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
   
Results 1 to 3 of 3
  1. #1
    Jim Kleban's Avatar
    Jim Kleban Guest

    Default "I have twin Mercruiser 454

    "I have twin Mercruiser 454's on a 40' Cruisers, Inc. My port engine recently stalled after running for about 30 minutes (the last 20 minutes at about 3,700 RPM. It began running very rough and wouldn't maintain RPM's, then stalled. It restarted, but idled rough and would not maintain any RPMs, then finally stalled again. Engine temp was normal (175), and no oil loss. About 2 hours later I was able to restart it and use it to pull into my slip. We tested the engine after it was restarted, and it was smooth at several different RPM's up to 3,000 (under no stress). The same thing happened the next time we took it out, after running for 30 minutes. I suspect it might be electronic, because I have digital tach's and when I tried to restart it the RPM's on the tach would jump around from 200 to 3,000 or so. It is a '94 with 1,200 hours, electronic ignition and 4 bbl Webber carb.

    Where should I start?"

  2. #2
    Not Me's Avatar
    Not Me Guest

    Default "Jim, The pick up coil in the

    "Jim,
    The pick up coil in the distributor or a bad ground can do this. So can many other things. The grounds to the ignition are easy to check so I guess do that first. Look for loose or dirty connections. What kind of shape is the cap,rotor and plug wires in? Coil getting hot? Sounds like it is minor whatever it is."

  3. #3
    Join Date
    Sep 2003
    Location
    New Tripoli, PA, USA!
    Posts
    12,436

    Default Sounds like bad gas of a flood

    Sounds like bad gas of a flooding carb.

    Jeff

Similar Threads

  1. 1978 SeaRay Mercruiser 228 stalls at high RPMs
    By ncsalpena in forum Mercruiser Sterndrive Forum
    Replies: 8
    Last Post: 03-23-2010, 06:45 AM
  2. Mercruiser surging after 20 minute warmup
    By rogerk in forum Mercruiser Sterndrive Archive
    Replies: 4
    Last Post: 06-27-2009, 07:51 PM
  3. Merc 43 Stalls At High RPM
    By mariahsx20 in forum Mercruiser Sterndrive Archive
    Replies: 8
    Last Post: 07-08-2008, 11:53 PM
  4. 2001 50L Mercruiser EFI Smoking during warmup Black and Sooty
    By robgauthier in forum Mercruiser Sterndrive Archive
    Replies: 3
    Last Post: 02-11-2008, 11:30 AM
  5. Mercruiser 140 High Idle and Stalls
    By Rod Stewart in forum Mercruiser Sterndrive Archive
    Replies: 0
    Last Post: 12-31-1969, 07:00 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
  •