Re: Calling all Merc Mechanics
 

rmb, there is hose that goes on the top barb to your carbs. i think it might be vacuum related. hope the following pics help.

t stat, like you thought
http://i40.photobucket.com/albums/e2...boardtstat.jpg

other side
http://i40.photobucket.com/albums/e2.../porttstat.jpg

barb fitting

http://i40.photobucket.com/albums/e2...ddy/motor2.jpg

hose linking carbs

http://i40.photobucket.com/albums/e2...ddy/motor3.jpg

Re: Calling all Merc Mechanics
 

rmb, there is hose that goes on the top barb to your carbs. i think it might be vacuum related. hope the following pics help.

t stat, like you thought
http://i40.photobucket.com/albums/e2...boardtstat.jpg

other side
http://i40.photobucket.com/albums/e2.../porttstat.jpg

barb fitting

http://i40.photobucket.com/albums/e2...ddy/motor2.jpg

hose linking carbs

http://i40.photobucket.com/albums/e2...ddy/motor3.jpg

Re: Calling all Merc Mechanics
 

This is shot showing the linked carbs a little better


http://i40.photobucket.com/albums/e2...ddy/motor4.jpg

Re: Calling all Merc Mechanics
 

This is shot showing the linked carbs a little better


http://i40.photobucket.com/albums/e2...ddy/motor4.jpg

Re: Calling all Merc Mechanics
 

The first picture of your last post, were you say " there is hose that goes on the top barb to your carbs" your thermostats is were your thumb is pointing. See the sensor wire to the alarm.

Re: Calling all Merc Mechanics
 

The first picture of your last post, were you say " there is hose that goes on the top barb to your carbs" your thermostats is were your thumb is pointing. See the sensor wire to the alarm.

Re: Calling all Merc Mechanics
 

run it first without any see if it fix's the problem like MJ said. then replace if it runs good with none. that was the location you posted in those pics i had an old V4 140 that ran hot all the time with t-stats but ran fine without so you can guess it i took them out never had the first problem.

Re: Calling all Merc Mechanics
 

run it first without any see if it fix's the problem like MJ said. then replace if it runs good with none. that was the location you posted in those pics i had an old V4 140 that ran hot all the time with t-stats but ran fine without so you can guess it i took them out never had the first problem.

Re: Calling all Merc Mechanics
 

it might be some sort of a pcv valve ???


The poppet valve is located underneath the bottom of the powerhead on the intermediate housing. you have to remove the lower cowling pan to access it.

Re: Calling all Merc Mechanics
 

it might be some sort of a pcv valve ???


The poppet valve is located underneath the bottom of the powerhead on the intermediate housing. you have to remove the lower cowling pan to access it.