where is the upper main bearing vent ?

bob johnson

Rear Admiral
Joined
Feb 25, 2009
Messages
4,306
I did some work on my motor and with the airbox off , I noticed the hose that feeds into the back of the airbox up top has a T in it...one end is connected to the recirculating valve( I think thats what it is called) the other end is loose.

The manuals diagram shows it to go to the upper main bearing vent....

but I cant find any place in the manual that says or shows what and where the main bearing vent it...

i took a picture of my 90 hp's crank case cover..and it has a few vents...

can anyone describe or show a picture of where this hose connects( the one T'd off the hoses from the airbox and the recirculation pump)

here is a picture i took last summer...at the very top is a fitting with no hose on it...is that the UPPER MAIN BEARING VENT??

zivxac.jpg


the picture of the V4 in my manula has that hose going downward from the recirculating pump just to the right of the starboard carbs . I can still see it as it drops below the top carb...

thanks

bob
 

bob johnson

Rear Admiral
Joined
Feb 25, 2009
Messages
4,306
Re: where is the upper main bearing vent ?

never mind......good thing it wasnt an emergency!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

bob
 

samo_ott

Vice Admiral
Joined
Jun 18, 2006
Messages
5,125
Re: where is the upper main bearing vent ?

I dont know the answer but was just wondering if you figured it out?
 
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