Grady White marlin trim tab replacement how difficult is it?

[MJM]

JI have several pinholes in trim tabs on my marlin want to replace , how difficult to remove and install new

 

[Ekea]

just the actual tab itself? its pretty easy. well, that assumes the boat is out of the water...

 

[seasick]

Pin holes could indicate a galvanic corrosion issue. Do the tabs have sacrificial anodes bolted to the plane? Were the tabs painted or otherwise coated?
I ask because if there is a galvanic problem it can eat your new tabs also.
To look up the tabs , measure the tab width and depth. If you are lucky, you will find an exact replacement.

 

[MJM]

Just bought the boat last October , previous owner had tabs painted, probably with the same copper based bottom paint for hull, no zincs.Anyway I found and bought a new pair because these are full of pinholes.I plan to install when boat comes out of water for 20 hour check on new motors if not that difficult.

 

[drbatts]

How old is the boat?

 

[MJM]

2005

 

[seasick]

Just bought the boat last October , previous owner had tabs painted, probably with the same copper based bottom paint for hull, no zincs.Anyway I found and bought a new pair because these are full of pinholes.I plan to install when boat comes out of water for 20 hour check on new motors if not that difficult.

Copper bottom paint on raw stainless tabs is a no no. There are several options: treat and apply a special two part metal primer followed by bottom paint. There are single part primers that are good also, like SEM
I have used Primacon aerosole https://defender.com/en_us/interlux...b794c6a468f56dc3584&utm_term=4580290577725217

Apply as many coats as the instructions say by a non copper based anti-fouling paint like Trilux 33 . The clear aerosole is garbage, use the black or gray spray. Three coats is a minimum.
You can also apply a non copper biocide based paint line Pettit HRT ECO which comes in a spray can. I have not used HRT but have used other Pettit products with good results

 

[Sardinia306Canyon]

A expensive but very well working solution for slipped/moored boats is PropSpeed wha can used not only on propellers, but also on other metal parts.
I will try FoulFree on my transducers and think about to use PropSpeed on the trim tabs.
Chris

 

[seasick]

A expensive but very well working solution for slipped/moored boats is PropSpeed wha can used not only on propellers, but also on other metal parts.
I will try FoulFree on my transducers and think about to use PropSpeed on the trim tabs.
Chris

Over here the smallish kit of Propspeed runs about $300! Probably overkill for trim tabs.
I am curious how many folks leave their tabs unpainted and if so, what are their local boating water conditions.

 

[Sardinia306Canyon]

Same here, thats why i wrote a expensive solution.
Same brand FoulFree looks as the same and one box is about 60$ and should be enough for at least 1 trim tab.

There is also Hempel Silic One i stumbled over in my local marine store, but i never tried it, however silicon base foul control seems to give nowadays very good results.

Hempel's Silic One is a biocide free, high solid, fouling release coating. Based on silicone, a hydro gel micro layer provides a smooth, low friction surface which prevents organisms attaching to the hull and propellers. Service life of Silic One on the hull is 2 years.

Chris