Official 390 E.C. Thread

The "Pietro Tab" is something that Pietro has on his 390 that I more or less copied. It's a fixed trim tab that bolts onto the transom in between the prop pockets. Mine is built square, from aluminum plate, but when you mount it to the transom, it has about an 8 or 9* down angle due to the angle of the transom with the bottom of the boat. Mine is 24" wide x 21" deep. There are pictures of it on my swim platform thread. Now when I put the boat on plane, if I put the trim tabs down as well, the boat rises up all at once instead of going nose in the air. Once I'm up on plane, I can bring the tabs back up quite a bit and cruise at just the right attitude. I can now put the tabs all the way down and stuff the bow (not that I'd want to), but it would never do that before. Before the tab, I never could get the boat to ride like it ought to. Like I said earlier, I can hold plane down to about 26-2700 rpms, which I wouldn't have dreamed of before.
 
This is what I did to mine and also turns out the same awesome improvement in running attitude and performance. These are 2 12x12 trim tabs added inboard of the prop tunnels that function and are tied in to existing tabs. Very easy to do.


a6937150-68a8-50d8.jpg
 
That'd work too. The only concern I had about doing it that way was that the prop wash might catch the tabs and cause damage......apparently it doesn't though!
 
Need more sleeping space. When I purchased my 390 I noticed that there is no filler cushions to convert the dinette to a bed. My parts manual lists two of these but doesn't show a picture of them. Could someone please tell / show me what I am missing.
 
When we bought our 390 years ago, we wondered about this as well. We eventually discovered where they were. Lift your mattress in the fwd berth and look down into the huge storage space below the bed. That's where we accidentally found our cushions.

~Ken
 
Sadly, my guy couldn't get my "Pietro Tab" ready in time for my Spring launch date. I'm sure that it would have paid for itself in the first season's use. The tabs pictured in #182 would probably cost more to do and a bit more work than the fixed tab.
 
electricaldoctor said:
When we bought our 390 years ago, we wondered about this as well. We eventually discovered where they were. Lift your mattress in the fwd berth and look down into the huge storage space below the bed. That's where we accidentally found our cushions.

~Ken
Click to expand...

One day when I walked into the cabin from outside I was surprised to find the admiral standing in the middle of this space. She's very tiny and very curious. Didn't see anything down there.
 
Hi everyone,
I'm still getting my newly purchased 1991 390 into shape and really enjoying it. When I purchased it, the back cushion of the starboard bench seat (right behind the helm seat) was missing. There are are 4 rectangular holes, approx. 2"x 3" in the fiberglass along where the seat back must have been fastened. However, I'm at a loss as to how to attach a new one with no way to access it from behind. Any ideas of how it was held on originally or how to hang a new one? Any suggestions would be appreciated.
Thanks
 
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Wouldn't make any difference ... re-hinging mine very shortly. It's a real bi**h to get into the closet the way it is. Hinging it on the right will make all the difference in the world.
 
hey you guys, i got lost for a while, but i return with goods, Those pesky vent fans, I just figured out, they don't always work in the position of the motor facing upwards. I found this out finally because the last one i installed quit working, so i left it mounted and applied a separate 12 volt supply to it and it didn't run, then i pulled it out, and on the floor it ran fine! turned it so the motor faced upwards and it wouldn't run again, so i guess i'll mount them differently.
 
Hi Guys,

Need to order some magnisium anodes ASAP for my boat and get them overnighted. Almost forgot to do it. The survey does not say what size shaft I have. 1989 390 EC. 7.4l Gassers. if you can confirm the size that would be great. I'm thinking 2" but not sure.

Thank you,
Bill R
 
Thanks for the quick reply. I tried finding manuals on sea ray's website, but didn't see an option for the 390 EC. Guess I will just have to wait until they pull it this afternoon and have it measured. I will just be cutting it close to get them ordered in time.
 
br1212 said:
Thanks for the quick reply. I tried finding manuals on sea ray's website, but didn't see an option for the 390 EC. Guess I will just have to wait until they pull it this afternoon and have it measured. I will just be cutting it close to get them ordered in time.
Click to expand...


If its the same as my 88 390 EC they are 1.5 inches..thats what I ordered
 
Ok...here we go again..time to get some expert opinions!

Sunday we sat oh the boat and watched it pour down rain! See where my canvas needs to be waterproofed again!

But...more importantly..starboard side where the window is, that little ledge headliner kinda thing was soaking wet and dripping down. I suspect that is probably from the window. Can I put a bead of sealer around the window for now and then I guess over the winter, into heated storage, pull the window and let it dry out then reseal it?

How big a project is that going to be?
 
Denjb, pull the lower right dash panel and look to the right side. There is a rubber cushion/seal that leaks. The water then drips down thru the opening for the wiring into cabin. Seal that seam. You can pour a small amount of water between the console and starboard window to see if that is it.
 
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