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Old 21 September 2008, 10:42   #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, 11:54   #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, 12:17   #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, 14:05   #4
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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.
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, 14:46   #5
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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, 15:00   #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, 15:12   #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, 15:12   #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.

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Old 21 September 2008, 16:06   #9
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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, 16:51   #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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Old 21 September 2008, 16:59   #11
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- especially in racing -
not the same though. Racers generally run to the limits, with much more frequent routine maintainence. So (1) its not the end of the world to check / change the oil a lot in case of a leak (2) if there is a leak they probably aren't going for long until it is spotted (3) if there is a gear box failure they probably aren't going far from help (4) given the costs of racing, risking destroying a gear box from a water leak is not necessarily the end of the world.

Quote:
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.............
so you use a marine brand gearbox oil in your engines or car stuff? bear in mind that when you come to sell those engines the buyer may be reading this thread...
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Old 21 September 2008, 17:16   #12
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not the same though. Racers generally run to the limits, with much more frequent routine maintainence. So (1) its not the end of the world to check / change the oil a lot in case of a leak (2) if there is a leak they probably aren't going for long until it is spotted (3) if there is a gear box failure they probably aren't going far from help (4) given the costs of racing, risking destroying a gear box from a water leak is not necessarily the end of the world.

so you use a marine brand gearbox oil in your engines or car stuff? bear in mind that when you come to sell those engines the buyer may be reading this thread...
I have no intention of selling my lovely engines!!!

Most Landies seems to cope fine with standard EP90 and they are underwater quite a bit as well - and some of them even leak.........
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Old 21 September 2008, 17:38   #13
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I have no intention of selling my lovely engines!!!
what never? I thought you were planning to upgrade to a 300HP ?
Quote:
Most Landies seems to cope fine with standard EP90 and they are underwater quite a bit as well - and some of them even leak.........
mmm... I can see this turning into a Landrovers are crap thread if we're not careful! Here are some differences between a landrover and an outboard which spring to mind: (1) landrover spends most of its working life out the water (2) landrovers will almost always be stored out the water (3) landrover more likely to be in fresh (therefore less corrosive) water (4) engine speed and drive shaft speeds typically considerably less on a landrover (5) and probably most importantly, very low risk of fishing line destroying your drive shaft seals on a landy (6) a dead gearbox is unlikely to be life or death on a landy (7) larger gearbox on a landy so more oil, therefore a small water leak is less concentrated (8) landy probably gets more tlc/sees a mechanic more often than an average outboard. (9) if a leak does develop on a landy good chance it will not spend much time immersed before it is spotted and resolved.

Most outboards are probably fine with standard oil - as they don't have a leak. The point is when you get a leak in a bit of the engine that is always under water - you want to do everything you can to stop that becoming a crisis.
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Old 21 September 2008, 20:13   #14
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I can't believe that this is even worth debating given the minimal price difference of using something designed for the job vs any old tat from halfords.
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Old 21 September 2008, 21:01   #15
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I can't believe that this is even worth debating given the minimal price difference of using something designed for the job vs any old tat from halfords.
It's only because I hate it when people rip us off - it's funny how the makers who don't sell oils suggest using something generic!!!

Both Volvo and Enfield with the Z drive say that any quality gear oil may be used...........

It is NOT a matter of being tight. Just common sense. For example why buy Panadol for £2.50 when Tesco parecetamol costs 15p???
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Old 22 September 2008, 09:17   #16
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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.............
Cod you got both issues right, about that synthetic could be used and "there is no difference - but not in so many words" besides no Company will ever tell you that their oils are good quality recanned ones bought from reputed Companies. Is a must "marine" issue that has to be sold to clients.

As one stated, if cannot buy a can of Quicksilver oil, must not be boating, must say that Mercury/Mariner are no longer on the outboard bussiness down here, so no products available. So have to look for an alternative best transmission oil available. The quoted price is the final end distributer price, not street price, so cheap buy for me, doesn't mean it's poor lub quality. Feel free to use any lube you want to.

If you leg is water leaking, and not detected on time, no matter which oil you'll be using will ruin your complete gear box fast, so it's a good issue if you have the available time and know how to do it, each 50 hours, ckeck level oil if ok, add if needed, or detect milky oil. (you are a luky man, detected on time, time for minor gear box repair).

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