Merc 470, new waterpump/cam seals...few more questions.

[Newbie@boats]

I finally got the new seals in, all bolted back together, new t-stat.

I start the boat, runs great, no leaks, weep hole problem sloved, great.

Boat still creeps into the 180deg/190deg in my head thats over heating.

I have a few questions now, could it be I only put water in the system and NOT anti freeze? Could my pressure cap be bad?

Also when I run the boat on muffs what should the water look like from the muffs still splashing every where or almost looking like the hose is not on since the out drive should be sucking the water all up?

And yes the T-stat is in the right way, I read the manual. lol

Thanks

 

[nola mike]

Re: Merc 470, new waterpump/cam seals...few more questions.

yes, that's too hot. yes, it will still have water coming around the intakes with the hose on. no, running straight water won't cause it to overheat (but it will cause corrosion). the manual has a pretty detailed troubleshooting section for overheating.

 

[Newbie@boats]

Re: Merc 470, new waterpump/cam seals...few more questions.

I honestly think I am going to do the head gasket.

I have all the tools to do it, check the head for straightness, cracks..etc

Same with the block...

Going to be 80deg here this weekend was hoping i would be able to take it out, oh well.

 

[nola mike]

Re: Merc 470, new waterpump/cam seals...few more questions.

not sure why you keep refusing to follow the troubleshooting in the manual. i guess you can just keep throwing parts at it instead, maybe you'll get lucky.

 

[Eric 3.7LX Alpha 1]

Re: Merc 470, new waterpump/cam seals...few more questions.

You've had this issue since getting this boat? Maybe there's a blockage inline somewhere in the seawater side in a hose. with water on to the muffs try checking flow at various locations throughout the system by disconnecting a hose at a time and see how it looks. Maybe a earlier inpeller change by a previous owner had a broken blade and it is inline somewhere? They installed a new one trying to fix as well. How long does it take to creep up on the muffs?

 

[Newbie@boats]

Re: Merc 470, new waterpump/cam seals...few more questions.

Well I started it, let it idle, put all my tools away, talked to my neighbor, and put some more stuff away, I'd say about 20-25 minutes.

I do not have any problem trouble shooting for over heating I am just not a fan of doing it from a laptop, anywhere I could buy a Manual locally?

 

[solar7647]

Re: Merc 470, new waterpump/cam seals...few more questions.

When you are running it on muffs, do you have water comming out of the exshust?

If not sure put the drive up, water should be comming out of exshust outlet in bellhouse.

If you dont have water coming from the exshust then your pump in your outdrive is bad.

Did you put the proper amount of water in the cooling system. It should hold 11qt.

 

[billy4hp]

Re: Merc 470, new waterpump/cam seals...few more questions.

not sure why you keep refusing to follow the troubleshooting in the manual. i guess you can just keep throwing parts at it instead, maybe you'll get lucky.

I believe he/she is 17 years old or so and looking for instant gratification... You can lead a horse to water but can't make them drink scenario...

Well I started it, let it idle, put all my tools away, talked to my neighbor, and put some more stuff away, I'd say about 20-25 minutes.

I do not have any problem trouble shooting for over heating I am just not a fan of doing it from a laptop, anywhere I could buy a Manual locally?

Why not just download the manual and print it if you need a hardcopy?

 

[nrob84]

Re: Merc 470, new waterpump/cam seals...few more questions.

for what its worth, i have the same motor, i live in ri, if you want i do side work at the house, ill diag it for you if you wanna drive it up here. but check these first, i had these problems when i got mine, look at the lower half of the outdrive, see the inlet where you put the muffs, unscrew that cover on the inlet, and look to see if there is rubber peices in there, if so take them out and you need a sea water pump, real easy to do. if none in there, put the muffs on, turn the water on and look inside the boat at the heat exchanger, is it leaking? the plug in the bottom of mine was missing AND the end cap was loose. if so fix the leak. if not start the boat, get out and stand behind the boat, if your looking at the BACK of the boat to the right of the outdrive on the gimbal housing (metal part between outdrive and fiberglass boat) there is a hole about 1 inch in diameter, there should be a good amout of water spraying out of it... if not you have a clog in a hose or you need a sea water pump. LISTEN, DONT rip your motor apart, your going to cause yourself more problems and cost yourself money you should be spending on a wakeboard, fishing polls, etc. dont be rediculous, listen to the guys here they know what there talking about, and will save you alot of problems! ill bet you money its not a head gasket if you dont have coolant in your oil, blowing TONS of steam out the back, or hydrolocked motor.

 

[Newbie@boats]

Re: Merc 470, new waterpump/cam seals...few more questions.

Whats a sea water pump?

 

[solar7647]

Re: Merc 470, new waterpump/cam seals...few more questions.

Whats a sea water pump?

There is a pump in the drive unit, it sucks in lake/river/sea water and sends it up through the drive into the boat and through the heat exchanger. As the coolant goes through the heat exchanger it passes its heat to this water and the water is sent back to the lake/river/sea through the exhaust.

 

[badkins50]

Re: Merc 470, new waterpump/cam seals...few more questions.

Hopefully you can see the attachements, if not go to my iboats album to see what the water pump looks like on the same lower unit as yours. I had to replace mine after I bought the boat. It was my first time doing it and it's not as bad as it looks. Get the right directions and follow them or you will be scratching your head . Good luck.

 

[Newbie@boats]

Re: Merc 470, new waterpump/cam seals...few more questions.

I did see the pictures and I did already replace that, the one I took out already looked new. I am going to check for any blocks in the cooling hoses today or tomorrow and see what happens.

Is that the sea pump? in the lower end of the out drive?

 

[nrob84]

Re: Merc 470, new waterpump/cam seals...few more questions.

yes thats your sea water pump in the lower half of the out drive, make sure you look inside the plastic cover where you put the muffs on to make sure there isnt anything in there, should be clear of anything. also check the heat exchanger for leaks as i said before if the sea water is draining into the boat it wont cool the motor enough and it will runn hot...

 

[Newbie@boats]

Re: Merc 470, new waterpump/cam seals...few more questions.

yes I did take the plastic covers off nothing in there at all, the heat exchanger has a few drips coming out of it. thats all.

 

[nrob84]

Re: Merc 470, new waterpump/cam seals...few more questions.

ok, with the boat running if you take a 5 gallon bucket and put it under the exhaust outlet on the right of the outdrive where 90% of the water is coming out, (with the engine running) how long does it take to fill the bucket? (so all of us here have an idea of where to send you next) mine takes no more then 3 mins.

 

[Newbie@boats]

Re: Merc 470, new waterpump/cam seals...few more questions.

Alright, I took some pictures just to make sure were talking about the right things.

I put a 5 gal bucket, and it didnt fill up, it got about half of a quater full.

I tryed to look for that water coming out of the back, took a picture to see if I was looking in the right spot.

Then the pressure cap, started shooting steam and water out of it, took a pic.

Then I noticed something around the rear of the motor. It was attached to the thing I fill with water, with the pressure cap, it had like a rubber coupling connecting them both, that was bubbling.

Loosing hope on this boat....Almost time to sell, and buy another, hopefully we get this figured out.

In the picture #1 is where it was bubbling from the coupling looking thing.

#2 is there where I should see water coming out of?

As you can see the 5 gal bucket right spot?

thats what happened to my pressure cap at the boat got past 160deg

http://i298.photobucket.com/albums/mm270/lilpimpinkkidd_2008/Boatmotor2-1.jpg

 

[solar7647]

Re: Merc 470, new waterpump/cam seals...few more questions.

#1 is the return hose for the raw water...after the water is sent through the exchanger that tube spits it into the exhuast and out of the boat.

Yeas the bucket is in the right spot.....No water means the water pump in the lower unit is not working or bad.

You said in an earlyer post you changed it...are you sure you did it right?

 

[solar7647]

Re: Merc 470, new waterpump/cam seals...few more questions.

Your pressure cap started spiting and throwing steam cause the coolant isnt transfering heat to anything......That exchanger tube is just like a radiator in a car.

 

[Newbie@boats]

Re: Merc 470, new waterpump/cam seals...few more questions.

I am almost positive I did the impeller right, heck I could be wrong, maybe after I try to figure out everything inside the boat figured out ill pull the lower end off, wont hurt.

Now do you think the heat exchanger could be clogged? I took the front cap off never the back one and sprayed the hose inside of that...

What hoses should I check for something being clogged inside?


solar7647-you're helping me out a bunch thanks!