"She" got wet!!

Steve509926 · 03 August 2020, 21:07

Hi all, she being "Red" as my wife has christened her. I know not original or insperational but succinct and to the point!
Good maiden voyage on Ullswater, more of which I will discribe (with pics) at a later date.
I now need your advice and help re: OB mounting height.
I tried the outboard at the height of the transom then increased the height until the OB clamps was still just fully on the transom. I know what felt and sounded the best, but is there something I should be looking for?

Fenlander · 03 August 2020, 21:52

You are looking for the least splash/spray and the highest position but not too high to cause the prop to ventilate/slip in a tighter turn.

Steve509926 · 03 August 2020, 21:55

When you say ventilate, is that a bubbling noise from the prop as tho it's not gripping water?

Fenlander · 03 August 2020, 22:01

Yes and usually it revving for a few seconds as it loses grip.

Pikey Dave · 03 August 2020, 22:05

Quote:

Originally Posted by Steve509926

Hi all, she being "Red" as my wife has christened her. I know not original or insperational but succinct and to the point!

Good maiden voyage on Ullswater, more of which I will discribe (with pics) at a later date.

I now need your advice and help re: OB mounting height.

I tried the outboard at the height of the transom then increased the height until the OB clamps was still just fully on the transom. I know what felt and sounded the best, but is there something I should be looking for?

There really isn’t a right or wrong answer. It’s whatever feels right & suits the boat/load/conditions. It’s a bit of a dark art & involves a lot of trial & error. You’re aiming to reduce splash back from the leg whilst not losing grip. You also need to adjust the trim pin. Ideally you want the engine leg at 90deg to the water surface with the boat planing.

Steve509926 · 03 August 2020, 22:20

Thanks both, that helps a lot. Think I will need to raise/pack the OB about 20mm above the transom which will still mean the clamps are fully on the transom with 5 mm to spare, and have the trim pin 2 holes up. I'll give that a try tomorrow, one and two up and see how that goes.

jeffstevens763@g · 04 August 2020, 09:09

steve i set my excel up with cav plate at 10 mm below the keel which is packed at 40 mm i suffered cavitation in the chop so i will be lowering mine down to the transom which is 50 mm below the keel, the reason is i noticed the tube cones are hardly in the water on the plane thus keeping the transom higher the reason it cavitates, which is totally different to my mercury 365 each boat make has different characteristics and needs playing with to some extent.

pagick · 04 August 2020, 18:21

Quote:

Originally Posted by Steve509926

Thanks both, that helps a lot. Think I will need to raise/pack the OB about 20mm above the transom which will still mean the clamps are fully on the transom with 5 mm to spare, and have the trim pin 2 holes up. I'll give that a try tomorrow, one and two up and see how that goes.

With 5 mm to spare make sure to bolt it down. Even for a test. I had a 30 hp roll in my first boat. It was setup by the dealer without bolt holes. The motor was raised almost to where the clamping feet reached the top of the transom. And in chop the motor rolled into the boat while running. Thank god it didn't also twist around. I always bolt since that event.

Peter_C · 04 August 2020, 20:56

Cut a wood block or two of different heights to fit under the outboard. It won't rotate as easily that way. Also good to put a leash on the outboard if it is not bolted.