MarineEngine.com - Your online store for all types of marine engines and boat parts.
PHONE ORDERS
Monday - Friday
9:00 AM - 5:00 PM EST
Click for TOLL-FREE Number
Online Checkout
Special $9.95 Flat Rate Shipping
(800) 209-9624 | Home | Contact | Shipping | Returns | Cart View your shopping cart.
Part Number Search
Shop by engine/drive part number.
Original & matching parts for sale.
Manuals & Accessories
Shop by description, item number
or manufacturer's model number.
Boat Repair Forum Boat Repair Forum   Boat Video Gallery Video Gallery
   
Get instant online access to repair manuals for your Mercury / Mariner outboard. Online Manuals
MercuryMariner
Order printed Mercury / Mariner service manuals — shipped to your door! Printed Manuals
MercuryMariner
Use engine diagrams to find & order parts for your Mercury / Mariner engine. Engine Diagrams
MercuryMariner
Find parts quickly with Mercury application guides. Quick Parts Guide
MercurySierraCDI
Results 1 to 2 of 2
  1. #1
    Charles Long's Avatar
    Charles Long Guest

    Default " At idle, runs fine but seems

    " At idle, runs fine but seems a little rougher than I remember. Stopped, in neutral will rev just fine. Under load, it bogs down. If I pump the choke, RPMs increase, if I let off, they decrease. Occasionally, it will run fine with no help from the choke. Any ideas? "

  2. #2
    Join Date
    Feb 2004
    Location
    Knightdale, NC, USA
    Posts
    57

    Default " Charles, From what I have s

    " Charles,
    From what I have seen posted on this and other boards, when you have a motor that acts like yours it is usually a fuel problem, surging, etc. Could be trash or water in gas tank, faulty pickup mechanism in tank, fuel hose sucking air.
    How long has this motor sat idle? Could be you need to rebuild carbs. Try a new gas line and some fresh gas W/oil-gas mix 50:1 ratio. Is it a VRO system?
    Ray "

Similar Threads

  1. 1997 Merc 40hp 2 stroke 4 cyl rpm drop
    By celton in forum Mercury Mariner Outboard Forum
    Replies: 1
    Last Post: 06-30-2010, 07:59 AM
  2. 1150 115HP MERC 1976 SURGING
    By rushman in forum Mercury Mariner Outboard Archive
    Replies: 2
    Last Post: 07-21-2009, 10:18 AM
  3. 1988 merc 99 2 stroke surging problem
    By deltaram in forum Mercury Mariner Outboard Archive
    Replies: 3
    Last Post: 02-08-2009, 11:30 AM
  4. 1997 40HP Evinrude cuts on and off
    By joefishin in forum Johnson Evinrude Outboard Archive
    Replies: 28
    Last Post: 05-07-2008, 05:05 PM
  5. How do you replace the water pump mercury 40hp 1997 outboard
    By rebecca wagers in forum Mercury Mariner Outboard Archive
    Replies: 1
    Last Post: 03-24-2007, 10:09 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •