fast turns.

The bigger the engine the more important it becomes. The more likely you are to do things which alter the boat trim (e.g. differnet loads, weather conditions, or towing skiers) also make it more important. I guess where/how you keep the boat also influences the need - keep it in a marina might be less important than launching from a slip.
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Old 16 February 2006, 15:44   #3
Country: UK - England
Town: Norfolk
Make: Redbay
Length: 7m +
Engine: Inboard
Join Date: Jan 2004
Posts: 5,139
Trimming out/up can also help u gain a few extra knots.....
Tim M is offline   Reply With Quote
Old 16 February 2006, 18:13   #4
Country: UK - England
Town: Cowes
Boat name: Tabby Cat
Make: Halmatic
Length: 7m +
Engine: 2 x Yamaha 115
Join Date: Jun 2004
Posts: 388

It does what is says on the tin. Can increase performance of the boat, but too much can give you chine walk. The idea is to reduce the wetted area under the boat to give you better performance and economy.

Trim is more importantly used, in the prevailing sea conditions. If you are heading into a head sea then you will want the engine to be trimmed in to allow the hull to cut through the water. In following seas you will need to trim the engine out to lift the bow so as to prevent the boat from going into the back of the next wave. Dont think this method will resolve this problem as there are many other factors to consider when helming your boat in such condtions.

Simon Hawkins
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