Johnson 110 v4 outboard overheating on starboard side

[dunnmatthew99]

Please help. last time i took my boat out if over heating i pulled the thermostats off which one was stuck closed. i changed those and i changed the water pump out. started the motor left side was at 135 degrees and the right side was already up to 195 degrees. i pulled the head off to check for any water blockage it was fine. I pulled the thermostat housing off again checked the new thermostats they were fine even swapped them from left to right, made sure the pin hole in the housing wasnt blocked and still running hot on starboard side. any suggestion would be amazing.

 

[interalian]

Did you make sure the rubber deflectors were in place and not swolen/shifted?

 

[dunnmatthew99]

i read about the deflectors online but when i took the head off i didnt see them

 

[racerone]

Need to go back in and install them !!

 

[dunnmatthew99]

ok i pulled the head off and pulled out deflectors one of them is triangle shaped and not round like the other ill try that

 

[dunnmatthew99]

[No message]

 

[dunnmatthew99]

so i changed the deflectors and its still getting hot on starboard side

 

[dunnmatthew99]

so new working thermostats, new water pump, new deflectors and still overheating on right side

 

[interalian]

Remove rubber hoses from bottom of heads. Idle motor. Does the same amount of water come out each hose connection?

 

[Jamull2852]

Im having the same problem on the 90hp, same amount of water flow comes out the heads into the thermostats. New pump kit, thermostats, rubber divertors, head gaskets, next step is checking water intake tube then running vinegar through the motor. I have the exhaust manifold cover off and tom. I will try running some weedeater string through each passage, and blow with air.
Oh and my water pressure wont get over 11

 

[dunnmatthew99]

i took the hoses off going to thermostat housing and ran the motor at idle the port side had way more water pressure than the starboard side so this is obviously why my motor is running hot on one side. What is causing this lake of water flow on starboard side. Thanks to all that help.

 

[interalian]

Port side being lower, you would expect a bit less flow when there's nothing to restrict it (thermostats, poppets). If you partially plug the port side does the stbd side get better?

 

[dunnmatthew99]

i plugged up the port side partially and it didnt seem to make a difference with the water pressure on the starboard side

 

[interalian]

In that case you have a blockage somewhere on the stbd side. The way the water flows on these is:

Pressurized water comes up from the pump, passes through the exhaust cover first, then into a large area between the cylinder banks. It then flows out under each lower cylinder through a large slot, then around the cylinders, directed by the rubber deflectors. There's a bleed hole above each upper cylinder to prevent airlock. After making the 'figure 8' circuit around the cyllinders, it flows through the slot in the the head gasket (lower outside corner), then into the head, up the head around the combustion chambers, then out the top into the water cover where it meanders around the spark plug area, then down and out the bottom fitting.

If you have much less water on stbd, you have a blockage somewhere between the bottom of the crankcase and the outlet port. Question is where? You mentioned the deflectors have been replaced. At this point you're looking for a blockage, maybe in the slot under the bottom cylinder (#3).

 

[dunnmatthew99]

thank you i will check it out appreciate the help

 

[dunnmatthew99]

if you dont see any visible blockage with the head off is there an easy solution to try and like snake the system or clean out the areas i cant see. if not what would you start taking off first

 

[interalian]

Can you see under the bottom cylinder? The water inlet there is about an inch and a half wide. Post a picture showing both water deflectors in place.

Was the head gasket on correctly?

 

[dunnmatthew99]

[No message]

 

[dunnmatthew99]

[No message]

 

[interalian]

That slot doesn't look blocked, does it?