Mariner 5hp gasket help

[gas0lean]

Greetings,<br /><br />I'm new to this board and have never posted an image so sorry if I post incorrectly.<br /><br />I have a Mariner 5hp air cooled outboard that runs beautifully. I'm not sure of the age/model etc.. as I don't have a manual for it. This is whats on the side.<br /><br />Mariner 5<br />661 S 014071<br /><br />

<br /><br />However the main problem is I noticed a gasket at the back of the motor that seems to be seeping brown goo. Would you guys be able to tell me just what gasket I need and a few hints & tips on replacing it?<br /><br />

<br /><br /><br />Any help would be greatly appreciated. Thanks.<br /><br /><br />gas0lean

 

[WillyBWright]

Re: Mariner 5hp gasket help

What a curious motor! Never saw one like that. It looks like it has a jug below the cylinder head. It looks like some black stuff at the base gasket. What's that appendage below the cylinder, an expansion chamber? I know it says Mariner but I wonder who made it.

 

[Keith Buchanan]

Re: Mariner 5hp gasket help

Looks like a Yammy/Mariner

 

[Winger Ed.]

Re: Mariner 5hp gasket help

'Goo' on the outside is OK for a 5 horse or even a V-6.<br /><br />However, Fresh gas and oil outside the engine could be a problem.<br /><br />I think you should just boogie on until it pukes.

 

[gas0lean]

Re: Mariner 5hp gasket help

Thanks for the replies, I've run out of time now and am flat out back at work so she'll just have to wait a few more months.<br /><br /><br />gas0lean

 

[Paul Moir]

Re: Mariner 5hp gasket help

WillyBWright - that appendage is the exhaust manifold. You're not seeing the part where it attaches to an obvious spot on the cylinder.<br /> Whole picture, click here.<br /> <br />Looks like a little exhaust leak there. Not much to worry about, but a couple new gaskets from your merc dealer are cheap and the fix should be easy if the bolts come free. The gasket should be 27-82942M for the exhaust housing side, and 27-80042M for the head side.<br /><br />Your engine is a Yamaha built 1974 model, by the way.