1999 Johnson 150 Ocean Pro Cooling Question

[RDCAMIT]

Good evening
I have a question I would like to ask? I have a 1999 Johnson 150 Ocean Pro the question I have is when I run the engine on a hose with a muff, I get a good strong pee stream and everything seems to be running correctly, but I noticed that the water coming out the pee stream is cold and the heads are getting hot to to the point that you cannot keep your hands on them but they are getting very warm at the leaast. Is this an issue and if so what do I need to look at?
Thanks

 

[Lund_bC]

Re: 1999 Johnson 150 Ocean Pro Cooling Question

I also have this problem but the heads seem a little to hot to touch. I am going to change the impeller I guess or at least crack it open around the cooling areas, and this is all new to me so I hope it isn't to hard.

 

[boobie]

Re: 1999 Johnson 150 Ocean Pro Cooling Question

Both of you should go buy some cheap infared temp guns and check the mtrs that way. They may be normal.

 

[RDCAMIT]

Re: 1999 Johnson 150 Ocean Pro Cooling Question

My buddy has one and he is going to bring it over tomorrow and I will check it. What temp range should I be looking for?

 

[boobie]

Re: 1999 Johnson 150 Ocean Pro Cooling Question

After mtr is warm and at 900 rpm temp should be 140* +/- 15* F. At 5000 rpm it shouldn't exceed 160* F.

 

[RDCAMIT]

Re: 1999 Johnson 150 Ocean Pro Cooling Question

After mtr is warm and at 900 rpm temp should be 140* +/- 15* F. At 5000 rpm it shouldn't exceed 160* F.

OK just completed the run at 900RPM the temp range was 130 up to 182 but that was fluxuating the average stayed around 150-170 the water from the pee tube stayed around 88 ran for 30 minutes on muffs

 

[RDCAMIT]

Re: 1999 Johnson 150 Ocean Pro Cooling Question

Forgot to ask is this an issue I need to be concerned with

 

[boobie]

Re: 1999 Johnson 150 Ocean Pro Cooling Question

Put it in the water and then check it. Muffs lie.

 

[RDCAMIT]

Re: 1999 Johnson 150 Ocean Pro Cooling Question

I will try tomorrow afternoon, I did unhook the temp sending unit and shortend it out to the block whihc made the horn sound. Question I was taking the temp readings off each cyclinder heads but the plugs. Is that a good location for reading the temps or is there a better place to take these readings or does it really matter?

 

[boobie]

Re: 1999 Johnson 150 Ocean Pro Cooling Question

Take the temp readings off the top of the block just before the cyl heads.

 

[RDCAMIT]

Re: 1999 Johnson 150 Ocean Pro Cooling Question

Well of course it is pouring down rain here so I will try and get it run tomorrow.

 

[RDCAMIT]

Re: 1999 Johnson 150 Ocean Pro Cooling Question

Just back from my sea trails here is what happened. Got the boat in the water staarted right up everything was going good. I started out slow then increased the throttle up to 5K RPM and was cruising along about 5min my horn went off and my Chk Eng light came on. shut the motor down restarted idled a little bit advanced throttle to 5K again with the same results. Long story short after several throttle advances I would get the horn and light at 4.5K RPM, the last run I got the horn and light but I did not retard the throttle to see if I would get another light but I that happend was the horn stopped but the light stayed on. On the other attempts when I retarded the throttle the horn would stop and the light would go off.
Now this is what I have done to the motor bfore this began Changed Spark plugs, engine fuel filter, boat fuel/ water seperator filter, and the fuel line bulb. Also I did notice in the front of the motor under teh air box there was a grern with a white stripe wire the was not hooked up and I connected the two back together, don't know if that would have anything to do with the horn and light issue.
But On a finalo note I did get hot water coming out of the pee tube once the engine was warmed up and running, I did not get a temp reading as I really never got it up and running long enough at 5K.
So any help would be great.

 

[RDCAMIT]

Re: 1999 Johnson 150 Ocean Pro Cooling Question

I went out last night and purchased all new fuel lines going to change them out today and see what happens from there

 

[w2much]

Re: 1999 Johnson 150 Ocean Pro Cooling Question

I may be mistaken here but if you are running hot your hot light should light up. Check engine is another issue. Is your boat and motor both 1999?

 

[RDCAMIT]

Re: 1999 Johnson 150 Ocean Pro Cooling Question

YEs both are 1999 the funny thing is I was just asking about the pee water temp and never had any issues but now that I started messing with it I'm having issues. I don't think the temp is a problem, I was just wondering if it was normal for the pee tube water temp to be cold when running on the muffs. Then I just changed out a few minor items and now when I run TWO I get the horn and chk eng light which I have never had that happen before now. Go FIGURE

 

[RDCAMIT]

Re: 1999 Johnson 150 Ocean Pro Cooling Question

Update I just got all my fuel lines changed out so I when I get a chance I will put the boat in the water and try it one more time.

 

[bob johnson]

Re: 1999 Johnson 150 Ocean Pro Cooling Question

you might install some new thermostats, they are easy to change out in that motor...change them after the motor has warmed up, hopefully that will prevent them from breaking...they are plastic...

if you rev the motor to 1500 rpms does the temperature drop????

bob

 

[w2much]

Re: 1999 Johnson 150 Ocean Pro Cooling Question

Do you have a hot light? Is it lighting up?Which lights are lighting up? Check engine light?

 

[RDCAMIT]

Re: 1999 Johnson 150 Ocean Pro Cooling Question

Bob Johnson,
I have not tried to check the temp at 1500 RPM what will that indicate? I have looked at the thermostats and see they have a plastic cover plate which I have tried to unscrew but they will not budge I have not tried to loosen them with the motor warm, I will try that; do you know what size socket they are I have tried both standard and metric but they both seem to have a sloppy fit?


w2much: I do have a hot light on my dash but that one did not light off just the Check Engine light came on.

 

[bob johnson]

Re: 1999 Johnson 150 Ocean Pro Cooling Question

Bob Johnson,
I have not tried to check the temp at 1500 RPM what will that indicate? I have looked at the thermostats and see they have a plastic cover plate which I have tried to unscrew but they will not budge I have not tried to loosen them with the motor warm, I will try that; do you know what size socket they are I have tried both standard and metric but they both seem to have a sloppy fit?


w2much: I do have a hot light on my dash but that one did not light off just the Check Engine light came on.

running at 1500 should put more pressure behind the water flow.... at idle sometimes my motor runs a little warm..I give it rpms and the temps fall...because i am getting more flow.....

you should only use the exact socket in SIX POINT ONLY! that fits that plastic hex on the t-stat housing.

that housing comes off and it has an o-ring that seals the water, inside it is a spring that forces the thermostat itslef against a rubber seal in the head... at low pressure the t-stats holds back and seals water from entering the head...once it gets warm enough( about 145 degrees) the t-stat opens and allows some water into the head...

the outer spring that pushes on the t-stat body is for allowing the whole t-stat to come off the seal and allow a LOT more water to flow into the head!! its like a dual acting device.....

some guys have used gasket sealant on the threads and o-ring of the housing with the nut on it....so a warm motor might help you unscrew it....I have had one break apart.....soo...never do it in cold weather!! and slow steady force, no blows with a hammer!! and the warmer the better..heck even use a blow dryer if you have to!!

bob