1997 Mercury 115 HP 2+2 motor

[Johnson110]

I have 2 cycle oil leaking at the base of this engine after it is shut off, oil leaks then stops. Is there a seal that is bad what can cause the leak?

 

[racerone]

There is an oil recirculation hose that goes from bottom of engine to the top bearing area.---Possibly ruptured -----Look for it and replace it.-----That is my best guess from 1000 miles away.----I can not see / inspect the motor.

 

[Johnson110]

Interesting thanks I will check that !

 

[Johnson110]

Ok so where can I get the OEM service manual for this motor serial 0G485647 115 EXPLTO mercury engine, Ebay does not have this serial number cannot find it any suggestions?

 

[Johnson110]

Anybody?

 

[Johnson110]

Ok then I will take the lower cowling off run the motor and see if I can pinpoint the oil leak!

 

[mgjtkt]

I bought one for a 1994 model from Mercury Marine. mine was about $90 7 years ago

 

[flyingscott]

You need to take your serial # to get the part # of the manual.

 

[Johnson110]

Yes I have that number OG485647 115 EXPLTO , cannot seem to find one.

 

[flyingscott]

Call a dealer they can help you

 

[Johnson110]

I got a manual and tighten the bolts down now I ran the engine for the first time on muffs after winterize. The number 2 cylinder plug is black, so I performed a compression test on the cylinders all 120 psi. The plugs have not been changed for 3 years they are NGK BP8H-N10, The cylinder all have good spark the number 2 plug is dry and black someone had used a heilcoil in that cylinder so I cannot switch plugs with another cylinder, could the plug be just bad tried cleaning it up and put it back in same thing cylinder missing

 

[Johnson110]

Ok so I got the spark plung thread insert off plug. How do you find out out what size thread the hole is in the block the out insert is messed up tried a m14 insert which threaded on to plug nice but will not thread in to spark plug hole. Please any help with this?

 

[Johnson110]

Is there such a threaded insert that has M14 on spark plug and M16 on spark plug head?

 

[Johnson110]

Found out that's its a KD tool 2127d 7/16 reach, I now can change the plug!

 

[Johnson110]

I put the spark plug in and the engine runs good again !