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Old 16 July 2009, 15:45   #1
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4 stroke stored the wrong way.

Need some help. Bought a little boat today.
The outboard was stored at the sellers home.

Anyway it turns out that he put it in his boot the wrong way and oil has leaked out.
It's a Yamaha 4hp. The oil is very clean, it's not had much use.

This is what I am thinking to do, drain all the oil out, clean/degrease, remove spark plug and drain, pour petrol in the plug hole, shake it till I'm red in the face, mabe repeat, but see what comes out, let petrol evaporate, leave spark plug out, pull starter cord, see what comes out, if oil is still comeing out add more petrol to bore and pull starter cord (leaving the spark plug out.

These things I'm like thinking out aloud to do, haven't looked in the bore yet, it's getting dark.

Any ideas? Has it happend to anybody else?

Cheers.
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Old 16 July 2009, 16:11   #2
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I did the same with a 9.9 Yam High Thrust. A yamaha mechanic told me to set it upright, take out the spark plugs, turn it over by hand by rotating the flywheel a few times in order to get any residual oil out and then crank it over with the spark plugs still out. Did that and when I put the plugs back in it fired up and never missed a beat. Nothing too technical. The danger is when you don't realise it has sat with the carb at the lowest point allowing oil to get in, and then trying to start it.
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Old 16 July 2009, 16:22   #3
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all i did when i lent a sailing club mine and it came back the wrong way around in someones car was to stand it upright,for an hour or so ,checked the oil level , take out the spark plugs ,make sure they are free from oil ,turned the engine over 20 /3o times ,small squirt of neat petrol down the spark plug hole ,replace ,and started ,,only thing you will get is a bit of smoke for a while .then check the spark plugs for oiling up ,again ,
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Old 20 July 2009, 13:48   #4
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Thanks for your answers,
Got it working.

For the record this is what I did.

Cleaned the oil from spark plug.
Drained the carb.
Squirted about 3ml petrol into bore, leaving plug out.
Turned engine over about 30 pulls, with petrol switched on and choke on.
Not much oil/petrol came out the plug hole.
Turned fuel off, choke off, drained carb, another 30 or so pulls with the plug out.
Put plug in, turned fuel on with a small amount of choke.
A bit smokey but started on about the 5th pull, but thats now gone.
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Old 20 July 2009, 13:55   #5
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Quote:
Originally Posted by Ribbie View Post
Thanks for your answers,
Got it working.

For the record this is what I did.

Cleaned the oil from spark plug.
Drained the carb.
Squirted about 3ml petrol into bore, leaving plug out.
Turned engine over about 30 pulls, with petrol switched on and choke on.
Not much oil/petrol came out the plug hole.
Turned fuel off, choke off, drained carb, another 30 or so pulls with the plug out.
Put plug in, turned fuel on with a small amount of choke.
A bit smokey but started on about the 5th pull, but thats now gone.
Have you remembered to check and top up the sump oil?
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Old 20 July 2009, 16:11   #6
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Yup, good point.

The oil wasn't too low, I checked the sump to see how much was lost, but I suppose a little oil goes a long way.
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