Mariner 2.0 hp

Slow_boat

Slow_boat

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I have just got an old mariner 2hp 2 stroke. Petroil leaks from the carb when the engine is tilted up. Is that normal? Would switching off the fuel tap stop it or should I strip and clean the carb?

What grade spark plug is correct?

Also, what should the fuel/oil mix be and how do people measure the right amount oil into the tank?
 
premix in a jerry can. i always add oil first (with a measurer) to the can then when it's filled u you know it's good to go.

Depends what age, but prob 100-1 but but i run mine at 50-1 as older motors tend to prefer it.

Close the fuel tap and let the engine run out, shouldn't have any more leaks.



Will usually have the fuel mix ration stuck somewhere under the cover.
 
The correct ratio for your engine is 50 to 1
Yes the fuel flow is normal,you have to close the fuel tap and
close the air screw on the tank before tilting the motor
cheers Joe
 
First question is how old. You can determine this from its serial number and This table

Yes it will almost certainly leak petrol when tilted if you dont shut the tap.

Shut the fuel tap (and the tank vent or it'll leak from there if its full.)

If it runs OK then there is no need to clean the carb. Don't fix what isn't broken!

Given the year we can find out the correct plug. But I think probably NGK B5HS or B6HS gapped at 0.024"

The fuel mix is almost certainly 50:1 but again knowledge of the year may be necessary to confirm it.

Measure the oil and petrol as accurately as you can. Don't guess it with these weak ratios. Most oil bottles are marked to enable you do do this otherwise its 100 cc of oil in 5litres of petrol It is much better to mix in a can rather than directly into the tank IMHO (

Really you should be using an 2stoke outboard engine oil to TCW3 specification but for a small engine like this an ordinary 2 stroke oil is probably acceptable.
 
Dont work in centilitres work in cc (cm³) 1000 cc = 1 litre so 50:1 is 1000/50 cc of oil per litre which is 20cc oil.
(if you must work in centilitres it's 2 centiitres per litre)
A cc is the same as a ml BTW
 
I'd forgotten about the manuals!!

Only add that the 24 thou plug gap is the current recommendation from NGK. If the plug tends to foul open it to 24 if it is difficult to start or any signs of miss firing close it down to 21!
 
I do not think that the little mariner gives a [--word removed--],it just starts
and goes,chuck in the anchor locker drag it out starts again
best £60 I have ever spent
And thanks again for the Manual
Cheers Joe
 
Last trip to Turkey I picked up my new Mercury 3.3. The dealer did the PDI and run test.

I then bought a plastic 5L fuel can, and then hunted around for a measure for the 2 stroke oil. Could not find one anywhere, then I spotted a pharmacy, popped in and bought a babies milk bottle with the measure on the side.

25:1 for the first tank full, and then down to 50:1 says the manual.
However I now have a 5L can of 25:1 minus the 1.4 L that I put in the tank, so I am thinking of topping up the fuel can with another 1.4L that will give me an intermediate mix of approx 33.1 then do the same again and it will take me to 50:1.

I also intend to measure the capacity of the 2stroke oil canister cap, think that it must be about 25ml. Then I will put a label on it, X caps of oil per Y Litres of fuel.
 
I bought a couple of <span style="color:red">Clickety Click</span> ==> these - no guessing, can mix a small volume of fuel accurately and no loss of oil due to it sticking to the measuring cup. Ideal for the ob, chain saw, stil saw etc.
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Artificial Intelligence is no match for Natural Stupidity
 
Hey Cliff, what a good idea! Despite having O/B's for over forty years, I still have to stop and work out the oil ratio each time.

Gonna order one tomorrow! /forums/images/graemlins/smile.gif /forums/images/graemlins/smile.gif
 
/forums/images/graemlins/grin.gif /forums/images/graemlins/grin.gif I thought so, so I bought a couple - one for the boat and one for the house (garage). As I don't need more than a liter at a time mixed they seemed a good idea and no more guessing at the volume of oil needed.
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Artificial Intelligence is no match for Natural Stupidity
 
[ QUOTE ]
I also intend to measure the capacity of the 2stroke oil canister cap, think that it must be about 25ml. Then I will put a label on it, X caps of oil per Y Litres of fuel.

[/ QUOTE ]

Check your petrol can cap, too. It was just right for me:

2621414198_4514fd8a6e_d.jpg


Andy
 
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