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406 aft cabin issues?

Posted: January 11th, 2020, 5:27 pm
by Cosauder1
I’m looking at a 406 aft cabin next week. Any particular issues to look for?
Also, any intel on the Cummins t330 setup?

Re: 406 aft cabin issues?

Posted: January 12th, 2020, 2:36 pm
by Roccoa
I have a 2001 406 w/T370s. All these years, no real problems. Had the flybridge forward top brace reworked so that it extends about 2' forward, like a Portuguese , so more head room forward in first row and almost no rain coming in with izenglass rolled up. Also added forward splash rail diverters from bow to about 5 ft aft. Really throws spray out to sides instead up and on to froward areas. Allows more speed in rough weather with less plowing. The boat is heavy, over 27K and when fully loaded 30K so no speed races. 2400 rpms gets about 19-knots. Have 4 blades so a little more punch off line. Bow thruster is a great addition to have. Got a lot of sail area when forward and aft enclosures are fully up. Have surveyor check aft fuel tank. Some 406s were delivered with air breather too low to waterline and would suck up water into aft tank when underway in rough weather. Easy fix, but until remedied a problem when your tank got low on fuel and filled up separators with water cutting off engines. My trips are now shorter between marinas so emptied aft tank for over 700 lbs of weight off stern and only use saddle tanks. You won't notice much difference with running your 330s because 370s only really allow 200 more rpm at the top. Torque curves are almost the same until higher rpms. Engines are pretty much fool proof and with out all the new electronics, I believe, more dependable but nosier than new ones. Need to keep bottom cleaned since weight vs engines is a little against you. Make sure your engines had the 900 hrs maintenance. Costly. Never had any leaks or seeps anywhere, replaced few failed items, 2 bilge pumps, refrig, batteries(all 5), auto pilot rudder indicator, otherwise all other systems are original. Got rid of the standard engine raw water pumps and got Tony Athens Seamaxs. Greater flow, superior materials. Make sure the records show cleaning of aftercoolers and exchangers. Boat cooling system does not have much extra capacity, particularly in deep south summers. It's been a fine boat and compared to my many friends with different manufacturers, seems to be more reliable than theirs, especially considering how old it is..

Re: 406 aft cabin issues?

Posted: February 29th, 2020, 9:56 am
by Cosauder1
Thanks for the advice. That boat didn’t work out but all good info. Looking at a 356 next.

Re: 406 aft cabin issues?

Posted: February 29th, 2020, 6:37 pm
by g36
I have a 405 which is different year same boat. Not knocking a 355/356 but I think you may miss the extra room in the aft cabin,salon,sundeck and especially the engine room if you were drawn to the 406 size. Just my opinion.

Re: 406 aft cabin issues?

Posted: March 2nd, 2020, 7:07 pm
by Cosauder1
Thanks for the advice.