2005 bravo 3 leak but no leak

[2009 stingray]

hey guy, i need some help. i got this boat with a bravo 3, the reservoir went low 2 times in the course of 2 days. i pulled the boast out of the water and it sat overnight with the drive trimmed down in the driveway., the next morning there was a stain at the tail end of the props. where the water would come out. and gear oil in the prop and in the prop shaft area when i pulled the props off. i thought, ok, definite leak. pulled the drive, drained it, pressure test , held @ 8psi, 5 psi,15 psi, 12 psi.
i can not get this dam thing to leak, its held pressure since thursday 5psi. i turn the shaft, shifted gears, no change. WTH?
any thoughts?
i did inspect the reservoir and hoses inside and out of the engine compartment, no issues found.

 

[alldodge]

Check the bilge

 

[2009 stingray]

Check the bilge

yeah i inspected all the parts inside the boat before pulling the boat and there is no gear oil leaks in the engine compartment and the bilge is clean.

 

[Lou C]

Try again but turn the prop shaft while checking pressure. When I check my OMC Cobra I use the shift rod to shift in gear while turning the drive shaft using soapy water on the seals. You might have to also do a vacuum test. The leak that was hard to find on this one was the water pump shaft seal. And is a common leak point on these. Fixed that one last year.

 

[alldodge]

yeah i inspected all the parts inside the boat before pulling the boat and there is no gear oil leaks in the engine compartment and the bilge is clean.

ok, check the lube hose between transom and bell housing

 

[Bt Doctur]

if you find it has oil on it ASK how to remove it first before you snap the plastic fitting

 

[2009 stingray]

ok, check the lube hose between transom and bell housing

all the lube hoses were inspected , inside and out and no leaks found. plus as i mentioned , there was oil on the prop and inside the prop shaft cavity when i removed the props. i am really stumped.

i have tried multiple times, at several different pressures to spin the input shaft and no change/l;oss of pressure. even changing gears, forwrd, neutral, reverse.

 

[2009 stingray]

if you find it has oil on it ASK how to remove it first before you snap the plastic fitting

bellows and reservoir hose were done last year, 2025, the hose was reinspected last week when the drive was pulled. no issues found with the hose.

 

[alldodge]

all the lube hoses were inspected , inside and out and no leaks found. plus as i mentioned , there was oil on the prop and inside the prop shaft cavity when i removed the props. i am really stumped.

The only way to get lube inside the exhaust side of the housing is it would be cracked or a seal is leaking. Try putting a 5 inch vacuum and as Lou mentioned rotate the prop shaft

There are 2 types of prop shaft seals, 2 seals facing away from each other, and a 1 piece dual seal. Both seals fit most of the B3's even if it didn't come with the dual seal

 

[2009 stingray]

The only way to get lube inside the exhaust side of the housing is it would be cracked or a seal is leaking. Try putting a 5 inch vacuum and as Lou mentioned rotate the prop shaft

There are 2 types of prop shaft seals, 2 seals facing away from each other, and a 1 piece dual seal. Both seals fit most of the B3's even if it didn't come with the dual seal

ok, ill check that next
thank you