Go Back  Offshoreonly.com > Technical > General Q & A
Help - Merc 454 can only get to 3900 rpm wot >

Help - Merc 454 can only get to 3900 rpm wot

Notices

Help - Merc 454 can only get to 3900 rpm wot

Thread Tools
 
Old 06-22-2015, 05:34 PM
  #31  
SB
Registered
iTrader: (1)
 
Join Date: Nov 2004
Location: On A Dirt Floor
Posts: 13,546
Received 3,115 Likes on 1,402 Posts
Default

They are usually blue loctited on. Will take some strength. And Sometimes a small chisel or etc to break the plastic. Be careful.

Last edited by SB; 06-22-2015 at 05:36 PM.
SB is offline  
Old 06-22-2015, 05:35 PM
  #32  
Registered
iTrader: (1)
 
Join Date: Apr 2014
Posts: 2,264
Received 177 Likes on 114 Posts
Default

As for the serial number, PM me with your email address and I will forward a Mercruiser Service Bulletin with alternative S/N location and engine specs.
GLENAMY 242SS is offline  
Old 06-22-2015, 05:37 PM
  #33  
Registered
 
Join Date: Mar 2001
Location: Marblehead Ohio
Posts: 256
Likes: 0
Received 2 Likes on 2 Posts
Default

Did you check to make sure the throttle is allowing the engine to run wide open?
snopro13 is offline  
Old 06-22-2015, 08:01 PM
  #34  
dna
Registered
Thread Starter
 
Join Date: Jun 2007
Posts: 228
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by SB
They are usually blue loctited on. Will take some strength. And Sometimes a small chisel or etc to break the plastic. Be careful.
Thanks. So should I put locktite on the new one or just push it down? Thx
dna is offline  
Old 06-22-2015, 08:03 PM
  #35  
dna
Registered
Thread Starter
 
Join Date: Jun 2007
Posts: 228
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by snopro13
Did you check to make sure the throttle is allowing the engine to run wide open?
Yup. Put the throttle on full and then removed the rod. It was on full on the carb too. Thx
dna is offline  
Old 06-22-2015, 11:38 PM
  #36  
dna
Registered
Thread Starter
 
Join Date: Jun 2007
Posts: 228
Likes: 0
Received 0 Likes on 0 Posts
Default

OK, confirmed that the flame resister cover's serial matches a tag on the engine block. Serial # is OD831888 - can someone confirm the type of motor it is (ie. mag or no mag) based on this?

Thanks
dna is offline  
Old 06-23-2015, 12:23 AM
  #37  
dna
Registered
Thread Starter
 
Join Date: Jun 2007
Posts: 228
Likes: 0
Received 0 Likes on 0 Posts
Default

I did some googl'ing - found that this serial says it is a 92 454 mag bravo gen v. Does anyone know the hp of this motor? Thanks
dna is offline  
Old 06-23-2015, 07:54 AM
  #38  
Registered
iTrader: (1)
 
hullofjustis's Avatar
 
Join Date: Oct 2006
Location: Baltimore, MD
Posts: 1,099
Received 9 Likes on 9 Posts
Default

I think the carbed mag is 365hp and the fuel injection is 385hp what year is it?
hullofjustis is offline  
Old 06-23-2015, 09:05 AM
  #39  
Registered
iTrader: (2)
 
Join Date: Oct 2012
Location: dfw texas
Posts: 1,332
Likes: 0
Received 2 Likes on 1 Post
Default

Damn . Sounds like you have the orig carb mag motor if the little tin tag on the back lower side of the block near bellhousing confirms it .should have enough balls to spin a 19 past 4000 rpm with a plug wire pulled and old gas.
Your going to find something .
airjunky is offline  
Old 06-23-2015, 09:12 AM
  #40  
Registered
iTrader: (1)
 
Join Date: Apr 2014
Posts: 2,264
Received 177 Likes on 114 Posts
Default

Alex, were you able to gain any info from my email?
GLENAMY 242SS is offline  


Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.