New to this and need some experience in solving the issues I’m having.
I have a 1982 Johnson 115hp, it’s over heating on muffs and in the water(was told to optest in water as the muffs don’t supply enough water sometimes) normal water temp from hose bib 80-98 deg f, water temp where boat will be used 64-80
it’s used in salt water/brackish, as of now I’m just trying to get it running right before I start really throwing to much money at it so I know if I just need to get something else.
I have already replaced the thermostats and water pump. It is moving water at least thru to the tell tale.
On muffs it will idle approx 2-3 min, in the water it will idle about 6-7 mins, solid stream from tell tale then, the stream spits and sputters steam and water very suddenly before it’s just steam blowing thru. The water temp during this will cycle hot and cold(ambient temp) just before the spit and sputter of the tell tale the temp spikes to a temp you can’t hold your hand under. The head temps(left and right banks top and bottom are only off by 3-5deg f) will slowing increase and spike as well during this. From what I’ve been looking at, is there is deflector hoses in the power head water jackets that direct the cooling water flow from inlet to outlet ports on the power head.
now my question/s
when these slip out of place and cut off the flow direction, is there a way to test to see which bank is having the issue, example: if I remove one hose at a time the goes from the head to the thermostat housing then start the motor just long enough to see the flow volume would this tell me which bank or anything really is having an issue.
next question is.
if it is not the deflector hoses what could it be?
testing I have done allready
thermostats open/close yes at 164 (tested in water bath)
thermostats removed from motor and housing reinstalled without valve body in place and tested with muffs and in water only gained 2 min on muffs before same issue and about 5 min in water before same issue
made restrict or plate to put in place where the valve body normally goes and did the same and ran it with same times before the issue started with the thermostats in place.
my goal is to get this running with out removing to much of the bolt ons until my gasket kit comes in but also don’t want to waste the gaskets unless it’s needed if that makes sense.
I have a 1982 Johnson 115hp, it’s over heating on muffs and in the water(was told to optest in water as the muffs don’t supply enough water sometimes) normal water temp from hose bib 80-98 deg f, water temp where boat will be used 64-80
it’s used in salt water/brackish, as of now I’m just trying to get it running right before I start really throwing to much money at it so I know if I just need to get something else.
I have already replaced the thermostats and water pump. It is moving water at least thru to the tell tale.
On muffs it will idle approx 2-3 min, in the water it will idle about 6-7 mins, solid stream from tell tale then, the stream spits and sputters steam and water very suddenly before it’s just steam blowing thru. The water temp during this will cycle hot and cold(ambient temp) just before the spit and sputter of the tell tale the temp spikes to a temp you can’t hold your hand under. The head temps(left and right banks top and bottom are only off by 3-5deg f) will slowing increase and spike as well during this. From what I’ve been looking at, is there is deflector hoses in the power head water jackets that direct the cooling water flow from inlet to outlet ports on the power head.
now my question/s
when these slip out of place and cut off the flow direction, is there a way to test to see which bank is having the issue, example: if I remove one hose at a time the goes from the head to the thermostat housing then start the motor just long enough to see the flow volume would this tell me which bank or anything really is having an issue.
next question is.
if it is not the deflector hoses what could it be?
testing I have done allready
thermostats open/close yes at 164 (tested in water bath)
thermostats removed from motor and housing reinstalled without valve body in place and tested with muffs and in water only gained 2 min on muffs before same issue and about 5 min in water before same issue
made restrict or plate to put in place where the valve body normally goes and did the same and ran it with same times before the issue started with the thermostats in place.
my goal is to get this running with out removing to much of the bolt ons until my gasket kit comes in but also don’t want to waste the gaskets unless it’s needed if that makes sense.