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150 hp mariner 1997 model cannot get power head off

T

tgmcree

New member
I am trying to remove power he

I am trying to remove power head from 150 hp mariner outboard motor I have removed all attatching nuts 10 total and I cannot seperate the power head from the lower part of motor I think the studs are corroded in the exhaust housing any ideas would be appreciated I have tried penetrating oil and a pry bar
 
you have the manual right
do

you have the manual right
do u have a engine lift?
u might need to get a little wieght off the mid section to move it
 
I still cannot get powerhead t

I still cannot get powerhead to seperate from the engine I have heated around the studs with a propane torch i have a lifting ring in the flywheel and a portable engine hoist i applied enough pressure to move the motor on the attatching bolts and it still wont seperate
 
"Thomas,

The long studs usu

"Thomas,

The long studs usually get frozen in the exhaust housing. You can usually get the rear of the engine to move a bit. This enables you to cut the gasket away. Then you can reach in with a hacksaw blade and slowly cut through the long studs carefully. Then you will probably have to drill out what is left in the base of the block and install heli-coils. The studs in the exhaust housing can usually be driven out from the top. You might have to make a few cuts in the long ones as you drive them out.

Sounds like a lot of work, but if the studs are badly frozen it is the only way I know of to remove the powerhead.

Tony"
 
THANKS TONY THAT IS WHAT I SUS

THANKS TONY THAT IS WHAT I SUSPECTED .THE LONG STUDS ARE CORRODED IN THE EXHAUST HOUSING FROM SALT WATER USE I GUESS I HAVE NOT BEEN ABLE TO MOVE POWERHEAD AT ALL .I HAVE PRIED UPWARDS ON THE STUDS AT REAR OF POWERHEAD WHILE APPLYING PRESSURE WITH THE HOIST AHD IT HAS NOT MOVED AT ALL IF I COULD GET IT TO MOVE ANY I WILL CUT THE STUDS AS YOU ADVISED THANKS THOMAS
 
Thanks are you saying that i u

Thanks are you saying that i use an air chisel with a blount tip to try to move the studs in the power head with the hoist attatched up and out of exhaust hoshing . I worry about damaging things when i apply the air chisel have you successfuly done this? please advise
Thomas
 
"don't pry on anything, us

"don't pry on anything, use a blunt end and put that on the end of the studs. studs should have a nut on them to avoid damage. turn gun down and vibrate those studs, be carefull"
 
tried air chisel on studs with

tried air chisel on studs with no sucess i have not budged the powerhead at all with all my efforts front rear nothing will move very frustrated at this point
 
You can drill into the stud fr

You can drill into the stud from the side.Drill only the ones you suspect as being jammed.This will cut the stud and release the powerhead.Drill near the powerhead.
 
"Thomas,

Drilling a hole as

"Thomas,

Drilling a hole as mentioned is an option, but if you are going to do that I would prefer just taking a sawz-all and cutting through the spacer, being careful not to damage the upper mount assembly. You can replace the spacer easily once you get the powerhead off. It is a good idea to examine a new or used spacer first so that you can decide where to make the cuts.

Tony"
 
SUCESS I drilled a hole thru s

SUCESS I drilled a hole thru spacer cutting center studs power head came right off I then drove the cut portions out of the center housing I will need to replace this peice it is the one just below power head you say it is called a spacer MANY THANKS TO EVERYONE WHO HELPED
THOMAS
 
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