Grease the teflon tube

[paulejr]

Dues one grease the Teflon tube inside and out?

[photohoward1]

Dues one grease the Teflon tube inside and out?

Just grease the shaft that goes in the Teflon.


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[fweasel]

I try to make sure the outside of the teflon liner, and the inside of the brass stuffing tub are clean to prevent the liner from twisting or otherwise slipping out of position. I apply grease only to the flex cable and propshaft before installing them.

[jaike5]

Or lose the teflon liner. You can use Merc marine grease, has teflon in it. Mix with OSE grease cause its thick! Put a small piece of water cooling tubing over the end of the stuffing tube where the cable comes out , stops water from coming up the stuffing tube. I just use lots of grease, good for three heats. no water.
J.

[paulejr]

Well, that is what i thought. I greased the flex shaft thoroughly and put new Impulse 32 in water and within 2 minutes, the shaft got so hot the prop hub separated from the flex shaft ,came off in the water ( now at the bottom of the lake ) , all but about 2 inches of the Teflon turned into charcoal , the grease catcher melted and filled the boat with smoke. Upon further inspection, when i finally got the flex out of the tube, where the flex shaft that got melted into the brass plated steel stuffing tube, there is a burr where the factory attached the flex to the prop hub. Now, I know you are thinking I did not grease the flex, but let me assure you as one with slight OCB , i greased that shaft, and the noise it made just before I was about to bring it in to check temps, it died.

[jaike5]

With a new cable I always go over the whole cable and stub with emery paper to take off any extras that may come with your cable. With up grade parts from ose you should have no problems. Factory parts are usually not quite up to par.

[photohoward1]

How many cells and what kind of RPM are you turning?


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[paulejr]

2 @3S wired for series . they rated at 11.2v and the motor is 2040 stock Spektrum = about 28,000 to 30,000 rpm less the slippage and I did not get a full run for the 2 minutes due to geese and some channel buoys. this was just shake down and it shook pretty good. it was all stock and the batteries are also Spektrum. not sure how fast as I forgot to turn on the gps speedo....

[paulejr]

2 @3S wired for series . they rated at 11.2v and the motor is 2040 stock Spektrum = about 28,000 to 30,000 rpm less the slippage and I did not get a full run for the 2 minutes due to geese and some channel buoys. this was just shake down and it shook pretty good. it was all stock and the batteries are also Spektrum. not sure how fast as I forgot to turn on the gps speedo....<br><br><br>

[jaike5]

Perhaps your stuffing tube and out drive/stinger are not aliened.

[paulejr]

When i get to put this thing back together, I will check all the alignments again. Being a Journeyman Machinist ( Marine) retired, alignment is my middle name...Normaly,alignments are done ( up to) against the prime mover . in model boat case .. a real challenge to align all, once the stuffing tube is fixed by the manufacture in epoxy ... but, there is a dremel or two in my quiver
...

[photohoward1]

6s under load is at least 20v. So more like 40k rpm. That?s a lot for Teflon. It gets twisted up.


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[paulejr]

So, put the batteries in parallel to make 2 x 3S ? then closer to 22,000 rpm... or run without the Teflon? Or, huh I know I know, shim the factory tube (5/16ths) to run 1/4 inch flex and no Teflon ?

[paulejr]

so why would the factory put that much rpm in a teflon lined tube ???

6s under load is at least 20v. So more like 40k rpm. That?s a lot for Teflon. It gets twisted up.


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[photohoward1]

That is a very good question.


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