new guy

[sparky]

Hey guys...I just bought a 2005 1800SR3 and may have some questions for you guys...I had a ski boat back in the late 90's but got rid of it due to having kids so now the kids are older and we can use one again...So here I am This may be a dumb question but I noticed that the sacrificial anode above the prop is a flat washer, my last boat had one with a fin....whats the differece and should mine have a fin??? Thanks for the answers to my stupid questions.. Trust me I will have more for this boat...

[seapuppy]

welcome to the zoo....was your other boat an outboard???...you know..the anti torque fin has been a mystery to me...sometimes thier on an outdrive...and sometimes not...I don't think I've ever seen on most merc drives.....so..if yours doesn't have one....don't worry bout it..

don't worry bout askin dumb questions here.......we have plenty of dumb answers to go around...



SP

[sparky]

the last boat was an I/O also but it had a fin on that anode...No biggie just wondering what the purpose of it was???

[seapuppy]

it usually provides anti torque to the drive to keep it from wanting to turn right or left....if you don't have pwr steering..then it's usually used...if you have pwr steering...then not needed....that's about it..


SP

[vffb507]

Don't know if it is original, but my merc has one, but alas it is not power steering.. SP, either you've been around too long or just really know your stuff!!

[seapuppy]

" either you've been around too long or just really know your stuff!! "


Yes!!!

SP

[biggerseagar]

Sparky ........I do know this one..........just a change in design.......for the most part most boats nowadays have power steering and so there is no need for that fin on that anode. Yes replace it with a flat one......

And welcome back to boating!

Roger

[Warpa1]

My 3L has a fin and i had a discusion on another forum about it. Whether it was standard at launch in 1997 i have no idea, my marine engineer told me to take it off, would not give a reason he just said 'trust me'

I have no power steering either.

A reply from a UK forum;

Are you thinking its a standard fit? If so its not its an after market piece of kit to create rear lift to give a faster plain and a lower throttle plain

My Maxum came with hydrofoils fitted and personally I would remove them, throw them in the bin and fit smart tabs. Don't get me wrong I had hydros on my 9ft dingy and they really helped, they even allowed a bath tub type tender to plain with a 2hp outboard. but on our type of boat where you want to trim up to get the best out the boat on the plain, They don't suit

Smart tabs however still give you the lift they reduce wake give better fuel economy easier steering etc but still allow you to use your trim as you should.

Take them off its only 4 bolts, you will defiantly notice the difference, but you will get a greater effect with the smart tabs fitted

http://www.sportsboat.co.uk/forum/in...rb_v=viewtopic

[sparky]

Originally Posted by Warpa1

My 3L has a fin and i had a discusion on another forum about it. Whether it was standard at launch in 1997 i have no idea, my marine engineer told me to take it off, would not give a reason he just said 'trust me'

I have no power steering either.

A reply from a UK forum;

Are you thinking its a standard fit? If so its not its an after market piece of kit to create rear lift to give a faster plain and a lower throttle plain

My Maxum came with hydrofoils fitted and personally I would remove them, throw them in the bin and fit smart tabs. Don't get me wrong I had hydros on my 9ft dingy and they really helped, they even allowed a bath tub type tender to plain with a 2hp outboard. but on our type of boat where you want to trim up to get the best out the boat on the plain, They don't suit

Smart tabs however still give you the lift they reduce wake give better fuel economy easier steering etc but still allow you to use your trim as you should.

Take them off its only 4 bolts, you will defiantly notice the difference, but you will get a greater effect with the smart tabs fitted

http://www.sportsboat.co.uk/forum/in...rb_v=viewtopic

I think your talking about a hydrofoil, this is not what were talking about....It's a fin on the anode...

[seapuppy]

http://www.westmarine.com/webapp/wcs...classNum=10460
this is what he's talkin about only with a fin on it....


SP

[pascavone]

your old zinc was pointy like a sharks fin, and the new one is flat as a coin.

the electrolysis on a boat always comes off the pointy parts of a boat, prop, tabs, etc.

so your old boat used to use the zinc as a pointy part , but your new boat uses the whole mass of the outdrive and the bolt the holds it in place.

i would just buy the zinc kit that comes with the outdrive.

if its not broken, don't fix it.

[rens914]

i thought the pointy sharks fin also helps to steer in a straight line
if not
my mistake
rens

[seapuppy]

actually it doesn't help point the boat in a straight line....it helps counter torque of the drive...makes it easier for the drive to be turned against the torque as the prop is spinning...



SP