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Forum: Power Systems 12-01-2021, 08:41 PM
Replies: 57
Views: 6,498
Posted By Ski in NC
Bypass the oil cooler by forming a loop with one...

Bypass the oil cooler by forming a loop with one of the hoses to both ports of the engine block. Run engine and see if water shows up at the unconnected oil cooler ports on the cooler itself.

If...
Forum: Power Systems 11-30-2021, 11:19 AM
Replies: 73
Views: 7,877
Posted By Ski in NC
The high cost of the weld repair likely is to...

The high cost of the weld repair likely is to make it "like new". You could ask the prop shop to do a "redneck" weld, let it be ugly. Our NC prop guy will do that for us locally. Very inexpensive,...
Forum: General Discussion 11-28-2021, 04:10 PM
Replies: 65
Views: 14,438
Posted By Ski in NC
Your engines have a "boost cooler" that chills...

Your engines have a "boost cooler" that chills the water going to the aftercooler. At low rpm that cooler will sub-cool the whole engine as the coolant flow there meshes with the rest of the engine,...
Forum: Power Systems 11-28-2021, 03:54 PM
Replies: 96
Views: 5,516
Posted By Ski in NC
I too drive a diesel Jetta, yr 2001, 1.9ltr, 288k...

I too drive a diesel Jetta, yr 2001, 1.9ltr, 288k miles. Rotella T6 5-40 for last 200k miles. No issues.

Don't get too hung up with viscosity. Oil viscosity varies a LOT with temperature,...
Forum: General Discussion 11-28-2021, 12:08 PM
Replies: 28
Views: 2,510
Posted By Ski in NC
Diesels run at light to moderate load make very...

Diesels run at light to moderate load make very little CO. I'm not freaked out with the safety aspect of this, as long as you do have a functioning CO monitor or two.

Kinda looks like a Bowman...
Forum: General Discussion 11-27-2021, 09:46 AM
Replies: 65
Views: 14,438
Posted By Ski in NC
Don't overthink this. There is nothing sacred...

Don't overthink this. There is nothing sacred about 1200rpm. You can run your DD at any power setting that makes sense for the boat as conditions dictate.

But if you do run low rpm/light load,...
Forum: General Discussion 11-26-2021, 11:37 AM
Replies: 65
Views: 14,438
Posted By Ski in NC
There are (were) MANY 71's in generator service...

There are (were) MANY 71's in generator service that were equipped with small injectors and governed for 1200rpm. They would run for decades and gazzilions of hours.

Nothing wrong with running a...
Forum: Power Systems 11-26-2021, 11:19 AM
Replies: 5
Views: 961
Posted By Ski in NC
Seen a few boats do this. Common cause was an...

Seen a few boats do this. Common cause was an ignition or start switch on a flybridge or uncovered console. Water works its way into the switch and corrodes the contacts. Eventually they bridge...
Forum: Power Systems 11-26-2021, 11:08 AM
Replies: 29
Views: 6,152
Posted By Ski in NC
There are a few versions of the 6BTA that are...

There are a few versions of the 6BTA that are rated around 250hp. The one with the rotary CAV pump is an older model (around 1980's) and was not particularly good. Inj pump basically maxed out,...
Forum: General Discussion 11-21-2021, 07:12 PM
Replies: 17
Views: 9,802
Posted By Ski in NC
All diesels in that hp and age range burn about...

All diesels in that hp and age range burn about the same fuel for the hp they create. 16-20hp per gph. So it does not matter too much which engine you are running.

What does matter is what hp...
Forum: General Discussion 11-20-2021, 11:16 AM
Replies: 107
Views: 12,500
Posted By Ski in NC
Kanzaki KM5A looks like the flange bolt holes are...

Kanzaki KM5A looks like the flange bolt holes are 12.3mm dia, so a 12mm bolt will work. Flange thickness 12mm. So if other flange is same thickness, total of 24mm, room for nut and lock washer prob...
Forum: General Discussion 11-20-2021, 09:06 AM
Replies: 107
Views: 12,500
Posted By Ski in NC
What gear, what engine? What is the diameter of...

What gear, what engine? What is the diameter of the bolt hole? Not sure that was even the right bolt for the job.

I will PM you my phone number.
Forum: General Discussion 11-19-2021, 08:18 AM
Replies: 107
Views: 12,500
Posted By Ski in NC
No need for locktite or lockwire or castellated...

No need for locktite or lockwire or castellated nuts w/pins.

Standard kit for couplings (SAE) is fine thread bolts, nuts and lockwashers, all grade 8. If you can't find grade 8, grade 5 will do,...
Forum: General Discussion 11-18-2021, 10:26 AM
Replies: 107
Views: 12,500
Posted By Ski in NC
Seen that happen a bunch of times. Coupler bolts...

Seen that happen a bunch of times. Coupler bolts shearing. Most common on boats with tight access to that area where the last tech could not (or did not) get enough purchase on the bolts/nuts to...
Forum: Marlow - Mainship 11-16-2021, 09:24 PM
Replies: 33
Views: 7,508
Posted By Ski in NC
Make sure idle speed is not set low on the one...

Make sure idle speed is not set low on the one that rattles. Four bangers run rough at idle, and more so if idle rpm is low. That can absolutely cause gear rattle.
Forum: Power Systems 11-14-2021, 07:07 PM
Replies: 71
Views: 9,475
Posted By Ski in NC
I run a single with RH prop (like yours) and just...

I run a single with RH prop (like yours) and just a bow thruster. In reverse, it favors port. You can compensate for that if you want to tie up to stbd by putting rudder to near full port and...
Forum: Power Systems 11-08-2021, 08:12 AM
Replies: 20
Views: 3,041
Posted By Ski in NC
Need to know if tach signal comes off alternator...

Need to know if tach signal comes off alternator or from a tach signal generator or flywheel tooth counter. All are possible.

The one tach that does not work could be a symptom of a dead...
Forum: Power Systems 10-26-2021, 11:04 AM
Replies: 2
Views: 702
Posted By Ski in NC
13 is fine. Seen some with 13, some with 15. ...

13 is fine. Seen some with 13, some with 15. That 7 was probably put on by some previous owner or mech.
Forum: Other Trawler Systems 10-25-2021, 02:45 PM
Replies: 11
Views: 811
Posted By Ski in NC
Just last week troubleshot a boat that had two...

Just last week troubleshot a boat that had two brand new Dometic AC's and a brand new NL 12kW gennie. AC's ran on shore but not on gen. I checked gen output and it was 124/248Vac, Hz 62.3 unloaded....
Forum: Power Systems 10-12-2021, 09:23 AM
Replies: 28
Views: 5,848
Posted By Ski in NC
If alternator is wired up wrong, it can backfeed...

If alternator is wired up wrong, it can backfeed power through ignition wire that also feeds fuel solenoid. That can drive you nuts sorting it out.

Put a meter on fuel solenoid wire. See if it...
Forum: Power Systems 10-10-2021, 11:21 AM
Replies: 4
Views: 433
Posted By Ski in NC
Sounds like a Bedford, not a Detroit. Rare...

Sounds like a Bedford, not a Detroit. Rare engine in the states. Post some pics of heat exchanger and a few more random pics of engine. I've got a pretty good sense of what a zinc plug looks like.
Forum: Power Systems 10-10-2021, 11:13 AM
Replies: 8
Views: 3,907
Posted By Ski in NC
No harm mixing T4 and T6. Use which ever is...

No harm mixing T4 and T6. Use which ever is available without worry.
Forum: Power Systems 10-06-2021, 10:53 PM
Replies: 8
Views: 1,693
Posted By Ski in NC
Rub you hands on the bottom of oil pans. Common...

Rub you hands on the bottom of oil pans. Common for them to rust and get pinholes.

Also head gasket is not a common oil leak source on these. Oil is only up there with engine running, and does...
Forum: Marlow - Mainship 10-04-2021, 08:28 AM
Replies: 5
Views: 2,067
Posted By Ski in NC
So is the stop solenoid energized? That will...

So is the stop solenoid energized? That will keep it from starting. It is energize to stop engine, if energized on start, engine will not start, just crank over.
Forum: Power Systems 10-04-2021, 08:22 AM
Replies: 15
Views: 2,071
Posted By Ski in NC
195F on IR gun is pretty hot. Most of these run...

195F on IR gun is pretty hot. Most of these run 160-170F and an IR gun measures surface temp, coolant temp inside is like 5-10F higher than skin temp. And the shutdown switch is usually around...
Showing results 1 to 25 of 500

 
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