blackmax xr2 not peeing at idle normal?

[msn26753]

Sorry, I do not have a model number nor a year.. Shame on me. But I have a Mercury Blackmax xr2 later 1980's maybe 88 model. The guy I bought it from says he just replaced water pump less then a month ago. Everything runs good except there is no pee at idle. As soon as I throttle up it starts peeing. I asked him and he said that was normal, it had something to do with the thermatstat not opening yet. But temperature gauge does not work. The buzzer doesnt seem to work either. It does not chirp or buzz when I turn power on. In the motor there is a tan wire on bottom that goes no where. Looks like it got disconnected. There is a tan and blue wire (assuming temperature gauge) and a tan wire that is connected to a screw at the top of the motor. I do not know where this other Tan wire is comming from. Both Tan wires are going into a bunch other wires in sleeve and I can not see where they go, assuming to the gauges. Anyhow, Bigest question, I gotta make sure I dont burn this thing up. Is not Tell Tale or peeing at Idle really normal? I ran it off of the muffs for a good 10-15 minutes, and kept touching the block to see how hot it was getting. I could always touch it, but it did get hot enough to not want to leave your hand on there too long. Also, when you rev it up, it starts peeing and the block seems to cool down... Any info would be awesome... thanks..

 

[jestor68]

Re: blackmax xr2 not peeing at idle normal?

The short answer is yes, there should be water coming out the tell tale at idle.

 

[Dukedog]

Re: blackmax xr2 not peeing at idle normal?

Not necessarily. It is pretty much controlled by tha T-stats. Most stats have a tiny by-pass "notch" that will let it dribble a tad. But for whatever reason tha motors will differ a little when it comes ta idle discharge. This is just another reason tha pressure gauge is a must have. Has tha oiler been removed? if it has that would be tha reason for no beep when ya start it. Its tha only reason for tha start up beep. You need ta test tha warning buzzer. Ground tha tan/blue, tan terminal. Should give ya a beep. Tha tan that's not connected to anything should be for a "temp" gauge. Tha temp gauge sensor will be on tha port head between number two and three cylinders. Looks like tha over heat sensor except number of wires IF its tha later model with one piece heads.............

 

[Faztbullet]

Re: blackmax xr2 not peeing at idle normal?

It will "pee" b etter when in water than on hose....

 

[Dukedog]

Re: blackmax xr2 not peeing at idle normal?

This might be a good place ta bring up something 'bout tha cold motor stream. When a cold motor is revved just a tad to "test" for discharge tha stronger stream has nothin' ta do with stats. You also have a discharge from tha adapter plate tha ties into tha same stat discharge thus tha reason for a strong stream when revved a little when "cold"............Again for some reason or another this will vary on these motors...............

 

[msn26753]

Re: blackmax xr2 not peeing at idle normal?

Thabks everyone so far.. what do you ground out to test buzzer.. I tried to post a pic but couldnt figure out how.. the tan wire with blue line is connected to a screw on starboard side engine with 1 tan wire. The other end of the tan blue wire is connected between the cylinders.where and what do I griund out.. Also the water that pees when I rev up is real warm.. the cylinder hwads get hot but I can touch them, should the thermastats be opening by then?

 

[Dukedog]

Re: blackmax xr2 not peeing at idle normal?

Turn tha key on. Use a jumper wire from tha screw holding tha two wires to tha terminal ta battery ground (or anywhere on tha block). Unless they have been changed tha stats should open at 143 degrees...........Like Fb says also.

 

[msn26753]

Re: blackmax xr2 not peeing at idle normal?

Ok.. I ran jumper from negative to screw. I have to touch both screws and alarm will sound..does that sound right, that negative wire has to touch both screws? Also, if I wanted to hook my temp gauge back up, where does that wire connect to?

 

[Dukedog]

Re: blackmax xr2 not peeing at idle normal?

Both screws? Aren't both wires under one screw on tha plastic term and one screw holding tha term block against tha block?

 

[msn26753]

Re: blackmax xr2 not peeing at idle normal?

Yes.. exactly.. I dont understaand why I have to lay ground wire to touch both screws for alarm to sound..

 

[Dukedog]

Re: blackmax xr2 not peeing at idle normal?

I am havin' a time visualizing this one! Does it sound if you jump between tha 2 screws? It should. Does it sound when you only ground tha screw holdin' tha two wires to tha term to tha block and/or battery ground? Confused......

 

[msn26753]

Re: blackmax xr2 not peeing at idle normal?

I took a wire and screwed it to neg on battery.. the other end of wire I touched screw that has 2 wires (tan and tan and blue) and buzzer does not sound. When I touch other screw I get no sound either. But if I touch both screws at same time with one end of wire and the other end to neg on battery, I get a buzz...

 

[racerone]

Re: blackmax xr2 not peeing at idle normal?

Correct , when you touch both screws you are going to ground and alarm will sound !

 

[Dukedog]

Re: blackmax xr2 not peeing at idle normal?

Only thing I got, if I'm understandin', is a bad sensor on tha motor...........Is there ONLY ONE wire coming outta tha sensor on tha head?

Now for your gauge ta work there has to be a sensor on tha port head, same place as tha heat sensor on tha starboard. It will have a ground and a Tan or tan/blue wire comin' out of it......That tan or tan/blue will make up with tha tan stickin' outta tha harness at tha plug......

 

[Dukedog]

Re: blackmax xr2 not peeing at idle normal?

Forget about tha screw holdin' tha term block to tha block. You should only need to ground tha screw holdin' tha two wires to tha term block to anywhere on tha block/neg to tha battery/any "black" wire screwed to tha block or anywhere else and produce a buzzer. If its not doing that then tha buzzer is broke, which its not, or tha sensor is bad...........There is absolutely no way that ya should need contact with "both screws AND tha neg on tha battery" ta get an alarm. It should alarm with only a jumper between tha two screws and nothing else........

One other thing shoulda got ya to do earlier. Separate tha two wires completely from each other and tha terminal. With tha key on ground tha one comin' from tha harness. Should get tha buzzer.........This eliminates everything from tha terminal to tha buzzer as a problem.

 

[Dukedog]

Re: blackmax xr2 not peeing at idle normal?

Correct , when you touch both screws you are going to ground and alarm will sound !

Read this again. That's not what hes sayin'. Or am I just more dyslexic than I know......

I took a wire and screwed it to neg on battery.. the other end of wire I touched screw that has 2 wires (tan and tan and blue) and buzzer does not sound. When I touch other screw I get no sound either. But if I touch both screws at same time with one end of wire and the other end to neg on battery, I get a buzz...

 

[msn26753]

Re: blackmax xr2 not peeing at idle normal?

Ok.. im getting confused now.. so if the buzzer sounds when I touch neg wire to both screws means what? How do you check sensor?

 

[msn26753]

Re: blackmax xr2 not peeing at idle normal?

Ok.. im understanding about the key to ground now.. on the port side of the motor there is no sensor on valve cover.. thats where temp gauge should go.. if im understanding correctly... now how the heck could I check the sensor on the starboard side?

 

[Dukedog]

Re: blackmax xr2 not peeing at idle normal?

sent ya a pm.............This might help.

All tha sensor is is a bi-metal switch that closes tha GROUND side of tha warning buzzer when it heats up ta 190/210 roughly degrees. Turnin' on tha key sipplies tha hot side to tha buzzer. Does that help?

 

[sam am I]

Re: blackmax xr2 not peeing at idle normal?



The sensor on the port side (by factory) is the tan wire w blk grd wire and goes to a temp gauge and is a linear sensor[unlike the bi-metal or "snap" type like the starboard side(by factory) duke mentioned to you that is the tan/blu w NO ground wire/spring pushes sensor body to gnd)] in that this one's resistance varies (from the tan lead to the blk lead) inversely proportional to temp.

Test port side by heating it up one way or the other and either watch your gauge with the key "ON" or, use a ohm meter and measure across it as you heat it up. It should be around 700 Ω's @ 70 or 80 degrees F and go down in resistance as it is heated up.