Questions on Mercury 9.9 Bigfoot

[keithf]

Hi experts, I recently bought a new to me boat with a 2006 Mercury 9.9 Bigfoot 4-stroke outboard - serial 0R075887.

I am going thru and doing the maintenance before I use it. I reviewed the owners manual and have some questions I hope you can answer:
.

When running it on water muffs hooked to a garden hose, water streams out of the hole just below the lower-unit gear lube level screw - what is this a sign of? The telltale is working.

Is there an oil filter in this unit? If so where is it? The online manual mentions one, but I can't locate it so I suspect the manual is for a newer model.

Does someone have a pointer to a service manual? I tried the forum sticky post with no luck as they seemed to be for older models or 2-strokes.​

Thank you in advance, and happy boating!

 

[hardwater fisherman]

For a manual try Boatinfo.com.. The hole in the lower unit is probably a drain and not to be plugged.....When you shut down the motor it should continue to drain....

 

[hardwater fisherman]

I believe your oil filter should look something like this....

 

[racerone]

Not all small 4 strokes have a filter.--------There are several versions of 9,9 Mercury 4 strokes.

 

[hardwater fisherman]

Yea I guess I should of said if there is a filter then it should look like this....I did look at the manual for a 9.9/15 bigfoot and it showed a filter...But as you said it may not be the same motor...

 

[keithf]

Hi Guys, thanks for the responses - appreciated!

I did look at the single 9.9 4-stroke manual I found on boatinfo - boatinfo.no/lib/mercury/manuals/8-99.html - it is from 1996 and shows the lower unit fill/drain, etc in a different place to my unit - it also shows an oil filter which I don't seem to have - and it does not cover the extended length lower unit of the bigfoot.

So hoping some-one has a link to a more recent service manual applicable to the 2006 bigfoot 9.9?

Looking at brunswich marine's website, I believe OB-SM-035 is the manual that might help - anyone have a pdf copy to share/link to one?

Thanks.

 

[hardwater fisherman]

On the Boatinfo site there is a 9.9/15 bigfoot four stroke manual just to the right of the 8/9.9 four stroke manual..... You need to scroll sideways.....There is a little grey line under the manuals that you slide across....

 

[Yegboats]

4 stroke 9.9 323cc engines from 2001-2004 used an oil filter
4 stroke 9.9 209cc 2005- Current don't have oil filters. (Yours is a 2005)
You may see an oil filter in the service manuals because most service manuals will cover the 9.9 and 15 and all the 15 hp have oil filters.

 

[keithf]

Thanks Hardwater for the pointer on the bigfoot manual on boatinfo - great!

Hi Yegboats, thanks for the oil filter info. as well as the water flow diagram - that helps!

See attached pic of water flowing out the hole just below my gear lube level screw when running on muffs - I do not see it shown in your diagram - any ideas - is this normal, or a sign of something that needs repair?

Thanks!