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Old 21 September 2008, 11:42   #1
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realy need help.

hi there i have baught a yamaha 8hp engine. i have no idea of the age but the plate on the bracket that holds it to the transom says it is a yamaha 8b 677 l318849. firstly has anyone got any idea of its age. most importantly i am after spares for the thing i would like to fit a new impellor maybe a new prop if its not to expensive and odd bits and bobs like the catck that holds the top cover down has snapped. so in short i would like to know...
1. the age of the engine
2.where i can get spare parts from
3. o and finally has anyone got any idea what gearbox oil i put into it can i just put normal car gearbox oil into it.
Thanks to anyone that gives me any information.
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Old 21 September 2008, 12:54   #2
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You need proper marine gear oil. It's only a couple of quid for enough for your engine so it's a false economy to use anything else.
Had a quick google and this place:-
http://www.marinewise.co.uk/
should able to sell you anything you need as they are a Yamaha main dealer.
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Old 21 September 2008, 13:17   #3
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does anyone no of anywhere online that i can the parts because im gessing main dealer prices will be pretty high.
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Old 21 September 2008, 15:05   #4
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Originally Posted by dirtrider212002 View Post
does anyone no of anywhere online that i can the parts because im gessing main dealer prices will be pretty high.
Main dealer prices will still be cheaper than paying postage on top and you can take them back if you get given the wrong ones.

Besides, no-one makes pattern mechanical parts for small outboards.
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Old 21 September 2008, 15:46   #5
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Quote:
Originally Posted by dirtrider212002 View Post
hi there i have baught a yamaha 8hp engine. i have no idea of the age but the plate on the bracket that holds it to the transom says it is a yamaha 8b 677 l318849. firstly has anyone got any idea of its age. most importantly i am after spares for the thing i would like to fit a new impellor maybe a new prop if its not to expensive and odd bits and bobs like the catck that holds the top cover down has snapped. so in short i would like to know...
1. the age of the engine
2.where i can get spare parts from
3. o and finally has anyone got any idea what gearbox oil i put into it can i just put normal car gearbox oil into it.
Thanks to anyone that gives me any information.
Personally don't swallow that issue of "marine gear oils" most standard brands are car gear 80-90 or 80/90 multigrade made by other petrol Companies and recanned to their own brands. As long as you don't have water leaking into the gear box that will ruin your gears if you are not aware of the problem, will perform exactly the same, have been using Chevron Multigrade Gear 80/90 Oil for the past 12 years with no prob at all. Change the oil every 100 hours max. I change mine each 50 hours.

Happy Boating
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Old 21 September 2008, 16:00   #6
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...As long as you don't have water leaking into the gear box that will ruin your gears if you are not aware of the problem, .......Change the oil every 100 hours max. I change mine each 50 hours.
Would it not be better to just use proper marine grade gear oil which is designed to cope with a water leak and change it every 100 hours as recommended than use the inferior product and change it twice as often.

Doesn't need to be the OEM brand but it does need to be marine grade.
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Old 21 September 2008, 16:12   #7
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Would it not be better to just use proper marine grade gear oil which is designed to cope with a water leak and change it every 100 hours as recommended than use the inferior product and change it twice as often.

Doesn't need to be the OEM brand but it does need to be marine grade.

Absolutely, I work with a lot of gear oils in a lot of environments, and the tech that goes into the marine stuff is quite different, visibly so,.. if you dip your finger in it, you can lift up tiny wisps of it, like silk, so its tactile characteristics are very specialised, and are designed to perform uniquely in a marine environment... Best get the right stuff
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Old 21 September 2008, 16:12   #8
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Would it not be better to just use proper marine grade gear oil which is designed to cope with a water leak and change it every 100 hours as recommended than use the inferior product and change it twice as often.

Doesn't need to be the OEM brand but it does need to be marine grade.
What would be a "Marine Grade" it's not specified in any marine can have seen so far. That I know standard gear oils are 80-90 / 120/130 grade or both in multigrades. The purpose of changing mine is because the quart can cost just US 6.00 and can hold 3 oil changes, US 2.00 for each 300 CC oil change, ain't that very cheap indeed, and besides have fun changing it. This is my personall opinion, been using Chevron Oils for the last 12 years, but use whatever oil you think suits your engine & pocket best.

Happy Boating
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Old 21 September 2008, 17:06   #9
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Quote:
Originally Posted by Locozodiac View Post
What would be a "Marine Grade" it's not specified in any marine can have seen so far. That I know standard gear oils are 80-90 / 120/130 grade or both in multigrades. The purpose of changing mine is because the quart can cost just US 6.00 and can hold 3 oil changes, US 2.00 for each 300 CC oil change, ain't that very cheap indeed, and besides have fun changing it. This is my personall opinion, been using Chevron Oils for the last 12 years, but use whatever oil you think suits your engine & pocket best.

Happy Boating
Bigmuz7 is right.It's also for an old engine-and therefore the risk of water in the oil is much higher than on a new engine.
Besides,If you can't afford a tube of Quicksilver gear oil once a year you certainly can't afford to run a boat.
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Old 21 September 2008, 17:51   #10
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In the states many people uses synthetic gear oils becuase they are better than normal grades - especially in racing - they aren't "marine grade"!!!

Having spoken to the tech dept of a major oil supplier I was told that there is no difference - but not in so many words.............
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