most common problems faced with outboards 3-50 hp?

Discussion in 'Outboards' started by ozzmat2, Mar 8, 2010.

  1. ozzmat2
    Joined: Feb 2010
    Posts: 6
    Likes: 0, Points: 0, Legacy Rep: 10
    Location: england

    ozzmat2 Junior Member

    What in your experience are the most common problems faced, with outboards...mainly ones from 3hp up to 50hp??????
     
  2. Zappi
    Joined: Oct 2008
    Posts: 103
    Likes: 2, Points: 0, Legacy Rep: 31
    Location: Puget Sound

    Zappi Senior Member

    carbueration.
     
  3. jonr
    Joined: Sep 2008
    Posts: 721
    Likes: 11, Points: 0, Legacy Rep: 57
    Location: Great Lakes

    jonr Senior Member

    Old gas.
     
  4. CDK
    Joined: Aug 2007
    Posts: 3,324
    Likes: 148, Points: 63, Legacy Rep: 1819
    Location: Adriatic sea

    CDK retired engineer

    Especially 2 stroke engines: fuel evaporates from the carb, leaving only oil in the bottom passages and jets, so starting will be difficult next time.

    The solution:
    Do not switch off the engine after use but shut off the fuel and wait till the engine stops.
     
  5. souljour2000
    Joined: Aug 2009
    Posts: 481
    Likes: 13, Points: 18, Legacy Rep: 195
    Location: SW Florida

    souljour2000 Senior Member

    great advice CDK...
     
  6. CDK
    Joined: Aug 2007
    Posts: 3,324
    Likes: 148, Points: 63, Legacy Rep: 1819
    Location: Adriatic sea

    CDK retired engineer

    Thank you.

    I live just a few steps from the sea and watch people pulling like crazy to start their engines almost every day. Some give up exhausted and take the thing back home. Once a guy got so mad he rowed to the middle of the bay and threw his engine overboard.
    My old Mercury-5 just needs 2 pulls: one to wake up, the second one to start.....
     
  7. ozzmat2
    Joined: Feb 2010
    Posts: 6
    Likes: 0, Points: 0, Legacy Rep: 10
    Location: england

    ozzmat2 Junior Member

    cheers CDK thats sound advice prevention and maitenance is the key...
    a good clean spark plug helps aswell....
     
  8. Typhoon
    Joined: Mar 2009
    Posts: 125
    Likes: 8, Points: 0, Legacy Rep: 150
    Location: Australia

    Typhoon Senior Member

    The only issues I have with running a 2 stroke till it's dry is lack of remaining lubrication on the cylinder bores and rings. That and the fact the float bowls will still contain fuel.
    So if you're going to do it, pull the spark plugs, teaspoon of 2 stroke oil into each bore then a few turns of the starter, yanks of the cord. I also plug the air silencer intake with an oily rag. Leave a corner of the rag dangling out of the side of the cowl to remind you next time you start the engine.
    I've always started my 2 strokes monthly, year round, so I don't have this problem.
    I would say corrosion and improper flushing are the number one enemy of outboards. Hose down thoroughly after every use in salt water, run with fresh water till thermostat opens and don't tilt engine for 10 mins, to allow coolant to drain.

    Regards, Andrew.
     
  9. jonr
    Joined: Sep 2008
    Posts: 721
    Likes: 11, Points: 0, Legacy Rep: 57
    Location: Great Lakes

    jonr Senior Member

    What do you think of spraying fogging oil in as it dies (instead of removing the spark plugs)?
     
  10. ondarvr
    Joined: Dec 2005
    Posts: 2,700
    Likes: 420, Points: 83, Legacy Rep: 506
    Location: Monroe WA

    ondarvr Senior Member

    Fogging does a much better job, putting oil in the spark plug hole only helps the top end, the lower end is still left without much protection.

    Many people run the motor out of fuel, but yes, you lose some of your corrosion protection and it doesn't drain all of the fuel, only down to certain level. Some say this allows it to evaporate even faster leaving a dried oil and fuel scum in the carb sooner.

    Draining the float bowls is the only way to ensure they are empty.

    After saying that, people that use all or none of these methods have few problems. You will find people saying they've done it this way, or that way for the last 40 years and have never had any real problems.

    Carb problems are the most likely issues though, many are just from junk in the fuel.
     
  11. jonr
    Joined: Sep 2008
    Posts: 721
    Likes: 11, Points: 0, Legacy Rep: 57
    Location: Great Lakes

    jonr Senior Member

    I have a 4 stroke motorcycle that will absolutely not run until I drain the bowl and let it fill with fresh gas.
     
  12. gonzo
    Joined: Aug 2002
    Posts: 15,439
    Likes: 1,011, Points: 123, Legacy Rep: 2031
    Location: Milwaukee, WI

    gonzo Senior Member

    In the USA most fuel has 10% ethanol. It degrades fairly fast. With straight gas (petrol) the problems are less. Also, synthetic two stroke oil does not separate like regular types. The regular oil has additives that settle in the bottom and create that green jelly that clogs everything
     
  13. ben2go
    Joined: Jul 2008
    Posts: 183
    Likes: 4, Points: 18, Legacy Rep: 13
    Location: Upstate, South Carolina,USA

    ben2go Boat Builder Wanna Be

    Carb issues due to ethanol,ignition,bad impellers,and bad lower unit seals.
     
  14. tunnels

    tunnels Previous Member

    IF YOU LOOK AFTER IT AND TREAT IT WITH RESPECT IT WILL LAST FOR YEARS AND BE TOTALLY RELIABLE AS LONG AS YOU HAVE IT .:p
     

  15. dskira

    dskira Previous Member

    2 or 4 strokes?
     
Loading...
Forum posts represent the experience, opinion, and view of individual users. Boat Design Net does not necessarily endorse nor share the view of each individual post.
When making potentially dangerous or financial decisions, always employ and consult appropriate professionals. Your circumstances or experience may be different.