8 hp Yamaha outboard question

[ian38_39]

Hi All,
I recently aquired an 8hp Yamaha long shaft outboard, the motor starts, runs and idles great but there is a hole of about 1 inch in diameter in the leg.

When test running both water and exhaust came out of the hole as it was above the water line in the tank, the tell tail also stops when the hole is left open, if I blank off the hole with my hand the tell tail is fine and all exhaust exits from the prop.
I assume that the hole is there to access the gear linkage bolts as it is at the bottom of the upper casingbut can anyone tell me what should be over it. there do not appear to be any fixing holes for a plate nor any thread in the hole to take a plug, is it just a rubber gromit or should something else be there?

Ian

 

[Drascomber]

Usually a rubber bung. Hole is used to access gear linkage when separating gear case from leg to get at water pump impellor.

 

[leomagill]

I have a yam 8hp on my dinghy, like Drascomber says it should have a rubber bung there to cover the gear linkage join, it will run much quieter with it in.

 

[steve28]

rubber grommet, i have known them to blow out when the engine coughs or back fires but only when they are old and tired.

 

[graham]

I had the exact same engine and the bung flew out on starting.Wrapped a bit of plastic from a drink bottle around it held on with gaffer tape as a temporary fix until a new one arrived.

 

[ian38_39]

Thank's all,

Now that I know what should be there does anyone know where I can get one from?

Ian

 

[tross]

For a replacement talk the the guys at BHG marine in Lymington.They keep quite a good range of Yamaha spares - 01590 613600