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December 31, 2023 at 12:15 pm #157626
I am sorry I missed this posting! I had a 2006 Tiara Sovran with QSCs that this was done to before my purchase. I needed to replace the gateway during ownership (which came from SBM) and it had one gateway sending both engine’s data to a Raymarine ES 127 mfd via the setalkng bone. It worked great!
December 18, 2023 at 2:37 pm #157370It has been several years since I did the replacement and I don’t have the file anymore but I think the tubes were around $700 at that time. You can get a quote from a Cummins dealer with a serial number, I am sure Seaboard could even help. Remember they carry the life blood of your engine and your tubes look fairly rusty to me and the picture looks like the hoses are cracked like mine were.
December 17, 2023 at 10:00 am #157328I had the same problem on a Sedan Bridge with QSCs and ordered the tube assembly from Cummins with the engine serial number. Pricey and tough to install. As far as cleaning and painting as Rob suggested mine were so bad I did not want to risk an engine. The problem was also on my pre-purchase survey along with cracked hoses leading to the tubes that was hard to see without close inspection.
September 27, 2023 at 7:23 am #154924He is crazy. I had that same boat, if it is a Sundancer, and after servicing everything, as mentioned by Steve, I ran that boat at 25-26 mph all day long and never saw temps above 180. I bet his EGT is off the charts.
October 11, 2022 at 8:00 pm #137795I was told by a Cummins mechanic I was anal when I asked him about a 5lb difference between engines on 480CEs! I would not worry about 1lb.
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July 16, 2022 at 2:38 pm #134294I had a 38 Tiara Open with this same issue. There is a friction adjustment in the synchronizer. I don’t remember if this problem was during sync off but there was some problem with cable adjustments too.
June 21, 2022 at 11:21 am #133324I had the same boat and actually had a Cummins tech hook up the scanner to see about the difference and was told Cummins allows for a 5% variation. He also said to be less anal!
I do recommend you do a fuel burn chart as described numerous times on this site, When I was dialing in my 420 I found I needed to reduce the pitch to almost 25 to get it within the 450 curve Tony recommends. This improved the performance in the rpm range where most sane people run their engines and reduced cruising fuel burn by 5-6 gph.
May 2, 2022 at 5:07 pm #131176The coolant is in the engine only. I went with Prestone Final Charge which is extended life OAT and nitrate free like the Volvo coolant. Volvo is not very helpful about specs.
February 2, 2022 at 1:03 pm #126176I think you will find you have 480CE engines in your 2005 Tiara.
January 18, 2022 at 9:12 am #125320I have done the pool acid the same way I do the aftercoolers by setting the cooler on a piece of foam and filling the cooler with the solution. I found it takes some weight on top of the cooler to keep it tight against the foam. I also cap the fittings for the fuel and trans oil to keep them clean.
I have thought about submerging the cooler in the solution with the fittings on but have not tried that approach yet. Maybe someone has or can comment on that procedure.
December 21, 2021 at 9:02 am #124279I use Don Derudder from M.A.L services. 239-633-6862 Punta Gorda FL. In my opinion the best in the area.
October 21, 2021 at 8:01 am #122185I ran into this problem on the same engines two years ago as a seller and it almost cost me a sale. My boat had 750 hrs, cold start was good and they did not use oil but the engine surveyor said 14 was too high. He was not a Cummins mechanic. I contacted 2 Cummins dealers and was told 14 is the high end of Cummins specs and QSC’s run higher than mechanical engines.
I purchased another QSC powered boat after this sale and the blow by tests were around 13. The engines were perfect. I did learn during this experience there is a specific size orifice the tec needs to use which can change the results if the wrong one is used but I don’t remember the correct size.
Good luck with your decision.
August 18, 2021 at 2:42 pm #119592I had these engines in a 2005 40 Sundancer which had a similar weight and once I got it dialed in it was a great running boat. It did take some discussions with the prop shop to convince them to reduce the pitch. They kept
saying “that is not what Searay says should be on there”!July 11, 2021 at 7:30 am #117810Did you check the fire suppression system lockout?
June 13, 2021 at 4:22 pm #116353Is there any chance the cruise switch is in the wrong position?
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March 25, 2021 at 1:18 pm #112345Steve,
Congratulations on your possible purchase, that is a beautiful boat. After reading your post and seeing the dark turbo tube I thought I would reply with what I found on a similar 480CE powered boat.
6 years ago we bought a 2005 420 Sundancer with 480s and only 530 hrs. After the purchase I found out one engine had dropped a valve seat (not disclosed to me). I went about doing the things on this site to bring the engines into line with the fuel curve. Along with a 2 inch pitch reduction I installed turbo/egt gauges. The interesting thing I found was at 2000 rpm the engines were still out of the curve by .5 + gph and the exhaust temps were much higher. When the speed was increased to 2100 the gph was in range and the temps were reduced by 150 degrees. At 2600 the fuel burn and temps were actually lower than the curve! I attributed this to the boat not being over the “hump” at 2k. This was also observed on a QSC powered Tiara I owned later.
The current owner of the 460 was probably running the engines at the highest exhaust temps even though he thinks he was saving them.Good luck on the purchase and when you get her dialed in you will have a great lake boat.
March 12, 2021 at 4:50 pm #111675I have had 3 QSC 500 powered boats of this vintage including an 06 44 like the boat described above and that turbo wrap has been on all three. While easy to remove the wrap is a bear to install. The exhaust on these boats is the doomed to fail design if it has not been replaced. Local Cummins mechanics told me to just put a new elbow on every 5 years!
One way to get an indication of the aftercoolers is to go into the Smart Craft and check the manifold intake air temp. I have found after cooling system/aftercooler service the intake air temp will be no more than 10-12 degrees above sea water temp even here in Florida. I dropped the temp over 20 deg. on my last boat after service.
As far as the 06 44 Dancer goes this is is a great package which is why they are selling so well. Get a good survey and figure in aftercooler service and enjoy!
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January 16, 2021 at 2:20 pm #109073Look at the end caps carefully. They will only come out in one direction. Remove the o ring on the end with the black diverter and you should see a flange. The other end has a stainless ring you can remove and press from that end. At least that was how mine were.
December 7, 2020 at 12:42 pm #107494I have owned a 2005 42 and a 2006 44, the difference being nomenclature and engines. I would buy an 06 or 07 over the 05 to get the common rail QSC’s. Great package in this boat. Less smoke and smell along with the digital read outs.
November 12, 2020 at 9:39 am #106534I think you need to test that core before going much farther.
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