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Old 07-05-2014, 06:33 AM   #1
Widgeon
 
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Default Predator Mud Motor





Ok got a few questions.

1. Have you ever had the problem of throtteling down and the engine cuts out after youve been running a while (30 min -1 hour) and have a hell of a time getting it restarted? Somtimes mine wont even pull. What Causes this?

2. I just put a new air filter and carb jet in and the vapor lines from the tank and valve cover are gone. I put rubber caps on them but the valve cover cap just kept poppin off so I said screw it and left it off. Engine actually ran better. Is this coincidence or does this need to breath?

3. Anybody who has gone with the hop up kits from NR Racing get even better results with a ginuine Honda Carb?

Thanks
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Old 07-05-2014, 08:29 AM   #2
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Thanks to the EPA, the valve cover and gas tank breathers are a necessity. You can't plug either one or it wont run right.

I plugged both of mine and it wouldn't start at all, unplugged them and the thing starts on the first pull now.

I get hopup parts from OMB Warehouse.

This is my 212 test mule before I added the intake and carb re-jet:
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Old 07-05-2014, 08:41 AM   #3
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I have the exact same exhaust. Sounds bad ass!!

What about the engine cutting out? Ever have that problem after it gets hot and being hard to pull?

What size jet did you use on your carb?
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Old 07-05-2014, 08:46 AM   #4
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Default Re: Predator Mud Motor

Cimm, what is that circular contraption coming off the motor? Exhaust? Second question is, what are the benefits of hopping your moter up and are these benefits worth the price?
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Old 07-05-2014, 08:58 AM   #5
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I haven't had an issue with mine cutting out. Is your throttle closing too much when you let off of the throttle? How does it idle for you? Have you checked your plugs to see if you are running rich/lean? Here's a good graphic to help, if you need it:


I'm running a 140 emulsion tube and can't remember the jet size, I think a 33 but the link below says what I ordered came with 38 and 39 jets, I'll have to pull it to be sure. I'm still fine tuning currently and I will probably have to play around with jet sizes again, but I'm waiting for the flood waters to go down before messing with it again.
http://www.ombwarehouse.com/Racing-Jet-Kit.html
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Old 07-05-2014, 09:01 AM   #6
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Default Re: Predator Mud Motor

My 212 ran bad at first then we removed the little rubber nipple from the top of the gas tank and it has run perfect since.
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Old 07-05-2014, 09:06 AM   #7
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Quote:
Originally Posted by big38 View Post
Cimm, what is that circular contraption coming off the motor? Exhaust? Second question is, what are the benefits of hopping your moter up and are these benefits worth the price?
That is a Robertsons Torque Tube - Boat Loop. It gained me some torque over a stock restrictive exhaust. I added a muffler after that photo, because open header is damn noisy. Don't mind the missing muffler clamp.


I mod motors with external mods. Air filter, carb re-jet, and an exhaust and you have a very snappy motor. All of these small engines are coming from the factory VERY lean and once you do a few mods and get the carb dialed in, they rev right up and aren't sluggish at all...unlike when they are stock.

I have $150ish in mods to out test mule motor with the items described above, but that took my stock 6.5hp motor to around 9-10 ish. Robertson's guarantees a 1-2 torque gain on the 212 predator.

I'm a gearhead by heart and can't leave anything alone.
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Old 07-05-2014, 11:18 AM   #8
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I got the #92 Jet from NR Racing and kep the stock tube by recommendation from them. It idles fine. The problem is when I'm running the hell out of it and then back way off like when I'm cutting into a cove and sometimes it dies and is hard to pull. Almost like its getting hot and getting vapor locked. If i let it sit for a few minutes it startes right back up like a champ!

Whats the difference in the stock tube and a 140? Air, Fuel?
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Old 07-05-2014, 01:27 PM   #9
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The 140 etube atomizes the fuel better than the stock one. No power increase I don't think but throttle response improves.
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Old 07-05-2014, 03:19 PM   #10
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I purchased a 2nd PPF Wood duck motor after selling the first then kicking myself. Anyway I wanted electric start and did not want to spend the extra coin for the Kohler option. I opted for a Lifan electric start from Home Depot.

http://www.homedepot.com/p/LIFAN-3-4...2BDQ/203277122

It's all stock right now and so far I'm pretty happy with how it runs on a Four Rivers refuge runner. Just another option out there.

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Old 07-06-2014, 11:43 AM   #11
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Justin, you say you're a gearhead... Obviously you have a ton of knowledge about those small engines. Anyways, Ecotrons makes small EFI and turbo kits for those small engines. Have you ever considered purchasing some of that stuff and seeing what kind of performance you could get out of one of those little motors? A 15 horse with the weight of a 6.5 horse would be pretty danged neat.
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Old 07-06-2014, 12:09 PM   #12
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Originally Posted by bullcan View Post
Justin, you say you're a gearhead... Obviously you have a ton of knowledge about those small engines. Anyways, Ecotrons makes small EFI and turbo kits for those small engines. Have you ever considered purchasing some of that stuff and seeing what kind of performance you could get out of one of those little motors? A 15 horse with the weight of a 6.5 horse would be pretty danged neat.

Yes it would. But at $500 you'd be defeating the purpose of these cheaper kits.
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Old 07-06-2014, 12:28 PM   #13
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Yes it would. But at $500 you'd be defeating the purpose of these cheaper kits.
I hear ya there.
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" Shooting Divers Is Like Trying To Shoot Carnival Rabbits......From The Ferris Wheel With A Drunk Carnie At The Helm "

"Sea ducks are for me. Let's hunt in 10 footers and sink the boat. THAT is excitement!!!!"

My boat runs on gas; not "Thank you's."
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