- This forum has 683 topics, 3,279 replies, and was last updated 16 hours ago by
.
-
- Cummins Marine Forum Topics
-
-
Strange SMX Turbocator gauge readings
This topic has 4 replies, has 2 voices, and was last updated by
9 months ago
June 21, 2023 at 2:28 pm I’ve got a set of SMX Turbocator gauges on the 1969 Chris Craft Roamer I’ve been refitting. In preparation for finally launching the boat, I test fired the engines recently. I’m still on the hard, with no raw water source, so I removed the impellers and only ran the engines for ~10 seconds. Ever since, one of the gauges has the EGT needle sitting at ~800 all the time. The other gauge is at the low pin, where the other one used …
4 RepliesJuly 9, 2023 at 4:51 pm YUp, photo came through.Last Post by:
posted: 9 months ago
-
Excessive black smoke before and after turbos spool up
This topic has 1 reply, has 2 voices, and was last updated by
July 9, 2023 at 11:56 am Hi all. Been having this problem for a couple of years now. I have changed my fuel filters regularly and cleaned and pressure checked the aftercoolers. My motors are 6bta-m2 300 hp. It’s a 32 luhrs and props are 18×24 with a little cup. Not sure how much off hand. A well known prop shop tuned them beginning of last year. Seams like the turbos don’t really spool until 1800 plus rpms and some smoke clears up but I leave a trail of…
1 ReplyJuly 9, 2023 at 4:48 pm Your boat is most likely overpropped thus the black smoke. What guages do you have?Ā Ā Boost, EGT ?Ā Ā Do you have a digital laser pointer phototach.Ā If not get one from Ebay or Amazon or the local auto parts store and use it to check the revs then engines can reach UNDER LOAD as you are now.Ā Ā These things are accurate to +/-Ā Ā about 2 rpm. If you cannot reach the full RATED rpms for your engine + about 100 revs then you may need to rep…Last Post by:
-
Groco seacock grease zerk
This topic has 4 replies, has 4 voices, and was last updated by
June 10, 2023 at 1:39 pm Four questions: 1. My Groco Seacock valves have square head plug which the Groco documentation says can be removed and a grease zerk can be installed there. Can that plug be safely removed while the boat is in the water? 2. Will this fitting sold by Seaboard Marine fit the threaded open? <h1 class=”product_title entry-title”>Marine Brass 1/8ā³ NPT Zerk Grease Fitting</h1> 3. Can the grease zerk be left in place or do you n…
4 RepliesJuly 8, 2023 at 6:09 pm Change the grease fittings every few years, 2 – 4 yrs. They are available in brass , plated steel or SS only so are not highly seawater resistant. You don’t want them corroding into place,Ā Ā remove them long before.Ā Use a good thread sealer such as Rectorseal #5.Ā Ā Ā Even that plug is likely brass only so likely will waste away over enough time.Ā Ā JMOLast Post by:
-
480 ce hunting at low rpm
This topic has 9 replies, has 5 voices, and was last updated by
10 months ago March 1, 2022 at 6:34 am I noticed my starboard engine began hunting at start up about 3 months ago.Ā i figured maybe it was related to the cold or maybe a dirty filter, but i’ve recently replaced the fuel filters and now the weather is warmer and it still “hunts” at start up.Ā here is what i’ve found so far: symptoms while sitting at slip at cold start the rpms will fluctuate between 580 and 650 give her throttle about 900 rpms and she levels o…
9 RepliesJune 29, 2023 at 4:34 pm Luistormentaā¦I am curiousā¦.did your mechanic swap pumps between engines? Ā Did it make any difference? Ā Iām curious. Ā Pretty much my only remaining step to determine if itās the pump. Ā ĀLast Post by:
posted: 10 months ago
-
SMX 1727 Seawater Pump availability
This topic has 3 replies, has 3 voices, and was last updated by
10 months ago June 22, 2023 at 5:38 am Hey. The SMX 1727 pump and many others in the store have been listed as Out of Stock for quite a while. Any idea when/if they’ll be back in stock? Thx Q
3 RepliesJune 27, 2023 at 6:49 am We are still out 60-90 daysĀ for the mechanical 1730/1727 series seawater pumps.. TheĀ worldwideĀ supply chain went totalĀ poo-poo during the “VID” and has still not recovered…….. All QSB pumps are good in stockĀ ZF & Twin Disc gears,Ā & Cummins/Cat enginesĀ engines are still a year out + on most any new order unless you get luckyLast Post by:
posted: 10 months ago
-
6BTA 370 Fuel Leak
This topic has 2 replies, has 2 voices, and was last updated by
10 months ago June 19, 2023 at 10:11 am During a fishing tournament this weekend I developed a fuel leak.Ā The hose from the lift pump to the fuel filter was leaking.Ā It had a 1/4 inch spilt about 2 inch away from the lift pump.Ā I made a temporary repair to get back in.Ā I had about 25 gallons of diesel in the bilge by the time I finally got in.Ā The hose was Trident A1-15 1/2 inch. I am just wondering if there is anything I should be on the lookout for or just change the hose and c…
2 RepliesJune 23, 2023 at 10:22 am Thanks Clark, The hose was about 12 years old. No bend at the location.Ā I just changed it out. RonLast Post by:
posted: 10 months ago
-
QSL-9 Propulsion Time Between Overhaul
This topic has 1 reply, has 2 voices, and was last updated by
10 months ago June 22, 2023 at 7:54 pm Iāve been searching for information regarding recommended overhaul intervals for the marine propulsion QSL 9 and have drawn a blank. There is a commercial boat for sale locally powered by QSL 9 405 hp with 12,000 reported hours and no mention of a previous in-frame and/or top end maintenance. Iām trying to understand this engineās maintenance requirements before I Ā contact the seller. Any info that you guys could provide would be appreciated. Ga…
1 ReplyJune 22, 2023 at 11:49 pm GK, Tony has written quite a bit about the QSL. Ā Great engine that can last 30-40K hours if maintained properly, in a good environment and operated reasonably. Ā There will be quite a few things to research and understand about the current installation, maint history and how it was operated. Ā IF it all checks out you can see this could be just getting started. use the search feature and search QSL and then filter on Author = Tony Athens. Ā Lots t…Last Post by:
posted: 10 months ago
-
FRESH AIR ?
This topic has 1 reply, has 2 voices, and was last updated by
June 21, 2023 at 6:48 am I am installing a jabsco continuous duty air pump to the engine room. Is it more beneficial to have cool positive pressure air blowing into the engine room near the air intakesĀ or should it pull the warm air out?Ā Thanks in advance for your input.Ā Randy
1 ReplyJune 21, 2023 at 9:08 am If you pressurize the E.R.Ā Ā you may also force the warm E.R. air into the cabin area with all the odours it holds. Blow the E.R. OUT.Last Post by:
-
Water heater loop cap-off?
This topic has 3 replies, has 4 voices, and was last updated by
10 months ago
June 1, 2023 at 6:48 am I have a domestic hot water heater with a heat exchanger loop connected to my QSB 8.3.Ā The water tank is leaking; I have to remove the water tank to send it for a warranty claim.Ā Therefore, I won’t have a water heater for a while and need to rig the engine to run.Ā Ā <br /><br />My question is:Ā how should I handle the coolant loop hoses out of the engine? Option 1:Ā Cap off the input and output hoses for the coolant loop.Ā Op…
3 RepliesJune 20, 2023 at 3:06 pm Just bought a maxum 4600 with twin 8.3s.Ā Ā Rusted out water heater had the coolant lines barbed together. I installed a new heater and reconnected the water and coolant lines.Ā When you pull the barb, coolant will want to drain all over the space.Ā It is not under pressure so doesn’t take much to stop.Ā I put the heater in place, attached the water lines, made sure I had clamps ready to go, and I pulled the barb and put both lines on their…Last Post by:
posted: 10 months ago
-
Alternator Wiring to VE Argofet Isolator
This topic has 10 replies, has 4 voices, and was last updated by
10 months ago June 10, 2023 at 5:13 am Yesterday, after 11 months and 1,200 hours we pulled our Albin 36 out and ran a sea trial (drone photo below). Very happy overall with her performance. šš After returning from a two-hour run I noticed my start battery voltage was lower than normal (12.1V). I would have expected it to be full. I suspect it is something with my charging setup. I have installed a new 145-amp Delco 19si alternator on my Cummins 6BT engine. I have the alternator conn…
10 RepliesJune 13, 2023 at 6:58 am Looks real good.Ā So you put the DVM’s on momentary switches? I installed that same model Blue Seas DC panel in my personal boat a couple seasons back.Ā FYI – Last season I had a section of one of the strips of the LED backlights go out.Ā They sent a replacement strip at no charge.Ā Easy swap.Last Post by:
posted: 10 months ago
-
Under-Prop?
This topic has 1 reply, has 2 voices, and was last updated by
10 months ago
June 1, 2023 at 9:43 am I’m considering re-pitching propellers to free up some rpm on a pair of 6CTA8.3 M2’s. These engines have 2000hrs, early C’s. I just replaced the head gaskets due to external coolant leak at WOT. Replaced all sea water components after reading and learning here. Thanks. The engines make 2700 using optical tachometer on the harmonic balancer. The helm tach actually under reports the rpm by 50/100 rpm. Any downside to letting the …
1 ReplyJune 1, 2023 at 10:05 am The proper way to prop your boat is to load it down to the max that you would ever use it at. Then go do your wot tach check and you’ll want to see it at 2700-2750 for that engine. That way you’ll be safe at any load you use it with.ĀLast Post by:
posted: 10 months ago
-
2011 Zeus Pod Drives Any Good?
This topic has 2 replies, has 3 voices, and was last updated by
11 months ago
May 27, 2023 at 4:16 pm I’m considering the purchase of a 2011 Sabre 40 sedan with Cummins QSB 5.9 Zeus Drives, bow thruster, and skyhook controls, 905 engine hours. The boat is located in Florida and has been used exclusively in salt water; the boat would be berthed in the St. Petersburg area. Previous boat was a DeFever 49 CPMY with twin Perkins 135s straight shaft drive with Vetus bow thruster. What am I getting into with these pod drives that are now 12 years…
2 RepliesMay 28, 2023 at 4:17 pm Too unreliable and try finding someone competent to work on them. Hit something with an inboard nowhere near the hassle and expense you would have with pods.ĀLast Post by:
posted: 11 months ago
-
ED-2 display spinning
This topic has 3 replies, has 2 voices, and was last updated by
11 months ago May 11, 2023 at 4:23 pm Have a 2004 with QSM-11s and Port ED-2 display is a very slow (1-1.5 hour) to warm up.Ā Until then it spins like the old V-hold on a CRT tv.Ā Once it settles it’s fine and both gauges look great- no burn out.Ā Solutions?Ā Also are ED-3 and ED-4 gauges interchangeable with ED-2?Ā ThanksĀ
3 RepliesMay 14, 2023 at 8:35 am Sounds to me you have a display with aĀ glitch I have am not familiar with.. Contact Corey for options ( [email protected] )ĀLast Post by:
posted: 11 months ago
-
Project Update
This topic has 8 replies, has 5 voices, and was last updated by
11 months ago July 6, 2022 at 10:47 am Hello Forum, We have been hard at work on our 2005 460 Sundancer with 480CE’s.Ā We are part way through the second season with this boat and have made material progress in our list of projects and have 1 “big one” left to go. So far here is what we have done and the results of those efforts: Immediately after purchase we had the cooling circuit fully serviced off engine.Ā Since this is a fresh water boat the coolers came apart …
8 RepliesMay 12, 2023 at 5:59 am WW, We are a little over the curve as well.Ā We usually run 2220 – 2250.Ā We have Smartcrap display so I do not see load.Ā I only see total fuel burn not individual.Ā in our full cruise load/trim we burn 30gph at 2250 and are usually running about 22.5mph and then as fuel burns off or we get a following sea and/or breeze we might get up to 24mph.Ā We are about 10feet longer and 4ton heavier and in fresh water.Ā Work got in the way yesterda…Last Post by:
posted: 11 months ago
-
6CTA 430hP 8.3 RPM & Temperature
This topic has 6 replies, has 4 voices, and was last updated by
11 months ago
May 8, 2023 at 10:35 am Sometimes I run at 2,350 rpmās and temp is 195 Whatās the most RPMā s I can run a long run this Engine and is 195 temp ok or to hot?Ā Ā
6 RepliesMay 10, 2023 at 5:01 am Thanks Rob, I appreciate the info.Last Post by:
posted: 11 months ago
-
TURBOCATOR – BOOST/EGT
This topic has 1 reply, has 2 voices, and was last updated by
12 months ago April 27, 2023 at 6:24 am I run a pair of 370 Yanmars (2005) LYA’s with about 1500 hours on the clock.Ā Just completed a full service including new intercoolers, belts & hoses, valve adj etc.Ā I never had boost/EGT gauges and was considering adding them.Ā Are they useful at this point and what should I be looking for once they are installed.Ā Ā What should the boost and temp numbers be under normal operation and while cruising?Ā Are there maximums to be aware of…
1 ReplyApril 30, 2023 at 12:15 pm Any additional information you can provide yourself re: the engine is always valuable IMO. With Boost and Pyro, you’re looking to establish a baseline and trend that data over time as the values will “creep” over time… telling you when you need to take action i.e. cleaning the aftercooler, etc. Reference this chart for the specifications: https://www.sbmar.com/articles/marine-yanmar-quick-reference-guide-boost-egt-pyro/ R…Last Post by:
posted: 12 months ago
-
Canvas Cover & Throttle Position
This topic has 1 reply, has 2 voices, and was last updated by
1 year ago April 21, 2023 at 5:25 am Random question but figured I’d ask to be sure… I just had a canvas cover made for my lower helm.Ā It covers my hynautic throttles and shifters.Ā When the canvas guy did the template he had the throttles pushed up about half way instead of all the way down in the idle position.Ā Question is…will any harm be done by leaving the throttles pushed up while not using the boat?
1 ReplyApril 22, 2023 at 11:52 am I’d think not.Last Post by:
posted: 1 year ago
-
pre servicing
This topic has 2 replies, has 3 voices, and was last updated by
1 year ago
April 20, 2023 at 10:07 am what the term pre servicing means?
2 RepliesApril 21, 2023 at 6:35 am Perhaps the context it is used would help the forum help you.Last Post by:
posted: 1 year ago
-
Prop Nut
This topic has 1 reply, has 2 voices, and was last updated by
1 year ago April 4, 2023 at 10:50 am I just had my boat pulled for bottom paint and the starboard prop nuts have backed out to the pin. Ā This has happened every time Iāve had the boat pulled over the past 10 years even when the mechs are advised and try to torque it hard. Ā What could be used this time to get the nuts to stay in place? Ā FWIW the shafts are 2ā and the props are CJR nibral. Thanks
1 ReplyApril 4, 2023 at 11:44 am Here’s two references for you, a video and an article. In the first link, the video, Brendan goes through the full prop install starting at approx the 5 minute mark.Ā At around 7:30 he installs the 2nd nut with epoxy. Propeller installation / Big Nut vs. Little NutLast Post by:
posted: 1 year ago
-
Impeller quality vs price
This topic has 3 replies, has 4 voices, and was last updated by
1 year ago
April 3, 2023 at 6:24 am I see the Sherwood 17000 series for sale on line from around $35 to $70 a piece I ended up buying a 2 pack from sherwood $105 thinking the cheaper ones are probably inferior. Anyone know for sure?
3 RepliesApril 3, 2023 at 5:14 pm Ya don’t say, LoL. This one had me looking at the entire HX system before getting to it since it was relatively new I didn’t even think about it. But once I tried to remove it and saw just the hub coming out….I knew it was the issue.Last Post by:
posted: 1 year ago
-
Strange SMX Turbocator gauge readings
You must be logged in to create new topics.