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Old 28 September 2010, 13:24   #11
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Originally Posted by Bigmuz7 View Post
And another daft one .. I take you push the key 'inwards' too when turning to start ? as that used to be what overfuelled mine when cold
Good evening Mr Big! Yes I do and that I think maybe my problem. So I am off to check bat connections, solenoid and pinion. Then I will start with only the choke. I will report back soonest.

J
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Old 14 October 2010, 12:54   #12
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Well folks I have been at the boat and have put into action all points made re my problem and here are the result!!

First ly the bat terminals not satisfactory not clean connections at posts, starter therefore not getting full power hence the click and whir. Starter looks ok pinion ok and connections ok but will grt it stripped down at service. But here is the biggy thanks to Uncle Al, when it eventually started I could hardly see the enginer for blue smoke and it sounded as if it was missing!! BTW still didnt start by choke it just flooded waitedf and did the throttle method.Took it out for an hour running fine, took plugs out and everyone was black and the holes were wet, got it mixture all to hell I think!!!
Thanks for all your help guys and any other comments will be gratefully received. Boat now out for winter!
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Old 20 October 2010, 11:24   #13
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hi Jambo
if it is any help the carb mixture screw setting is,
1-1/2 turns +/- 1/4 turn from lightly seated, keep it on the rich side even if it runs better slightly lean
service manual p/n 90-8240052r3 available from any merc/mar dealer any further help wanted just get in contact,
give your obm a good run on the water to clear any puddled fuel in the crankcase before setting timing ect.
alan
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Old 20 October 2010, 12:38   #14
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Originally Posted by uncle al View Post
hi Jambo
if it is any help the carb mixture screw setting is,
1-1/2 turns +/- 1/4 turn from lightly seated, keep it on the rich side even if it runs better slightly lean
service manual p/n 90-8240052r3 available from any merc/mar dealer any further help wanted just get in contact,
give your obm a good run on the water to clear any puddled fuel in the crankcase before setting timing ect.
alan
01869 32641
Hi Al tx When I took her out the water I actually nipped the fuel line so it ran til no fuel therefore the carbs etc are clean.
Tx
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Old 21 October 2010, 16:50   #15
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I've worked on loads of V6 Merc / Mariners and it 's usually ( if your sure the battery's ok) the battery leads or the starter motor's not turning the engine over fast enough to start when cold.
When cold they fire up then cut out and so on. You need a good cranking starter to get them to fire from cold.

Is the starter motor the original ?
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Old 21 October 2010, 17:26   #16
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[QUOTE=ADI;375490] I've worked on loads of V6 Merc / Mariners and it 's usually ( if your sure the battery's ok) the battery leads or the starter motor's not turning the engine over fast enough to start when cold.
When cold they fire up then cut out and so on. You need a good cranking starter to get them to fire from cold.

Is the starter motor the original ? [/QUO

Hi ADI tx for your comment. Batts still charging full now have then home and have just finished a three phase charge and there both over 13vlts. The battery leads were renewed 2 years ago from bats to engine. If you have looked at the thread from start you will have gathered that we have talked about the starter!! I never think it is ok and I am going to get it stripped down over the winter. Yes it is the original do you think it is due a new one?
Where abouts are you in Scotland/
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Old 21 October 2010, 17:49   #17
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Don't bother stripping it down and fitting new brushes etc, It won't be any better.

Just buy a new one. Not a Merc Mariner one, they are too.... expensive. PM me and I will tell you wher to get one.
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