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Old 19 August 2012, 08:33   #1
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Mariner 30 Lower unit

Arghhh! This engine is driving me mad....

On the side of the lower unit are three small holes - much smaller than the drain/fill holes. Any idea what they are for? Gearbox oil is leaking from them, which doesn't seem right....

Turning the prop there is regular resistance, which doesn't seem good either.
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Old 20 August 2012, 15:13   #2
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Those 3 small holes are water drains, will see water exiting when using muffs or removing tail from water. You shure it's gearbox oil or it's combustion leftovers if being a 2 stroke motor ?

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Old 20 August 2012, 15:32   #3
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Quote:
Originally Posted by Locozodiac View Post
Those 3 small holes are water drains, will see water exiting when using muffs or removing tail from water. You shure it's gearbox oil or it's combustion leftovers if being a 2 stroke motor ?

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It smelt of gear oil and stained the stones it dripped onto. I'll take a sample and check it properly.

If only yet made all different lubricants,etc., very bright vivid colours all leaks might be easier to trace!

Thanks
Hugh
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Old 20 August 2012, 16:19   #4
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My 2 stroke engines sometimes leaks throw small hole located at lower leg, it's dark browm/black and gummy, but it's 2 strokes combustion leftovers. Check leg oil level if suspecting you have a leak somewhere or discard having water intrussion which generally turns gearbox into white looking oil.

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Old 28 August 2012, 03:31   #5
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Yep, it was gummy stuff.

A good run at WOT helped clean things out a bit.

The oil level is fine. I will ignore it!

Thanks
Hugh
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Old 13 September 2012, 09:07   #6
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Hi i had the same problem on my one motor its the seal on the gear selector, if you take the lower unit off u will see it at the bottom of the selector shaft it looks like a little Cv boot

Hope this helps
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Old 13 September 2012, 11:06   #7
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Yikes!

Thanks for the tip - I'll go and have a look.

Cheers
Hugh
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