Recent Topics
Carfax please?
by gr8gatzby
01/24/15 09:46 PM
Loose.or sagging door
by mjoekingz28
01/24/15 09:38 PM
I Cut Open Three Random Purolators Today
by crazyoildude
01/24/15 09:35 PM
Question about car sales tax and moving
by FirstNissan
01/24/15 08:31 PM
Not sure what OBD
by 3800Series
01/24/15 08:16 PM
Regular $1.69, E85 $1.84....
by badtlc
01/24/15 07:33 PM
PP / Pennzoil synthetic when first in the market?
by stygz
01/24/15 07:13 PM
As the world turns - Recent Canadian self-defence
by OVERKILL
01/24/15 07:09 PM
Has Ford fixed the ecoboost carbon build up issue?
by HKPolice
01/24/15 06:42 PM
Engine lite was on but now it's off-cracked coil?
by Bluebonnet
01/24/15 05:37 PM
Another "what oil" for my Jeep 4.0 thread
by Brandon04GT
01/24/15 05:36 PM
Most miles or years you ever put on a vehicle?
by grumpyoldman
01/24/15 05:23 PM
Newest Members
briand069, koffy, 90South, mkm492, Sarah_blanco_007
52600 Registered Users
Who's Online
107 registered (-SyN-, 147_Grain, 41v, 74DartSport, 01_celica_gt, 2010_FX4, 7 invisible), 1427 Guests and 171 Spiders online.
Key: Admin, Global Mod, Mod
Forum Stats
52600 Members
66 Forums
225505 Topics
3587237 Posts

Max Online: 2862 @ 07/07/14 03:10 PM
Donate to BITOG
Topic Options
#3131601 - 09/21/13 02:02 PM Marine 8V92 Detroit (trouble shooting)
ottomatic Offline


Registered: 03/14/07
Posts: 159
Loc: TN USA
60'Viking with 2 8V92's. Port engine runs perfect. Starboard engine won't go above 800rpms. No water coming out exhaust & was probably overheated by previous captain.
What kind of damage could owner be looking at. No blow-by. No water in oil. Just won't gain any rpms. Thoughts?????


Edited by ottomatic (09/21/13 02:03 PM)
_________________________
14 JSW 6M
06 Duramax,170,000 mi

Top
#3131620 - 09/21/13 02:33 PM Re: Marine 8V92 Detroit (trouble shooting) [Re: ottomatic]
BigWrench9 Offline


Registered: 12/12/12
Posts: 8
Loc: Michigan USA
8V92's only need 2 things. Fuel and air. First pull the air filters, and test. If no change, pull the fuel filters, drain and check for water. Fill and re test. If no change, pull the fuel return line, if no good stream runs out while running, the fuel pump is more than likely the culprit. If all these tests prove ineffective, more than likely the "rack" is out of adjustment,(including the governor and dead stop), or the injectors may be suspect.

Also, if electric or manual shutdown, make sure shutdown lever is free enough to not be causing a "shutdown" condition.

Top
#3131629 - 09/21/13 02:47 PM Re: Marine 8V92 Detroit (trouble shooting) [Re: BigWrench9]
ottomatic Offline


Registered: 03/14/07
Posts: 159
Loc: TN USA
Thanks. I'll try the above. What bothers me is there is no water coming out exhaust.

Also it's been a few years since I worked on a 2 stroke.
_________________________
14 JSW 6M
06 Duramax,170,000 mi

Top
#3131649 - 09/21/13 03:19 PM Re: Marine 8V92 Detroit (trouble shooting) [Re: ottomatic]
Fleetmon Offline


Registered: 01/26/12
Posts: 1066
Loc: Pa
check the blower drive
_________________________
"In order to become the Master, a person must act as a servant."

NRA Endowment Member

Top
#3131894 - 09/21/13 08:38 PM Re: Marine 8V92 Detroit (trouble shooting) [Re: ottomatic]
hattaresguy Offline


Registered: 06/01/11
Posts: 5487
Loc: CT
Is 800rpm no load or under load?

The more pressing problem is that its not pumping water, that motor should heat right up, so I'm guessing 800rpm is no load? How did the motor overheat?

Check the impeller first, first step is getting it to run at temp and pump water.

Worst case its rebuild time, how many hours are on it?


Edited by hattaresguy (09/21/13 08:42 PM)

Top
#3132260 - 09/22/13 10:10 AM Re: Marine 8V92 Detroit (trouble shooting) [Re: ottomatic]
NYEngineer Offline


Registered: 12/12/06
Posts: 1087
Loc: NY, NY
Simplest thing ever on Detroits. Make sure the flap isn't closed on top of the blower.

I'm not positive marine engines have them but I know industrial gensets have them.

Top
#3133397 - 09/23/13 12:18 PM Re: Marine 8V92 Detroit (trouble shooting) [Re: BigWrench9]
FL_Rob Offline


Registered: 06/03/09
Posts: 1476
Loc: gulf coast FL.U.S.
Hi there..I see it's your first post.

Thank you for responding.My mos in the Army was 63Delta. Your statement on checks and re-checks is 100 percent invalueable... and thankyou again for becoming a member.


sorry I meant bigwrench9+


Edited by FL_Rob (09/23/13 12:29 PM)
Edit Reason: wrong name

Top