Modifying existing Pee function.

[Texasmark]

As I mentioned a couple of days ago (OB non repair disc), boy's 150 BM has the pee routed from the output of the stats (2). That forces you to wait for pee till the stats open.....not good.

Found out that the (a) 200 hp BM has strong pee from the start and after talking with the owner (forgot his name) I find out that he has the output of the cooling channel and the stats plumbed to the pee spiggot.....from the factory.
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Looking at the engine yesterday and noticed a 3/8 water line coming from the top/rear/center of the engine, immediately astern of the flywheel's safety cover, that routes down the starboard side of the engine and exits into the exhaust channel below the lower cylinder on that side. I assume that it is a vent to insure that air pockets don't form at the top of the engine causing spot overheat problems. I further assume that there is a constant flow of water out this port as long as the impeller is pumping.

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Gonna bet this is the line that the 200 has added to the stat line go get instant pee. Any takers on the validity of that assumption?

What I thought about doing, since we are relocating the pee spiggot so that it's easier to see from the helm, is to put 2 outlets on the side of the engine. One to tell you that the impeller is a pumpin and the other to tell you when your stat(s) open......course, thinking as I type, that's not all that great, as one could open and one could be stuck and you probably wouldn't know it till one of the OT sensors closed which is the same situation you'd have if you weren't monitoring stat output at all.

I think we will remove the tee from the stat output and if the hose is what I think it is (mentioned above) put it (the tee to the pee spiggot) in that line and just plum the stat output straight through to the exhaust with no tell-tale on it.

Comments, suggestions appreciated.

Thanks,

Mark

 

[j_martin]

Re: Modifying existing Pee function.

If the pee is coming from the stats, then it's warmed up enough to hit the throttle. I like that indicator.

Get it working, keep it out of the mud, and drive it.

 

[Laddies]

Re: Modifying existing Pee function.

Mark I think that your right on your thought, we have also drilled the thermostats to make it run right out the pee hole before the stats open

 

[ncfish1]

Re: Modifying existing Pee function.

Mark;

Read your thread with interest, but not sure what you're trying to accomplish by doing all the pipe changes?

There are two methods of verifying water flow through the water loop:
1) the tale-tale is there to indicate flow through the heads and t'stats (only).
2) The pipe at the top/center of the powerhead is the bypass to and through the water bypass circuits and poppett (fed directly from the impeller).

My 150's start out with a small flow from the tale-tale, but increase with water temp. increase. That's what it supposed to indicate (that the t'stats are operating). If you drill holes in the t'stats or bypass this loop in any way, you're going to have cold acceleration problems.

If you are wanting to better "verify" water flow, then leave the t'stat loop to do it's job and simply add a pressure gauge connection at the plug at center/top/rear of power head (under flywheel).

The gauge will respond fairly immediately to water flow through the bypass loop/poppet circuit.

You will be left with (2) diagnostic points.....no tale-tale- restriction in the heads or bad t'stats .... no or low pressue from gauge- pump or water tube problems.

I would also recommend a temp. gauge if you don't have one. This will tell you "overall" whats going on with the water loop.

Good luck.

Capt. Mike

 

[gss036]

Re: Modifying existing Pee function.

I agree 110% w/Capt Mike. Install a water pressure guage as indicated and a temp guage. "DO NOT" alter the water flow to the poppet valve, it will defeat the purpose of the poppet.
I know you are trying to get educated, but MAN!, you already have 2300 posts on the board, obviously you have leaned a lot by now.

 

[Texasmark]

Re: Modifying existing Pee function.

Thanks j. Hear you on waiting till things warm up. Beins you're from MN I can understand that...........especially on diesel farm tractors.

Thanks Laddies for your assistance. That's a thought and would give you all your info from one spiggot. Being in Texas it doesn't get all that cold here so the stats aren't as important as they might be in Canada or somewhere else in the northern hemishpere.

Thanks, Capt. Mike for the words and time to assist me. The gauges are a good idea, but this is a family rig and the dash has no room for other amenities.....but it is something to think about.

I guess you could get Jr. to watch a gauge (while at the helm) as easily as the spiggot, but anyone can see the spiggot; even the toddlers who love to taddle tale to mama about anything d .

I don't think there is any poppet on this line. It is just a right angle 1/2" male pipe plug to 3/8 hose barb adapter with one on both ends and a straight hose interconnecting. All I'm going to do is to add a tee and pipe some of the discharge water overboard. My 90 does have the poppet and stat and they are under a common cover on the water jacket cover (head covering). Different critter.

Thanks, Gary for the comments. I'm basically curious and it has paid off in my (past d ) professional career. On here, I am curious, not only for myself, but for others that visit this site and observe; seldom getting involved in our hashing around, and for those that hash with me.
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Best Regards,

Mark