Recent Topics
Dino or Synthetic in Differentials
by totegoat
4 minutes 13 seconds ago
A/C weak when idling at a traffic light
by mclasser
16 minutes 56 seconds ago
USB Flash Drive for OS?
by Quattro Pete
50 minutes 3 seconds ago
What a 500,000 mile NYC Taxi Valvetrain Looks Like
by Best F100
57 minutes 51 seconds ago
Laundry detergent to clean oil rags
by Jake54
Today at 09:21 AM
Moving from Missouri to Florida next month.
by zach1900
Today at 09:16 AM
2015 F350 6.2L Gas Break In- Oil Change
by AirgunSavant
Today at 08:30 AM
Greasing Ford wheel bearings
by buck91
Today at 08:29 AM
Coolant change question
by BigD7
Today at 07:20 AM
vanline refuses to relocate my stash
by 08sienna
Today at 07:01 AM
Negatives of more oil
by mjoekingz28
Today at 06:30 AM
MMO Added To Oil : Go up a Oil Grade ?
by ChrisD46
Today at 05:21 AM
Newest Members
Scast, bronco79, Everrocking, doc4bax, trailhauler74
54866 Registered Users
Who's Online
103 registered (2civics, ABursell, 1foxracing, adamrc, 97f150, 2009Edge, 10 invisible), 1749 Guests and 125 Spiders online.
Key: Admin, Global Mod, Mod
Forum Stats
54866 Members
66 Forums
235042 Topics
3780823 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: 168
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,192,000 mi

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


Registered: 12/12/12
Posts: 12
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: 168
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,192,000 mi

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


Registered: 01/26/12
Posts: 1073
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: 6317
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: 1095
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: 1488
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