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Thunder Cat 31

Old 08-24-2007, 07:16 PM
  #1626  
JPriami
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Default RE: Thunder Cat 31

Well I pretty much finished up with the paint job on my TC31 today. I have a couple of things left to do but it needs to cure a while longer. I don’t have my air scoop back on the top yet or any of the hardware/motor etc.

Let me know what you guys think.

I used decals/stickers from different things I have purchased/own but never used the stickers for till now lol


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Old 08-24-2007, 09:00 PM
  #1627  
wave waker
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Default RE: Thunder Cat 31

NitroSS,awesome paint job![sm=thumbup.gif], very nice lookin' boat
Old 08-24-2007, 09:11 PM
  #1628  
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Default RE: Thunder Cat 31

Thanks wave waker. You know its kind of odd now that I think about it. We both kind of got our boats around the same time. And we have both played around with tweaking them. I havent been in this forum much the past few months I come back with plans on putting in a larger engine like the .46 and painting the boat. And your doing the same. Too bad we dont live close it would be cool to go boating with you. Not too many peeps out here I know. BTW you boats paint job looks good. I like the layout.


Just stuck my scoop back on. looks better now

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Old 08-24-2007, 10:20 PM
  #1629  
wave waker
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Default RE: Thunder Cat 31

Hey NitroSS, did u know that i have same paint color painted on my 7.5 tunnel, here's the pics.. i really like that color.

yup, it's gonna be real fun if we can run our modified tc31 at the same time.

i agree your boat needs beefy powerplant[sm=thumbup.gif].

get a close up shot while on the water, that's gonna be a cool lookin.
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Old 08-26-2007, 04:39 PM
  #1630  
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Default RE: Thunder Cat 31

I have been slowly putting my TC31 back together today. Going to put the dynamite .32 back in for the mean time till I make up my mind on a new engine. But I wanted to ask this. has anyone tried removing their flywheel on this engine yet? I mean you dont need it to start the boat and it shouldnt over rev if you keep the boat in the water when at full throttle. beside I notice mine isnt balanced worth a darn looking at it on my prop balancer in front of me right now.
Old 08-27-2007, 12:15 AM
  #1631  
Hesco Racing
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Default RE: Thunder Cat 31

You'll have very bad throttle response iff you remove that flywheel. Especialy on closing throttle the motor will tend to keep on running longer before decreasing.
Old 08-27-2007, 12:59 PM
  #1632  
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Default RE: Thunder Cat 31

Well I did take it off and used a spacer (old plane prop with the blades cut off then balanced it). I havent run it yet. I dont have the servos back in it yet. I dont doubt what you say is true Hesco. But my what if side says try it so I will. With the boat in the water and the strut way below stock to get the prop lower in the water I think it will have a decent load upon it. Also wonder if I can turn a slightly larger prop now with the engine not having to work at keeping the extra rotating mass going. Another thing that made me wonder all this is my dad is my only other fellow boater. And we bought him a SW36. Last year his boat seemed to pick up speed. then after refueling and starting it up again we noticed the flywheel was loose and spinning freely.

But if it doesnt work I'll put it back on and I also have another one I might try instead.

still undecided on upgrading to a OPS .45 or just spending more money and just buying a warehouse hobbies boat as a kit.
Old 08-27-2007, 02:22 PM
  #1633  
Custom Trendz Inc.
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Default RE: Thunder Cat 31

So i got my Thundercat 31 yesterday. Installed my mx-3 and added some flotation(pipe warmers...the things that go over the hot water pipes.) Here are the pics. Any tips on doing something else?




Old 08-27-2007, 03:02 PM
  #1634  
Hesco Racing
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Default RE: Thunder Cat 31

Its actually quite nice to see this boat so new.
I now you dont want to read all 81 pages so heres my short version.
1. Remove shaft and grease libberaly with a water proof grease. Pack te skeg housing also.
2. Remove the header and clean up the welding on the inside of manifold (becarefull the gasket).
3. Get new silicone tubing for the tune pipe coupling because it wont last long.
4. Check feul tank for leaks on seam and cap that it seals.
5. Remove preasure nipple from manifold and move to fattest part of tune pipe.
6. Remove radio box remove servos and receiver and battery pack. Replace lid seal all must have openings. PLace in water and blow through arial tube. Their will be leaks trust me. Epoxy them closed.
7. Remove and pack tigerdrive with grease. Refit.
8. Depending on how hard you ride your boat will determen whether to replace steering servo. It aint great. picksup wear quickly.
9. Replace prop with Prather 225 or Octura 445.

Enjoy a realy good boat.
Old 08-27-2007, 03:12 PM
  #1635  
Custom Trendz Inc.
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Default RE: Thunder Cat 31


ORIGINAL: Hesco Racing

Its actually quite nice to see this boat so new.
I now you dont want to read all 81 pages so heres my short version.
1. Remove shaft and grease libberaly with a water proof grease. Pack te skeg housing also.
2. Remove the header and clean up the welding on the inside of manifold (becarefull the gasket).
3. Get new silicone tubing for the tune pipe coupling because it wont last long.
4. Check feul tank for leaks on seam and cap that it seals.
5. Remove preasure nipple from manifold and move to fattest part of tune pipe.
6. Remove radio box remove servos and receiver and battery pack. Replace lid seal all must have openings. PLace in water and blow through arial tube. Their will be leaks trust me. Epoxy them closed.
7. Remove and pack tigerdrive with grease. Refit.
8. Depending on how hard you ride your boat will determen whether to replace steering servo. It aint great. picksup wear quickly.
9. Replace prop with Prather 225 or Octura 445.

Enjoy a realy good boat.
1. Is superlube, or white lithium grease fine?
2.Alright but with what tool? I got a dremel.
3. Working on getting some.
4. By blowing air or filling with water?
5. And how do i close the stock hole?
6. What you mean all must have opening? Aerial tube(antena???)
7. What kind of grease? White lithium or superlube?
8. Alright
9. Working on it.
Old 08-27-2007, 03:29 PM
  #1636  
Hesco Racing
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Default RE: Thunder Cat 31

1. We use a red rubber grease but I'd say Lithium should be fine
2. Dremel with a carbide bur bit
4. feul is thinner than water. Fill her up and blow through the preasure tube. Dont pop a vein in your head please.
5. M3 x 4mm screw with plenty studlock or locktite red. Mine has lasted a whole season.
6. The mounting screw is a must have opening, the throttle \tube is a must have opening you get what I am saying.
7. any good bearing grease.
Old 08-27-2007, 08:04 PM
  #1637  
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Default RE: Thunder Cat 31


ORIGINAL: Custom Trendz Inc.

So i got my Thundercat 31 yesterday. Installed my mx-3 and added some flotation(pipe warmers...the things that go over the hot water pipes.) Here are the pics. Any tips on doing something else?





Would you do me a favor and weigh your boat with everything in it needed to run except fuel?
Old 08-29-2007, 05:19 PM
  #1638  
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Default RE: Thunder Cat 31

Hey i just picked up my thundercat, and i cant get it started. Here is what is going on. I can ge it sarted, but then it revs up real high and dies. It sounds like it wants to take off, and then shuts off. If i give it gas when this is going on it dies. Anyone wanna help me out. Thanks.
Old 08-29-2007, 07:03 PM
  #1639  
wave waker
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Default RE: Thunder Cat 31


ORIGINAL: mck22

Hey i just picked up my thundercat, and i cant get it started. Here is what is going on. I can ge it sarted, but then it revs up real high and dies. It sounds like it wants to take off, and then shuts off. If i give it gas when this is going on it dies. Anyone wanna help me out. Thanks.

check the HSN and the LSN setting, u can start 2.5turn for HSN and 2turn for LSN, if flooding occurs keep leaning the LSN by 1/4 turn...check also the fuel line for any bubbles, sign of leak.
Old 09-01-2007, 02:42 PM
  #1640  
tar70403
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Default RE: Thunder Cat 31

I just purchased a gallon of trinity monster horsepower 25% power blend. Can this be used in the stock engine on the thunder cat 31? I am also thinking about using an os A3 glow plug. Would this combination work well?
Old 09-01-2007, 04:41 PM
  #1641  
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Default RE: Thunder Cat 31

hi guys, i ordered me a thundercat last night. my first boat. i should have it hopefully in less than 2 weeks. anyway i'm tying to get ready for it's arrival. i was reading that you guys put pool noodles in the hull for floatation, what size(diameter) around are you guys useing. i know it needs to be cut to length, but not shore on how big around. thanks
Old 09-01-2007, 05:08 PM
  #1642  
wave waker
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Default RE: Thunder Cat 31


ORIGINAL: tar70403

I just purchased a gallon of trinity monster horsepower 25% power blend. Can this be used in the stock engine on the thunder cat 31? I am also thinking about using an os A3 glow plug. Would this combination work well?

is that 25% nitro or oil?...most boaters recommended at least 18% oil..it will work on stock engine..A3 is a hot plug which is intended to use for low nitro%...os A8 is much better for the nitro u have.


gamesbeer1,

if ur buying a pool noodle just grab 1 length piece, no need to worry of the size coz just cut to fit when u have the boat....have fun..
Old 09-01-2007, 07:21 PM
  #1643  
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Default RE: Thunder Cat 31

ok , i just cut to fit. even if it's bigger. i just cut and fold, or just cut peices and make peices fit
Old 09-01-2007, 09:07 PM
  #1644  
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Default RE: Thunder Cat 31

It is 12% synthetic oil racing castor blend. The bottle says 25% nitro. Do you think it is okay to run since lower oil content?
Old 09-01-2007, 10:26 PM
  #1645  
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Default RE: Thunder Cat 31


ORIGINAL: tar70403

It is 12% synthetic oil racing castor blend. The bottle says 25% nitro. Do you think it is okay to run since lower oil content?

i'm not expert on how this thing will affect the engine but if i'm on ur shoe, i'l run it, just don't run too lean and check engine temp. from time to time, my experience with dynamite .32 runs great on 160-190 oF....my understanding of oil content is lesser oil creates more engine friction that make temp. increase, and shorten engine life,,,, with higher oil less friction created, engine runs cooler and makes engine life longer,... with too much oil, engine performance is affected coz during combustion oil is harder to burn and less power is created...just my 2cents.
Old 09-02-2007, 12:17 AM
  #1646  
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Default RE: Thunder Cat 31

If its only 12% synthetic and no castor I would not use it. Castor is your best nitro motor lubricant. An 18% oil is much beter as Wave waker sayd. We run a 13% synthetic and 5% castor blend with 40% nitro. The speed difference from 25% to 40% is substantial.
Old 09-02-2007, 12:32 AM
  #1647  
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Default RE: Thunder Cat 31

Odd I was talking to someone today that has raced boats for 20+ years now and in namba races. He said castor is no good because it dosent mix with the fuel well. that the synthetic type is much better.
I'm not endorsing either or just saying what I was told.
Old 09-02-2007, 12:44 AM
  #1648  
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Default RE: Thunder Cat 31

Hi. I'm a newbie. My tiger starter went out of me today (3rd tank). One.....any clue if I have done something wrong. Small trails of a black liquid came out as residue.

I'm thinking of replacing with Sullivan but what to hear and see more about the Belt Starter and how it works. I've been searching on where to find the Prather PRA8020 flex cable for back up....but, I can't find where to buy it. Should I be getting a spare flex shaft as well?
Old 09-02-2007, 12:50 AM
  #1649  
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Default RE: Thunder Cat 31

Mine went out pretty soon after getting my boat also. Some say get the other brand drive starter. A belt would work yes. But me, I just got the pull starter that used to come on the shockwave 36 boats. And it has worked and never let me down since. No batteries or starters to lug around. Just my glow igniter, fuel, radio, boat and tool bag if needed.
Old 09-02-2007, 03:25 AM
  #1650  
Hesco Racing
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Default RE: Thunder Cat 31

Had a raceday yesterday and came third behind a TC31 second and John just driving too good with his SW36. But the next race I'll give them gas. Only got the setup dialed in by the 4th heat but now I have my bad water setup. So watch out.
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