Why is this happening to my Geico ?

[maxmekker]

That's it. I'm lost as to how I should fix this water issue with my Geico.

I have , 'since last time' pulled out the old Teflon Liner and replaced it hoping it would do better.

I have before that, replaced flex , there are no leaks in the cooling lines ore the boat it self , bushings in the strut replaced, added heat shrink between where the strut and brass tube meets. Lots , medium ore small amount of grease on the flex. And it always ends up with the same.

the pic's show what's up after a 4- 5 min run. Spray on the lid from where the flex enters the hull, and all the grease is phused into the boat ( the flex look like it's been whiped clean)


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Now I have a leo 2150kv comming as a gift from a friend for setting up his PNP Mystic , so it would be nice to enjoy the boat before fall and cold weather.

Thanks for looking

[domwilson]

Looking at the spray, it appears to be coming from the end of the stuffing tube. What grease are you using? Are you greasing the whole shaft? Try a tighter fitting fitting over the stuffing tube.
Have you done the bathtub test?

[ray schrauwen]

You see in picture #3 you have a washer between your drive dog & strut. It is larger in diameter than the DD and the strut Therefore water is hitting it as you drive and being forced up the shaft. After 4-5 min. of course the grease is all up there, thats a long run for electric but, just remove that washer and make shure you have a 5/32" gap between Dd & strut and ti should not rub the strut and you should not have water coming in.

Of course, as you increase motor KV, it will take less time for grease to exit fornt or rear, so watch run times and grease more often than before!!.

[dana]

I agree with ray, loose the washer.

[maxmekker]

Domwilson:

I use both ACraft and PBoat grease . I have tested both the cooling lines , and the boat in the tub to see if there was any leak, but the spray pattern on the tupeware lid say's it all. Just not sure where it enters.



RAY :

It's not easy to se but I have a piece of fuel line over the inboard end of the stuffing tube. Also the washer is a small rubber washer we use at work so the screws don't rub of paint on some plates we have for fuse boxes. On my friends Mystic there is a nylon washer, my geico used to have one to (came with it installed) , lost it and have been running without it, so the rubber washer was just a test to see. I have been using Kintec flex and strutt washer since day one. Changed out the kintec bushing for some teflon ones just now , but it's just the same.

I will loose it (rubber washer) , re grease and hit the pond again, also install a fresh shrink tube over the brass / strutt.

it feels like the flex is acting like a pump :-)

I can say that my freinds PNP mystic is running the stock setup, and I have greased the flex once, and last night we had pack nr 6 on it, and there was a tiny amount of spray inside(on the tupeware lid) , just like it was on pack nr 4 and 5 , but it's like nothing, barly some drop's. So I will pull out that flex today and se if it's free of grease ore if there is still more on it. When I pull out mine, it's liek it's been wiped clean, and that is after 4-5 min run.

I really hoped changing the nylon insert in the brass would fix it, the stock one seemd worn when I pulled it out , and it was a heck of a challenge getting the new one in without bending it all to hell.

Also Ray ,you say' After 4-5 min. of course the grease is all up there, thats a long run for electric'

I don't understand, I had the boat running , well I would say maybe 8-10 packs and then I would grease, (may 2011 to end of july 2011 when it suddenly happend) and with 4500 pack's I have about 4 to 5 min run time. I can understand with a higher kv motor one would need to pull it out more often to grease (and I did after I got the LEO ) but not after every run, and not pull to shore after a few minut's and grease, and continue :-)

Thanks so far






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[ray schrauwen]

There is one more thing to check but, I'm almost 100% its the washer since it's large diameter than stock.

If you look closely at your flex cable while clean, what direction does the flex cable go? does it look like ////////////// or \\\\\\\\\\\\\ ?

the first is correct for left turn props, the other is for reverse props in dual drive.

If you received a reverse one like the second it will pump water into your hull non-stop but, not likely its the wrong direction. I did once receive a cable that was reversed on a crappy wood rigger from R2 Hobbies.

I run a Geico in LSO, limited spec offshore class and after 4min, on 1800kv, there is no Grimm grease left. It's too each his own how they lube thier shaft, har, har.... jk... but, more lube is always better, more often never hurt and its only 2 wrenches.

[ray schrauwen]

I do use a Hughey flex cable BTW.

[maxmekker]

oK, Will have a look at it asap when Im home from work. The Gecio had an issue when it hit the stores with the wrong flex, and ose/kintec was there shortly after with the replacement one, wich I'm using ( worked fine from may untill july last year) still the same flex, but I will have a look.

Also with all the folks on the tube running high kv motors with 6s on this boat (hehe) they must then have a small water pump in the boat to get it all out :-)

here is how it runs btw.

http://www.youtube.com/watch?v=v5SiQkL3XqM&feature=autoplay&list=UURNlga8sE0qJBcPb_5FFovQ&playnext=1

[maxmekker]

Found some pic's.

bushing replaced, flex after one run, no grease left, and maybe you can se how it is turned

thanks

[martin]

I dont think the spire on a flex has anything to do with water coming up into the boat, ecspecialy when you look at a anticlockwise flex where the wind would auger water the other way & not into the boat. I believe its more to do with getting water into the tube in the first place either at the dog & or where the stuffing tube joins the strut & then the water pressure from more water pushing & so on.

[martin]

If you do get water entering the strut on any boat a good mod is to use a dog the dosnt have a square shoulder at the front of the dog as most dogs have, you get high pressure in between the dog & strut & the easiest route for the water is up the tube. You can ease the pressure a lot with a dog that has a 10-15 degree angle on the front of the dog, it also reduces drag a bit as well.

[maxmekker]

So today I did this, New flex, change prop to 642. 2 rubber rings( from a tamiya damper) larger shrink tube. lot's og grease.


Then I went out.



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[maxmekker]

Short video from Run. A small storm is comming, Frida, so I did only one pack, to dark and it was raining ( just a tad)

[maxmekker]

So this is how it was when I came home. Just a small amount of water. Flex was almost free from grease, but no greasespray inside boat, and also the new flex, brand new, had a little 'something' , this was not there before I installed it, checked it good.







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[martin]

Id say you have stretched the flex where the dog bottomed against the o rings & before the flex had reached its full wind up (shortening with load ), your lucky the flex didnt break. You need a gap between the dog & strut to allow for wind up of the flex, the gap need to be around whatever diam the flex is.