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Yanmar: General -
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Yanmar SB8 won´t power sailboat at low RPMs (less than 1500 RPM) |
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Sat Nov 7 09 3:45 PM |
Today
03:45 PM |
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Robert
Yanmar SB8 won´t power sailboat at low RPMs (less than 1500 RPM)
I have a Yanmar SB8 in a Hunter 27 Sailboat.
Problem: Engine will not continue running with prop shaft engaged at less than 1500..... |
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NO Responses....
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Cummins:B Series -
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Engine RPM |
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9
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Sat Nov 7 09 3:45 PM |
Nov 5 2009
11:15 PM |
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Smokey
370 HP, cpl 2208´s. Rated at 3000 rpm. Now lets say they are propped at 3150. Assuming the raw water side is up to snuff. How dangerous or detrimental would it be to run at either of these RPM´s under..... |
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9 Responses....
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Yesterday
12:14 AM |
#1 |
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Tony Athens
You gotta do what you gotta do.. But the book says "1 hour of of 8" at 3000 RPM..
Tony |
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Yesterday
12:20 AM |
#2 |
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Tomas Kempe
One suggested reason for (150 rpm) over rated is that at rated rpm (3000 rpm) you be at about 90% load with less strain (load) on the engine. You can go at that for as long as it takes to replenish th..... |
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Yesterday
01:33 AM |
#3 |
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Bill D l
Smokey, my take on propping the 370s @ 3150 WOT. Propping @ 3150 WOT, yes one is "losing" some horsepower of the 370s @ lower rpms. BUT, overall, longevity wise and good engine management wi..... |
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Yesterday
01:35 AM |
#4 |
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Bill D l
Smokey, and if I ever had to run the "1 hour out of 8" @ 3000 rpm, I´d be WAY more comfortable doing that propped @ 3150 WOT...."comfort zone", EGT, boost etc.
Bill D |
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Yesterday
01:40 AM |
#5 |
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Ed H
Only if #3 is being experienced ;-) |
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Yesterday
02:39 PM |
#6 |
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Bob Mitchell
I suspect you can run all day at 3000 rpm. Maybe higher. I think all the internals would be as hot as they´re gonna get after an hour and as long as the engine is not seriously overloaded, you can t..... |
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Yesterday
03:59 PM |
#7 |
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Tom
Smokey - I know this is off point, but there are 1000s of trawlers out there that do 9 or 10 knots tops. Mine is a speed demon at 11 knots! So why worry? The worst thing you can do in an emergency is ..... |
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Today
01:17 PM |
#8 |
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Smokey
Thanks for the answers. Believe me, I am a firm advocate of nursing an engine not abusing it. I am just trying to learn what is damaging so I know what not to do. In fact I just bought the boat and wa..... |
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Today
03:45 PM |
#9 |
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Bill D l
Smokey, you gotta be kiddin me. (US)Do you know if the tachs are accurate?
How much blowby do you have going on in the engine room. How many hours on the engines?
You are very brave to make a 50 hr...... |
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General Diesel: General -
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Fuel Filter Change |
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Sat Nov 7 09 3:32 PM |
Today
02:35 PM |
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Phil
I replaced my Racor with Seaboard´s multi-stage fuel filtration at the beginning of this season, so all filters were new for the season. I´ve run maybe 1600 gallons thru them. I´ve drained a bit of fu..... |
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1 Response....
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Today
03:32 PM |
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Bill D l
Phil, same deal for me. Just finished the season with 135 hrs on the double/double. Still pulling same vacuum as new.
In my case for the "short" money, I´ll replace both filters each season..... |
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Volvo:40,41,42,43,44 Series -
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Paper seal on salt water pump |
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Sat Nov 7 09 3:22 PM |
Today
08:31 AM |
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Pepetou
Hello.
With my 2 tamd41A I run 200H each year. When I check my salt water pump impeller they are quite news. Each control, when i open the pump i have to change the paper seal. I am leaving France, ..... |
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2 Responses....
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Today
12:26 PM |
#1 |
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Port Engineers
Next time you install another gasket, coat the gasket on both sides with grease , some good and nasty marine or wheel bearing grease, put it all over the screws too.
this will keep the screws from ..... |
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Today
03:22 PM |
#2 |
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Bill
Pepetou,
Suggest you go to an autoparts store and simply buy sheets of gasket paper of the appropriate thickness. Take the gasket from your good running spare kit and trace it on the raw stock. Cut..... |
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Cummins:Older Models -
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Starter |
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1
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Sat Nov 7 09 2:49 PM |
Today
01:58 PM |
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Roly
The starter on one of my VT555s is turning much slower when it becomes hot, I suspect the bushings are worn. Can anyone tell me what I can expect to pay for a rebuit starter? |
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1 Response....
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Today
02:49 PM |
#1 |
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Ski in NC
A good alternator/starter shop can go through the thing for much less than replacement. Last big delco I bought was around $400, but might have been chinese copy. Worked ok. Make sure the replaceme..... |
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Detroit:92 Series -
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6v-92 Water In Oil |
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1
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Sat Nov 7 09 2:45 PM |
Today
12:40 PM |
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Garyd
Getting coolant water in oil. Have no Idea where it is coming from. It is not turning the oil milky and only appears to be happening when engine is running at nomal warmed up temp @ 170 DEGREES. DDEC..... |
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1 Response....
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Today
02:45 PM |
#1 |
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Ski in NC
How can you tell it is only getting in when warmed and running? Where are you seeing the coolant?
Possible leak sources:
Cracked head
Leaky injector tube
Leaky head water seal rings
Cracked ..... |
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Yanmar:LP Series -
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Raw Water Pump Relocate 315 6lp-ste |
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38
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Sat Nov 7 09 2:45 PM |
Oct 27 2009
01:54 AM |
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Robert Munroe
Is it possible to relocate the raw water pump to the front of the engine? Rather than on the side? I can barely get to it in my install and it makes for maintanence issues. Also has anyone removed the..... |
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Oct 31 2009
06:48 PM |
#36 |
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Robert Munroe
OK I went to the boat and investigated, the original Yanmar pump cannot be used on the front of the engine. First the manifold cannot be swithced it looks like it should be able to but it cannot. Seco..... |
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Today
02:22 PM |
#37 |
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Robert Munroe
So guys just want to revive this thread because I would be interested and by the looks of it a few others as well, what would a nanny raw water pump cost. (I know it has been shown to work, but curiou..... |
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Today
02:45 PM |
#38 |
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Arne Armoa
I was also getting impatient. Too bad moving the original pump doesn´t seem to be an option. An additional reason for moving it would be the potential need for replacing the impeller in a hurry in b..... |
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Detroit:71 Series -
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12V71T Overhaul cost - Bertram 54 |
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16
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Sat Nov 7 09 1:32 PM |
Nov 4 2009
01:55 AM |
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Mike Sobota
I´m casually looking at a 1984 Bertram 54. The survey report (which I have not seen yet but is on the way) indicates that one of the 12V71T engines (listed as 800 hp on the spec sheet) needs to be &q..... |
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16 Responses....
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Nov 4 2009
02:11 AM |
#1 |
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Got Diesel
How many hours do you pan on using the boat each year? Tim |
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Nov 4 2009
02:56 AM |
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Msobota
Limited for now ... 200 hrs per year ... summers only. I would be moving the boat to Maine where I´m able to spend time on it daily ... but that is still limited to 3 months of the year while the kid..... |
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Nov 4 2009
04:20 AM |
#3 |
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Ski in NC
Those 12v71´s can run for years even in a somewhat degraded condition...depending on what is wrong with it. Post what is found in the survey.
Engines are overhauled in the boat as long as the cran..... |
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Nov 4 2009
11:37 AM |
#4 |
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Msobota
If it comes to this, I´ll be looking for a DD specialist in Orange Beach AL who can work on these engines. The initial trip would be Orange Beach AL to Chesapeake Bay Maryland. |
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Nov 4 2009
03:48 PM |
#5 |
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Msobota
Attached is the engine survey that was done 2-2009. |
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Nov 4 2009
06:04 PM |
#6 |
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Ski in NC
Scanned through survey. Looks like the biggest issue is a bad top ring on one piston. And alot of old hoses, leaks etc. Rear seal leak is a big job to fix (gear has to come out) but often that leak..... |
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Nov 4 2009
06:24 PM |
#7 |
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Msobota
OK - Thanks for sharing these thoughts ... makes perfect sense ... I wonder ... if I ended up buying the boat whether I should have all of the hoses replaced ... maybe that broken ring repaired etc. b..... |
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Nov 4 2009
06:57 PM |
#8 |
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George Masters
I wouldn´t waste a dime on those engines. They are old and if you want to do any type of cruising over distance, you want something with better fuel economy. I would look for some factory rebuilds o..... |
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Nov 5 2009
01:43 AM |
#9 |
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Msobota
Thanks George ... I suppose that one of the downsides of this boat is that I don´t have a few years to run the boat and casually consider my options for re-power. Instead, it´s likely that I need to ..... |
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Nov 5 2009
09:04 AM |
#10 |
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Steve
Mike,
I have a customer in Florida with a 65´ Hatteras that has the 12v71´s. Same vintage as your looking at, after servicing the heat exchangers, inner-coolers, a few hoses and performing a complet..... |
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Nov 5 2009
02:55 PM |
#11 |
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George Masters
Mike, I don´t know how much you plan on spending on this boat, but I would definitely recommend just looking into to see how much a repower would actually cost. Do some homework and look for a set of..... |
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Yesterday
02:46 PM |
#12 |
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Tomcat
If you check the fuel burn charts for 12v71t at 20k for hp/gph and compare to new engines there will be little difference. Some better some worse. Change the rubber components, clean coolers and 1 pis..... |
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Yesterday
06:08 PM |
#13 |
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Msobota
OK - I´m excited about this ... we´ll see. I´m going to see the boat tomorrow ... I have a good reference for a diesel mechanic in the area from one of the Bertram31.com folks. All I can hope for no..... |
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Yesterday
09:28 PM |
#14 |
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Got Diesel
Tomcat, you need to check the charts again, 1271T is going to use 20% or more fuel. Tim |
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Today
02:57 AM |
#15 |
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Tony Athens
Tim,
There are those out there that don´t want to believe there can be anything that could possibly out do a Detroit.... I have personally repowered/replaced more that 250 Detroit 2-stroke engine..... |
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Today
01:32 PM |
#16 |
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Ski in NC
1271 will definitely burn more than a modern four stroke. The difference is probably greater at lower power settings, but then the difference matters less there too!!
The b54 is pretty sensitive t..... |
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Detroit:92 Series -
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8-92 Overhaul |
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2
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Sat Nov 7 09 1:10 PM |
Yesterday
09:06 PM |
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Bp
I´m planning to do a compression overhaul on one of my 8-92 TA engines next month. I´d like to get some feedback from mechanics with much more experience than I have. These engines are run anywhere bt..... |
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2 Responses....
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Today
01:02 AM |
#1 |
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Mds
My concern will be with the higher compression in relation to air box pressure. Higher compression and air box pressure on a turbo´d detroit wont help that top ring. |
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Today
01:10 PM |
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Ski in NC
Higher CR means higher temp at top ring. But it will burn cleaner. If you increase CR definitely go with smaller injectors. 115 (probably the 9215??) is pretty big for low load running. Might not ..... |
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Repowering:Luhrs -
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Hi guyz i am new here, ju |
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6
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Sat Nov 7 09 12:53 PM |
May 24 2008
06:37 AM |
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Harib800
Hi guyz i am new here, just wanted to open a new topic regarding my boat. You can say it is an inquiry
hows luhrs 32 with twin yanmar 315hp diesel? What what to consider to ensure it is going to last..... |
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Oct 31 2009
11:45 PM |
#5 |
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Got Diesel
The coolant is very important as Rws states. It might not be in the manual but on the 6LP you need to change it every year or 250 hours. Make sure you get the right stuff, you won´t find it at a aut..... |
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Today
12:53 PM |
#6 |
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Port Engineers
you can find the coolant in auto parts stores. you can probably find it at a K mart.
all it is is GM "dexcool" and a few different coolant brands make it,
it is a "ELC" cool..... |
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Volvo:40,41,42,43,44 Series -
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Timing setting |
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0
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Sat Nov 7 09 8:27 AM |
Today
08:27 AM |
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Pepetou
Hello . I have a 2 TAMD41A fresly rebuilt. One of them is running smooth, yhe other is noisy. I proceed for an oil analysis. They found a hight level of steel in the noisy engine. The surveyor suggest..... |
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NO Responses....
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Caterpillar: General -
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Does anyone make a combination full flow/by pass oil filter for a 3208? |
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1
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Sat Nov 7 09 5:01 AM |
Nov 2 2009
12:59 AM |
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J.
Last time I checked Fleetguard made a combo full flow/bypass filter for Cummings engines but not for Cat. Is anyone aware of another manufacturer? Is there a oil conversion flange available to conve..... |
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1 Response....
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Today
05:01 AM |
#1 |
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Das
Question cat first made the oil filter base in a 3208na to have a oil cooler by/pass, the oil filters had a by/pass in them. Cat then changed the oil filter base to have both the oil cooler by/pass an..... |
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Cummins:B Series -
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4 BTA - vibration |
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1
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Sat Nov 7 09 2:40 AM |
Yesterday
07:38 PM |
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Brian Heuer
Tony,
Ever put loctite or something similar on such things as oil pan bolts that have vibrated loose - or simply tighten them? |
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1 Response....
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Today
02:40 AM |
#1 |
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Tony Athens
Brian,
I am not a fan of using Loctite in this type of situation.. But, if they are tightened up properly, and then they come loose for no apparent reason, then maybe that´s what it will take with ..... |
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Cummins:B Series -
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How to Measure Wet-Exhaust Back Pressure? |
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4
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Sat Nov 7 09 2:30 AM |
Yesterday
05:29 AM |
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Frank Gee
Hello all,
I´d like to measure the exhaust back pressure, but had no idea how to do it. The engine is cpl 0742 6bt-5.9m, 210 hp. It has a turbo, then a mixing elbow which goes up then down, then ..... |
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4 Responses....
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Yesterday
01:37 PM |
#1 |
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Bill D l
Frank, take a pic and post the exhaust. Is there free standing water in the mixing elbow riser? |
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Yesterday
02:47 PM |
#2 |
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Jram
Frank- there should be a 1/8, or 1/4" pipe plug in the riser dry section[ on a stock cummins riser, this will be directly adajacent to the riser mount flange]
Regardless, if there is no plug, y..... |
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Yesterday
10:38 PM |
#3 |
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Bill D l
Frank, post some pics of the exhaust install.
We cam all go from there.
Bill D |
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Today
02:30 AM |
#4 |
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Frank Gee
Thank you guys! I think I know how to do it now, but I´ll try to take a pic of the setup just in case.
However, today I turned my attention to the other end and tried to give the engine less restr..... |
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Deere: General -
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Fuel pressure in a 6125 AFM marine engine |
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2
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Fri Nov 6 09 11:29 PM |
Jul 6 2009
06:16 AM |
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Dungyman
Hi everyone.This will be long.I have a 2003 6125 afm in a commercial fishing boat in Alaska.For the first time ever an alarm on the guage panel came on and the codes were SPN 1569 and FMI 31 which the..... |
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Yesterday
11:29 PM |
#2 |
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Port Engineers
So what was it? |
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