Joining "torque club" - 2002 410DA

Dominic,
I am seeing the same numbers that you are, 23.6 to 24 knots at 2850 and 27.7 to 28 at WOT. I think Jeremy has a supercharger or something in his new 410 to get the numbers he's seeing!!! :grin:
Jeremy, whats the secret??? Dominic will tell you about the "secret spot" if you tell us how to get more speed.... :smt043

Good luck with the new boat. Looking forward to seeing you and all the others at BIH.
 
no supercharger... just the same CAT turbo and aftercooler as in yours...

I am only reporting what I see on the instruments. I bet it has a lot to do with clean bottom, freshly tuned props, and light load.

I did hear these boats are somewhat sensitive to load.
 
With a clean bottom, freshly tuned props and light load I still only run at 24 knots at cruise. Sounds like you have a race horse, enjoy it, it's not a bad thing !!! :thumbsup:
 
I have a clean bottom, brand spankin' new props with a fresh prop scan from Atlantic (22 X 22) and I cruise at 2350-2400 RPM making 22 - 22.5 knots.....
 
22x23 HiTorq's here (4 blade) and I cruise at just over 24 knots turning 2400 rpm's. I disagree about the 410 being load sensitive. Mine cruises at just over 24 kts. full fuel and water and the same with lighter loads. I have 3126's. I understand the older 450DA's were underpowered with 3116/26 and are load sensitive - I hear as much 2-3kt difference depending on loads. Just don't see it in my 410.
 
- long post - sorry

We brought our new 410 from Somers Point, NJ to the Chesapeake on Fri 6/29. Delivery trip was easy and uneventful - boat ran great in the ocean, enjoyed nice lunch at the Lobster House barge, and Delaware Bay was like glass on the way up.

We moved our "stuff" over the weekend (waterline dropped by about 2") and set out on a week-long holiday trip on the Upper Bay. We are enjoying the new boat, but a couple of issues popped up which have me concerned:

- Lost domestic water pressure after the first night at anchor. Seems like pump is sucking air but no evidence of leaks anywhere in the system. Picked up and installed a new pump at a local West Marine (just in case), bled the system, but problem persists. Water pressure is fine when tank is full, then just spitting when water level drops to approx. 3/4 tank. MM guys were scratching their heads, but in the end they believe that the tank pick up tube is either cracked or broke off. Unfortunately, there is no way to remove the pick up tube without cutting into the v-berth support structure (not enough clearance to unscrew the elbow). This is a project for this week. Annoying, but I guess it happens.

- On our way to Georgetown on the Sassafras for July 4th fireworks - port engine starts to lose oil pressure - gauge goes from 50+ to about 30 psi in less than a minute. At the same time temp climbs over 200. No alarm - I guess I shot down before oil pressure or high temp alarms went off. Quick look in the bilge - full of oil and oil spray. Now I'm pissed. Decided to limp to Gergetown on engine, pick up a slip, and get help. Ended up at Skipjack Cove, home of the Impulse III (looking good BTW), and enjoyed a nice fireworks show. Local CAT guy shows up on Thu to take a look - oil pressure switch cracked and blew out the oil. We temporarily plugged the hole with one of my Campbell Housefeld petcocks (waiting to be installed in Racord drain bowls) and filled the engine. Ran OK and held stready pressure, so it looks like we averted any damage, but exhaust water flow is weak and port engine is running at about 200 compered to 185 on the starboard side. CAT installed the new pressure switch and new impeller next day.

We left Sassafaras on Sat am for a quick run to Fairlee and back home on Sun. Despite new impeller, port side is still flowing less water and running hot at just over 200. CAT and MM say this is within specs - I don't like it. Could the oil blow out plug something on the cooling side? Any ideas?

Thanks
 
Did we talk about having the heat exchangers cleaned on this boat? Anyway, she's 5 years old and its probably time. A clogged heat exchanger is the likely cause of the overheating.

Another potential cause of flow and heat problems is the transmission oil cooler. They easily clog with sea grass that is small enough to pass thru the heat exchanger tubes but is too big to get thru the smaller oil cooler tubes. You can pull off the little 80 degree hose on the entry end of the tran. oil cooler and easily check its internal condition. In fact, in a lot of cases you can clean most of the grass out of them with tweezers and never reomve them from the engine.

The water flow can differ from side to side just because the plumbing is different on one side than the other. I'm not very concerned about that as long as you know the pump is doing its job and the heat exchangers are clean.
 
Frank,

Thanks for your advice. I pulled heat exchanger end cap yesterday and all tubes looked clean - no obstructions. Oil cooler is next. I know she's 5 years old - but just over 120 (we put on about 20 hrs since delivery).

CAT guys want to put in a new circulation pump ($2,900 quote), sounds very unlikely to me, any thoughts ?

Dom,

I am still planning on making the BIH trip pending resolution of the overheating issue. We will be arriving Sat early PM and have to leave Mon (work always gets in the way of fun). Can you post final list, including kids' ages? We will have our three boys 3, 6, and 13.

Thanks
 
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