MERCURY 2.2 PROBLEM

[DJB1]

Can anyone help me with a problem which I am having with my tender outboard. It is an old Mercury 2.2 and it has started to leak fuel and flood the carb.

It pours out of the bottom of the carb and obviously floods it.

Any ideas?

Thanks in advance.

 

[Topcat47]

The valve in the float chamber needs to be replaced.

 

[BAtoo]

[ QUOTE ]
The valve in the float chamber needs to be replaced.

[/ QUOTE ]

or adjusted...... & whilst you are in there clean out the crud etc

 

[VicS]

As others have suggested you shold be looking at the float and its associated needle valve.

There are a number of posibilies. Dirt preventing the valve closing properly or a worn seat or needle but if fuel is really pouring out then then probably something else.

They can stick , in which case a quick clean will sort it out.

The float may be punctured. Shake it to see if there is fuel getting into it.

Take care when dismantling not to lose any small bits. In some designs the needle can fall out and in others the float is hinged on a pin that is aslo easily lost.

The needle goes in pointed end first BTW

 

[misterg]

Hello & welcome /forums/images/graemlins/smile.gif

In addition to the good advice already given, another two things are worth checking:

1) Take the float bowl off and check there aren't corrosion products, etc. jamming the float, or the brass arm that the float bears on.

As already cautioned, take care not to lose the pin that the arm pivots on (it's just a loose fit in the casting), or the float needle valve which will fall out if the arm is allowed to hang down. If yours is like mine, the float needle hooks into a tiny slot in the brass arm, rather than just resting on it - important to get right when you re-assemble. If you do take the float needle out, look for a pronounced ridge on the pointed end - this might be the problem, but frankly I'd be amazed if it had worn out. It's usual to see a mark where the valve normally seats (IMHO). There should be a tiny, spring-loaded plunger in the other end of the needle (the end of which hooks into the brass arm) - check this is still 'springy'.

2) Check that there isn't dirt/crud preventing the float valve seating. If your motor is the same as mine, this is best done by taking the rubber petrol hose off the carb, and unscrewing the brass fitting that is the hose connector and float valve seat combined. Give this a rinse in solvent, and blow it through with compressed air (or a bike pump, etc.)

If there is dirt here, it's worth checking the fuel tank filter:

Where the fuel tap joins the tank there is a short length of rubber hose (1/2" or so). Inside this is a plastic fitting which holds a small filter. The filter just pushes on to the fitting, and can come off, resulting in all the crud that the filter has caught over the years being funnelled straight down to the carb.

I suppose, even before you try anything else, it's worth giving the float chamber a sharp tap, in case the float / needle have just got stuck.

Andy

 

[DJB1]

Thank you all for the advice, sorry I didn't reply earlier but I have had a devil of a job finding the original post??

/forums/images/graemlins/blush.gif

 

[VicS]

[ QUOTE ]
I have had a devil of a job finding the original post??

[/ QUOTE ] just put your own username in the "username search" box in the search facility.

Anyway have you sorted it? If so what was the cause of the trouble?


BTW a belated welcome to the forums.

 

[BrendanS]

much easier way is to click on username next to any post made, such as in this thread, and scroll down then click on show all user posts.

 

[DJB1]

Thanks for all the advice, I hope to have a go on Saturday.

I'll let you know what happens /forums/images/graemlins/confused.gif

 

[DJB1]

Well guys..........Dismal failure I'm afraid? /forums/images/graemlins/frown.gif

Got it stripped, cleared away some debris, did all you reccomended and still the Bl@@dy thing wont start!

Any ideas ....Please!

On a side note I only use this for my tender, have any of you any views on the small electric motors..... Good, Bad etc??

 

[gandy]

Are you getting a spark? The Merc 2.2 uses old-fashioned contact breaker and condenser, so these may need some attention, although mine were OK. Check the breaker gap which should be between 12 and 16 thou.

 

[Lakesailor]

Is the fuel fresh?

 

[VicS]

[ QUOTE ]
the Bl@@dy thing wont start!

[/ QUOTE ] You didn't say it wouldn't start.

1st, as already suggested check for a spark. A good fat juicy one not a little puny one.

If you dont get a decent spark. Clean/reset/replace plug, clean/reset points, inspect coil, replace condenser, replace coil.

If you get a good spark then its back to fuel/carb problems. Dismantle carb and clean all jets, orifices and passages. It might be necessay to clean jets with a stiff nylon brush bristle or a soft copper wire but take care not to damage them. Definitely nothing more than a copper wire.

Electric outboards: low power, heavy battery that will need regular charging. Much smaller range on a "tank full" of electricity than a tank full of petrol unless you have tame gorilla to carry a massive battery about. On the plus side: quiet

 

[VicS]

[ QUOTE ]
much easier way is to click on username next to any post made, such as in this thread

[/ QUOTE ] Agreed its the easiest way for a regular user who can find a post they have made. Not so easy for a newbie and not practical in this instance to use this thread because that was what he couldn't find!

 

[ShipsWoofy]

my merc which I have just replaced would do this regularly.

Mine, ate spark plugs, I would replace the plug around every 4 months, nothing, nothing would help this problem. No amount of cleaning would help, change the plug and watch it start first pull!

In the end I lost all trust in this motor and after moving back to a fast flowing river decided enough was enough. As it turns out, the new motor paid for itself imho when I had to get to the boat against a good 4kt current when the beautiful sunny weather of July did not appear and I had to battle against 2 weeks worth of torrential rain flowing down off Snowdonia and into the estuary.