22' CD Transom angle?

John J · Posted: Tue Jul 04, 2006 9:10 am Post subject: 22' CD Transom angle?

Happy Fourth of July! I'm installing a transducer for my new Garmin 340C fishfinder. Installation requires knoweldge of transom angle. To give you some insight, I failed geometry in high school. By my measurement, the transom angle for my 2003 22' CD cruiser is about 20 degrees. Is this accurate? Can anyone help me? Thank you.

Captains Cat · Posted: Tue Jul 04, 2006 9:14 am Post subject:

Mike, is the boat out of the water? I'd assume so.

Just align the bottom of the xducer parallel to the bottom of the boat and a lilttle below. You should be good to go with no math.

Charlie

John J · Posted: Tue Jul 04, 2006 9:22 am Post subject:

Hi Charlie, Thanks for reply. Boat is out of the water. This thing comes with plastic shims. Directions state to use shims for different transom angles. What do you think?

Sneaks · Posted: Tue Jul 04, 2006 9:37 am Post subject:

Airmar P66 series transducer? I forgot the angle but you will definitely need the wedge and even then I had to do a little filing to get it precisely where Airmar wants it; slightly angled lower at the rear. A hint: Use dishwashing detergent on the puck to clean it and let the lake wash the detergent off.

Don

John J · Posted: Tue Jul 04, 2006 9:43 am Post subject:

Hi Don, Yep, that's the one Airmar P66. Thanks for the cleaning tip.

Captains Cat · Posted: Tue Jul 04, 2006 9:49 am Post subject:

Sorry, Mike on the John J (on edit) , if you're in the salt water near Annapolis, you'll also need to put some antifouling on it. West Marine sells it in a spray and a little brush on bottle for transducers. Well worth it, didn't have any on mine this year and withing 6 weeks it had barnacles growing on the bottom. When I took the boat out to go to Langford, I had to chip them off and now I have the paint again!

As for the angle, just below the hull, down slightly aft. You can eyeball it.

Charlie

John J · Posted: Tue Jul 04, 2006 9:53 am Post subject:

Ok, Thanks, Charlie. Good advice.

Falco · Posted: Tue Jul 04, 2006 3:56 pm Post subject:

John J

Use a sliding T bevel (http://www.sears.com/sr/javasr/product.do?BV_UseBVCookie=Yes&vertical=TOOL&cat=Hand+Tools%2C+Carpentry&subcat=Squares&pid=00939582000 to get the angle where you will install the transducer. Then hold the bevel over a protractor to get the angle in degrees.

My 2004 22's transom angle is 108 degrees or 18 degrees more than perpendicular (90 degrees). CHECK THIS ON YOUR BOAT.

CAVU · Posted: Tue Jul 04, 2006 4:34 pm Post subject:

Just out of curiosity I measured the transom angle on my 2002 22' cruiser. I came up with just a shade under 18 degrees. I measured near the centerline between the twin engines. I used two long straight battens and clamped them together at the pivot point. Strangely I noticed that the transom wasn't exactly flat but was slightly concave between the top edge of the motorwell and the bottom of the boat.

Adeline · Posted: Tue Jul 04, 2006 4:52 pm Post subject:

Hi JJ, Here is an Airmar P-58

A straight edge layed onto the hull will allow you to position the 'ducer correctly. Aft-end slightly lower. This is from my instruction manual

John J · Posted: Wed Jul 05, 2006 7:09 am Post subject: Thank you

Wow, A lot of responses and good information. CD people ARE special! Weather permitting, I'm going to work on her today. Thanks to all for the assist and good advice and pic. This will really help.
Mike on the John J