135 power stroke two not cooling

[fishtricker]

just bought a boat with a 135 power stroke two ran great for a couple of minutes but looked like it wasent shooting out water right ithink the two holes at the top then stoped all togther how do i check the cooling system ?

 

[emdsapmgr]

Re: 135 power stroke two not cooling

What year is the engine?

 

[fishtricker]

Re: 135 power stroke two not cooling

i think like a 73

 

[emdsapmgr]

Re: 135 power stroke two not cooling

That engine was produced before 1978 when the water telltale was developed. When your engine is started, some smoke may come out of those two exhaust relief holes at the top of the midsection. After 60 seconds, the thermostat (vernatherm) will open and a light water mist will start to come out with the smoke. It will accumulate on your hand if you hold it back there. That's normal. You don't expect an overheat, but there is a temp switch in the starboard head. If it gets to around 212, it should sound the horn in the control box. Unfortunately, there is not one in the port head that year. If you are really curious, you can rent a laser temp gun from an auto parts store and take it boating with you. The engine heads should idle around 130-150 degrees normally. The head temps will go down once you are on plane and the thermostat pressure relief valve opens.

 

[fishtricker]

Re: 135 power stroke two not cooling

ok that makes sense then it was working ok cause i put it in the lake and ran it around the lake for about 5 min ran great checked those holes and no water so i got scared and docked put my hand on the midsection and it was hot very hot couldent keep my hand there couldent hold it there for more then 6 seconds motor very hot too couldent it touch so i let it cool down for an hour and tried again it was hard to start and ran like poo so i turend right back to the dock mabey a two minuts tops pulled it out and have no ideah where to start trouble shooting just cadet thanks for any input

 

[fishtricker]

Re: 135 power stroke two not cooling

is the not being able to touch it normal? was it even over heating?could i have just fouled the plugs cause i ran it at 40 to one what is going on here? that was all my money for a boat and its sits on dry land been tryin to boat for years and always end up with my minn kota

 

[emdsapmgr]

Re: 135 power stroke two not cooling

You can start the engine in the water, then remove one of the hoses at the back of the powerhead. Where it goes into the thermostat housing. You should have water pumping out the hose. Reattach the hose, then check the hose on the other side. If you have water pumping, the impeller is ok. The engine can still overheat if the thermostat (vernatherm) is stuck shut. The only way to determine just how hot it is getting is with a laser gun or the old style thermomelt stick.

 

[ezeke]

Re: 135 power stroke two not cooling

You should be able to keep your fingers on the cylinder heads for a three count (no more or you may experience third degree burns) any time the engine is running.

 

[fishtricker]

Re: 135 power stroke two not cooling

so thing might have been cooling fine just running like poo is the lower unit spotta be hot too? i choked it out to turn it off before it started acting up

 

[fishtricker]

Re: 135 power stroke two not cooling

is there a tell tale water shoot out spot

 

[ezeke]

Re: 135 power stroke two not cooling

OMC did not have tell-tales installed on new motors until around 1977-1978. There is a thread on adding them in the Engine FAQ forum - cost you around $20. for the parts.

The exhaust relief at the back of the midsection should be spitting water when the engine is running, but not necessarily when on muffs.

 

[fishtricker]

Re: 135 power stroke two not cooling

ok so i changed the lower unit oil checked the plugs pulled the hose going into the engine block put the outboard on muffs and finnaly got it to start and water was pumping out of the hose put it in to the water ran aound at high speeds for a while 10 min or so parked for 30 min started again ran at med to low speeds for 5 min shifted into neuteral the motor kinda ran away and woundent run in drive nursed it back to the dock was VERY hot burning off paint andmelting wires took the hose again and ran it water did not come out of the hose just steam...... impeller or thermostat should i just change them both where can i get them if i need to and how bad of a job are they

 

[emdsapmgr]

Re: 135 power stroke two not cooling

You can have a great impeller and good water pressue to the powerhead, but if the thermostat is stuck shut, you can still have an overheat. It is also likely that the hot horn feature is not working on your engine. You may want to diagnose both the cyl head temp switch and the horn in the control box to make sure they are functioning properly. To be safe, change both the impeller and the thermostat (and check the pressure relief valve in the thermostat housing.) I'd check your compression on each cyl to make sure a head gasket did not fail during the overheat.

 

[fishtricker]

Re: 135 power stroke two not cooling

how do i get to the impeller and thermostat and where can i buy them

 

[ezeke]

Re: 135 power stroke two not cooling

At the top of this forum page are icons for J/E parts.

To remove the lower unit and replace the water pump you will need a water pump kit.

You will need to remove seven gearcase bolts from underneath, including one that holds the trim trab and the one hiding above it. Mark the trim tab so that you can replace it as it was.

You will need to disconnect the shift rod from below the carburetors. This is done by loosening the screw that forms the fulcrum of the bellcrank and spreading the bellcrank fingers to release the pin. There is a nylon bushing in the swivel at the top of the shift rod; try not to loose it.

It would be a very good idea to examine the waterpump before you order parts so that you get all that you will need.

 

[fishtricker]

Re: 135 power stroke two not cooling

do i need to pull anything else to get to the screw to reease the pin and is the thermostat in the thermostat houseing

 

[ezeke]

Re: 135 power stroke two not cooling

do i need to pull anything else to get to the screw to reease the pin and is the thermostat in the thermostat houseing

Depends on your tools and patience. I usually disconnect the control cables at the engine to get them out of the way.

Getting to the vernatherm to replace it is a real contest. It's best to have the replacement gaskets on hand as well as the vernatherm.

 

[fishtricker]

Re: 135 power stroke two not cooling

ok so i got the lower unit off opened the pump dont really know if its got problems the blades on the impeller are bent should they be thanks!

 

[fishtricker]

Re: 135 power stroke two not cooling

oh boy i think i found the problem i opened up the vernatherm houseing and the pressure valve wasent there or melted and the vernatherm valve was missing too!!!!!melted plastic through out pretty bad

 

[fishtricker]

Re: 135 power stroke two not cooling

i am haveing troublefinding the vernatherm gaskets or a kit and the pressure valve