tell tale reroute conspiracy..

[mortymolly]

Hey all...so i posted the thread recently that i re routed my tell tale stream from the lower water jacket maifold to the top of the #1cylnder ..and i am very pleased with how my 1987 70 hp evinrude . Is running....now here is my conspiracy theory...when i ask mechanics at different marinas..they look at me like i have 5 heads...they all shrug and say...nope...never heard anything about doing that fix....its almost like its an industry secret to keep it hush hush so when your motor gets air locked and you nurn up your no.1 cylinder,they will have future work....has anyone else reading this thread done this or is the joke on me ..

 

[toddschubert]

Re: tell tale re roite conspiracy..

Re: tell tale re roite conspiracy..

Hummm, never heard of that one. Seems to me you would want tell tail to be in a common place in the cooling system like were it was. technically I would think It needs to be the last thing in line but mine is before cyls. and thermostats (last thing). I guess back pressure still causes a weak stream when a passage is blocked.

 

[retiredfornow]

Re: tell tale re roite conspiracy..

Re: tell tale re roite conspiracy..

http://issuu.com/cdielectronics/docs/troubleshootingguide
Go there, on page 117, and it's a service bulletin on moving the pisser.
Did mine, and I'm really pleased.

 

[boobie]

Re: tell tale re roite conspiracy..

Re: tell tale re roite conspiracy..

The pisser was moved to the top of the block mainly to get any aireated water out of the block. Those mtrs had a habit of getting hot spots in the block and blowing # 2 piston. If you still have the 3 blade water pump impeller in it, get rid of it and install the up-dated kit. Those mechanics you talked to don't know s**t about OMC products or else they're awfully young with no experience.

 

[mortymolly]

Re: tell tale re roite conspiracy..

Re: tell tale re roite conspiracy..

So here is my question to you
...did your tell tale stream get stronger....I channged mine to
the top and I can not even keep my hand in front of the stream...how bout yours...

 

[retiredfornow]

Re: tell tale re roite conspiracy..

Re: tell tale re roite conspiracy..

Yes, the tell tale got markedly stronger, really shoots it out there.

 

[levi_tsk]

Re: tell tale re roite conspiracy..

Re: tell tale re roite conspiracy..

ive heard of it and i agree with boobie it can also be done on the v4's but im not sure which bank of cylinders it goes on i want to say its the port but dont quote me on that

 

[mortymolly]

Re: tell tale re roite conspiracy..

Re: tell tale re roite conspiracy..

Yes, the tell tale got markedly stronger, really shoots it out there.

I am really glad to hear that your stream pressure went up to...i know one thing, there are no air pockets in my motor....that will give me a smile when i am ten miles off shore

 

[boobie]

Re: tell tale re roite conspiracy..

Re: tell tale re roite conspiracy..

Back in the day on the old cross flow v-6's the pisser tube left the exhaust cover on the bottom of it. I think there was a bulletin to get a longer hose and run it over the top of the head and then to the pisser outlet. This did the same thing, to get rid of any airerated water. It would work on the old v-4's also.

 

[Dhadley]

Re: tell tale re roite conspiracy..

Re: tell tale re roite conspiracy..

Yes, moving the outlet nipple to the top of the block will help get rid of trapped air. The hose rerouting on the V motors was supposed to do that - it helped but was not a complete fix. We started venting the top of the V blocks back in the mid 80s to save the water cooled reg/rect (it worked) and found it also cut down on ring cokeing on the starboard pistons. The issues with the 56 cid 3 cylinder #2 piston had a little to do with cooling but was related mainly to other issues (easily rectified).

 

[surrender]

Re: tell tale re roite conspiracy..

Re: tell tale re roite conspiracy..

Does this apply to all Crossflows, even late models like a 96 88 special? Did mine but ended up with bad rings on the starboard side, dont think the two were related but just wondering about later models. Saw the bulletin and it is for older models.

 

[WernerF]

Re: tell tale re roite conspiracy..

Re: tell tale re roite conspiracy..

Yes, the tell tale got markedly stronger, really shoots it out there.

I do not understand. The pressure should be the same, actually even a tiny bit lower because now the elbow is one foot higher than before.
I guess the stronger tell tale comes from the hose replaced with a new clean one. Probably you had to replace the elbow too. At least I had to because that old plastic thing didn't come out as a whole. BTW why did OMC place the old hole just a little lower than the upper engine cover edge? I used an old dentist probe to clear the threads; the NPT die didn't get in.

 

[retiredfornow]

Re: tell tale re roite conspiracy..

Re: tell tale re roite conspiracy..

Used the same hose but a new elbow. The old elbow was clear, tho. I guess the pressure is higher at the top.

 

[WernerF]

Re: tell tale reroute conspiracy..

Strange, isn't it? Maybe the flow conditions are more complicated than I thought they are. I expected the exhaust cooling to be one chamber at one pressure.
How did you reuse the hose? Was the original one long enough (19")?

Well I relocated the hose and elbow just prior to fogging on muffs. So I didn't notice, whether the tell tale is stronger now. It was pretty strong before though.

 

[Dhadley]

Re: tell tale re roite conspiracy..

Re: tell tale re roite conspiracy..

Does this apply to all Crossflows, even late models like a 96 88 special? Did mine but ended up with bad rings on the starboard side, dont think the two were related but just wondering about later models. Saw the bulletin and it is for older models.

Venting the block will help with the starboard side ring issues but may not eliminate the cause 100%. You also need to look at set up and the top capable rpm. If you are lugging the motor the rings will still coke up and eventually break.

 

[L.A.Wise]

Re: tell tale re roite conspiracy..

Re: tell tale re roite conspiracy..

I have modified the pisser on my 3 70HP evenrudes, 115 HP evenrude and 50 HP johnson. I did a little more than redirect the stream though, I connected them to a water pressure guage. Guess you could also run it to a water temperature guage. If you ever get to a point there is no water pressure, shut the motor down quick. Water temperature still scares me a little as when the horn in the control box goes off, you will usually seriously damage the motor before you can shut it down. I like as much advanced warnings as I can get.

 

[surrender]

Re: tell tale re roite conspiracy..

Re: tell tale re roite conspiracy..

Dhadley, was running a 13 X 15 three blade, engine mounted second to highest hole up and turning 5600 at WOT. I think between a possible deflector problem and possible exhaust cover internal leak I tracked down the problem. All new cover and deflectors for the rebuild.

 

[sutor623]

Re: tell tale re roite conspiracy..

Re: tell tale re roite conspiracy..

Hahahaha. Never heard it called the pisser before.

 

[MJS]

Re: tell tale re roite conspiracy..

Re: tell tale re roite conspiracy..

I would think that the pisser is infront of the line up because it uses the engine as resistance to create pressure in the tell-tale. Think of a garden hose laying on the ground with no nosle on the end. If the flow is unrestricted and you drill a small hole near the end the water is going to follow the path of least resistance. Now if you move the hole closer to the source and put some obtructions(thermostat) and some bends in the hose, it might start spraying out the hole.

 

[Shawnsgarage]

Re: tell tale re roite conspiracy..

Re: tell tale re roite conspiracy..

I would think that the pisser is infront of the line up because it uses the engine as resistance to create pressure in the tell-tale. Think of a garden hose laying on the ground with no nosle on the end. If the flow is unrestricted and you drill a small hole near the end the water is going to follow the path of least resistance. Now if you move the hole closer to the source and put some obtructions(thermostat) and some bends in the hose, it might start spraying out the hole.

Ok guys, I need help, I have 1990 60 hp vro and if I drill where it says...I will have issues,, I have an npt thread already in the head, can I put it there ?