engine loads up with oil

[THEFERMANATOR]

The most common cause of what your talking about with an oil injected MERC is overfilling the oil injection tank. When you shut the engine off with an overfull oil tank, it will push oil back up into the crankcase through the hose used to pressurize the oil injection tank. My flats boat used to do this because the oil tank didn't set level, so you couldn't fill it up but to about 80% without it pushing oil back into the crankcase when you shut it off.

[steplift20]

hmm ill take notice to that
my oil tank is full to the top
i hope thats all thats wrong
thanks

[THEFERMANATOR]

NEVER fill a MERCURY tank to the top or else it will do exactly as your describing. You need to leave an inch or so of space below the tubes that send crankcase pressure to the tank from the engine.

[phatdaddy]

ferm or spare can confirm this, but i think there is an adjustment screw on the oil pump. i will check my manual for the specs.

[THEFERMANATOR]

Originally Posted by phatdaddy

ferm or spare can confirm this, but i think there is an adjustment screw on the oil pump. i will check my manual for the specs.

You can adjust the linkage to the set marks if they aren't aligned. The oil pump should only flow when it is being turned, when it is stationary it takes ALOT of pressure to flow oil through it.

[phatdaddy]

step, according to my manual,v-135 thru v-175 ser#c221500 & up,

flow specs
2.0 @1500RPM w/ oil pump link arm CONNECTED = 6.8 cc + or- 10% in three minutes
@1500RPM w/ oil pump arm DISCONNECTED = 17cc + or - 10 % in three minutes

2.4 @ 1500 RPM w/0il pump arm CONNECTED = 8.2cc + or - 10% in three minutes
@ 1500RPM w/oil pump DISCONNECTED = 19.2cc + or - 10% in three minutes

you check it by running the engine on PREMIX and disconnecting the clear tube going to the fuel line tee from the oil pump. block off the oil inlet in that tee and dump the oil in a measuring cup. kinda a pia, but you might be over oiling.

out of the 5 or 6 I have ever checked, i've never found one out of specs.

but you never know, if you want to try it, pm me your e mail and i'll try to scan the page and send to you.

[steplift20]

thanks for all the advice, the only thing that has me confused is that i own the engine for about 18 years and only recently i am having this problem and i do the same thing all the time i all ways topped off the oil tank during off season, i think im just going to get rid of the system and premix, i also have a 50 merc that is premixed and she never gave us a problem , and you know when i will have the problem, when im getting ready to go out and she doesnt start, probably have my wife with me and she doesnt come often she will think i had this all planned