School boy error Mercury 7.5

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fastasfox England
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School boy error Mercury 7.5

Post by fastasfox » 24 May 2015, 10:32

Ok hands up i stuffed up, i didn't winterize my mercury 2 stroke :help outboard properly.I should have poured oil into the cylinders to prevent seizing but i didn't and guess what, i fetched the motor out of my caravan gas locker yesterday and its wont crank"BUGGER". I`m sure it shouldn't be too seized as it was running perfect before i stored it. I do need to have a proper look at it but so far i have flooded the cylinder with wd40 but so far no joy. Any idea`s gratefully received. :shame Any one need an anchor?

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Martin England
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Re: School boy error Mercury 7.5

Post by Martin » 24 May 2015, 12:55

Hiya fastasfox,
Sorry for the late reply, we've all been out and about yesterday in different places.

If it was mine, i'd remove the plugs and pop some two stroke oil in the bores and leave it overnight.
leave the plugs out and ensure the motor is in neutral, slowly.. very slowly try and turn it over. If it wont shift still, leave it upright and allow the oil to do its thing.
WD 40 is superb, but it will wash any oil that was in the bores away, although it may :roll: free the rings eventually, it'll allow the rings to scratch the bores if anythings gone rusty.
So it's best just left upright for now.

I'll be honest, I don't do the whole winterize thing.. I simply pore a drop of oil in the bores and then pull the engine over every month or so, just to keep things free.
F-RibsAndSibs.Com.... :whistle
Because it's a big old WWworld out there :mrgreen:

philpot Great Britain
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Re: School boy error Mercury 7.5

Post by philpot » 24 May 2015, 14:32

In all the years of owning an outboard, I have never had one winterized. I have never had an issue but I always always feather the engine when finished for the day which were the words of wisdom passed on to me with my first ever purchase. I don't know if it makes any difference but it is what I have always done.

I do stick the engines into a tub and run them during winter to keep things moving and although the winter has not been as bad as some we have had, no issues. I have just popped into the garage and pulled each engine starter and they all pulled through fine.

I am rubbish with motors of any kind, it is just not my thing so if it was me having issues, it would be round to my local marine engineer to give it a once over, a great bloke who does not over charge and is situated in the next village so very handy but just as importantly, a good guy to talk to when problems arise and does, I know, makes me very lucky. :star



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Re: School boy error Mercury 7.5

Post by blootac » 25 May 2015, 07:32

We've never winterised ours either, just run them dry of fuel then in the garage.

Check the obvious things, definitely not in gear when your trying to start it? Are you able to manually rotate the fly wheel when it's in neutral? Obviously doing all this with no kill cord attached just in case It decides to kick over.

fastasfox England
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Re: School boy error Mercury 7.5

Post by fastasfox » 27 May 2015, 12:46

blootac wrote:We've never winterised ours either, just run them dry of fuel then in the garage.

Check the obvious things, definitely not in gear when your trying to start it? Are you able to manually rotate the fly wheel when it's in neutral? Obviously doing all this with no kill cord attached just in case It decides to kick over.
Hi Bloo, I did check the obvious stuff ie was it in gear had something dropped down into the flywheel gearing (stone screw etc) but im afraid its seized. I have dropped 2 stroke into the cylinders and stood it on its side to allow the oil to penetrate but no joy. I have removed the pull start and that has no problems so i`m about to remove the head just to see if i can see the problem but i think its room 101 for this motor. I will let you know what i find, all the best. :scratch
Ps i thought the bit about putting the kill cord on was sound advice before manually cranking it,imagine if there had been a little fuel left in the carb.... :stop :shame :D

fastasfox England
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Re: School boy error Mercury 7.5

Post by fastasfox » 27 May 2015, 14:22

Ok not so much school boy error more bodger`s revenge. I have removed the head that was held on by 6 bolts two of them being a different size to both each other and the rest, one was even a random stud with a two different size nuts on the end. Now my un-expert view on the matter is that all the bolts should be the same and preferably new when you re torque the head back down after a refit. What did surprise me is that each cylinder is encased by a thick water jacket and not like a motorbike engine would be. Where each of the cylinder`s meet`s the head there was some tatty gasket with silicone round the lip where it met the head at the spark plug hole :no :no . The top of one of the pots looks ok but the other is knackered ie its so pitted that it looks like the surface of the moon. Thinking about it though i`m glad i never went far from shore with this motor because as sweet as it ran you never know whats going on inside. I didn't pay much for this motor and to be fair i never expected much from it but buyer beware you could have payed a lot more for your second hand motor without not knowing what you are really getting. I dare say if i open the block up i will find that water has been getting into one of the cylinders hence causing the damage (salt water would do that you know) if only the last person to have worked on the engine had made a proper job of it then this motor could have gone on for many many years.
I will now be looking for a new outboard and one day i will refurb this unloved little mercury then i will know it will be fit for use and i know i would be wasting both the time and money on it but i will turn it into a learning project (never had one of these to bits before). DON`T GO TOO FAR OUT WITH A OUTBOARD YOU DON`T REALLY KNOW WOULD BE THE MORAL OF THIS STORY. :cheers

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Re: School boy error Mercury 7.5

Post by blootac » 27 May 2015, 14:25

Ooo post photos!

fastasfox England
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Re: School boy error Mercury 7.5

Post by fastasfox » 27 May 2015, 14:36

Just one more thing.....i sound like columbo now :lol: a few of you stated you never winterize your outboard, well i can tell you i was surprised just how much crud was inside the water jacket that surround the cylinder and that could block some of the channels easy. If you use your outboard in salt water then i would definitely suggest you flush you motor well after each use and every couple of months i would give the motor a treat of the conditioner you can buy (not bloody lenor either :lol: ) and i would take the drain plug out of the cylinder head to see that the water runs clean after a good flushing.
Trust me you will thank me one day. :wavey

fastasfox England
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Re: School boy error Mercury 7.5

Post by fastasfox » 27 May 2015, 14:39

blootac wrote:Ooo post photos!
Hi bloo, tell me how to do that on this site and and will......and remember i`m no Steven Hawkins :D

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Re: School boy error Mercury 7.5

Post by blootac » 27 May 2015, 14:43

fastasfox wrote:
blootac wrote:Ooo post photos!
Hi bloo, tell me how to do that on this site and and will......and remember i`m no Steven Hawkins :D
You can either upload them to somewhere like google photos or tinypic if it's just the one, or flickr then share the link here, or... you can upload the pics as attachments when you create a new post/reply here. Below the message box there's an upload attachment button.

See here http://f-ribsandsibs.com/viewtopic.php?f=19&t=141

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