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Fuel tank without primer

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Old 05-22-2007 | 07:24 AM
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Default Fuel tank without primer

I just destroyed my original savage 21 fuel tank, smashed the primer straight through the bottom of the tank. I'm looking at replacing it with a rear pick up tank from the Savage 25/ss/X. I don't have rotostart however so i'll still need to prime the engine before i try to start it, plus i need to have some way of priming my header tank as well. Can i just get the 25/ss/X tank and use the Associated Fuel Primer bulb that you can get from Tower (http://www2.towerhobbies.com/cgi-bin...?&I=LXFUD3&P=7) between the main tank and the header to prime the header/engine?
Old 05-22-2007 | 09:10 AM
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Default RE: Fuel tank without primer

I'd recommend getting a new fuel tank, and as far as priming goes, turn off the truck (if it's on), move the throttle to full open, put your thumb over the exhaust stinger, and pull the pullstart a few times. If you're header tank also needs to be filled up, the fastest (but not necessarily safest) way I'd do it is to pull the pressure line that goes from the pipe to the main tank, and blow into it until fuel flows from the main tank into the header tank. Pinch the pressure line before taking another breath and/or removing it from your mouth to avoid getting exhaust gasses that are still in your fuel tank into your mouth.
Old 05-22-2007 | 09:16 AM
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Default RE: Fuel tank without primer

I would get the newer of the fuel tanks..
Go away from that stock primer system on the Savage. It only makes for problems, since that button loves to start leaking.

I would go with an inline primer just like your looking at. But i would go ahead and get the filter and primer in one. This way you dont have two inline units on your fuel line. much like the item below
http://myrcsupply.net/index.php?main...oducts_id=4519
the fuel tank is HPI87149
http://myrcsupply.net/index.php?main...products_id=20
Old 05-22-2007 | 09:19 AM
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Default RE: Fuel tank without primer

I would urge you not to get an inline primer because those are a major cause of air leaks and bubbles in the fuel line. Just stick with an inline fuel filter and prime it like how I explained above.
Old 05-22-2007 | 09:22 AM
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Default RE: Fuel tank without primer

I saw the some filter and primer units on tower, either the ofna one (http://www2.towerhobbies.com/cgi-bin...?&I=LXEYG3&P=7) or an integrity one (http://www2.towerhobbies.com/cgi-bin...?&I=LXRJL0&P=7). I'm worried about the size of the primer though, it looks a bit small, would it push enough fuel around? then again, the primer on my original tank probably wasn't very large either. i like the ofna one cos it comes with a bracket, although i have no idea where i'd mount it. anyone tried those filter/primers? do u have to squeeze it thousands of times just to move enough fuel around?
Old 05-22-2007 | 09:25 AM
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Default RE: Fuel tank without primer

You have had issues with the inline primers from ofna?

i have installed these units for the last couple years. in fact all of my buggies run them, and so do my savages. i never have air bubbles in the line. (maybe you should try some ties/clamps.)

any time you cut your fuel line to insert anything you at risk for creating a leak. It would be the same exact thing as an inline filter. Infact the connection is identical.

the reason i recommend this, is becuase i dont like showing people those above mentioned methods of priming your truck. Simple reason is that they may flood the engine and lead themself blindly onto other problems. I guess its knowledge that comes with years of experience with rc hobbyists.
Old 05-22-2007 | 09:29 AM
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Default RE: Fuel tank without primer

sorry, i probably wasn't very clear, i haven't actually ever used one of these at all. they look good, but i was just wondering if they were big enough to do the job of moving the fuel around cos the bulb looks smaller than the associated primer bulb. if u've had a good experience with them i think i'll get one of those with a savage 25 tank. how did u mount the primer/filter? do u have a tank guard recommendation as well?
Old 05-22-2007 | 09:32 AM
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Default RE: Fuel tank without primer

It is just as easy to overprime the engine using a primer bulb then it is to prime it by the choking method. Fuel filters are made of metal and most have single or double O-ring seals. The plastic primer bulbs leak where the "edge" (created by the molding process) is, and the silicone ones tear because they are fairly thin. Also, I've gotten pinhole leaks in them just by running in sand and dirt a lot.
Old 05-22-2007 | 09:43 AM
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Default RE: Fuel tank without primer

well, i mounted them all over the savage. It just depends on what the customer wants.
These units do perform well, and normally about 3-4 pumps on the primer will get fuel into the tank. The main thing is to watch when the fuel hits the inlet nipple. you dont want to flood the engine.

Most of the time, you can install this thing, buy finding your mounting spot and cutting the fuel line and pushing the unit into each side. The issues come with all the different size fuel lines that are run on the savage. Some will be larger, and then like the above mentioned, you will need to use a small ziptie to completely seal. IF you dont want to mess with that, get the standard fuel line size.

as for a tank guard. Integy makes one thats nice, and so does Golden Horizons. These are the only two that im really up to date with. I would say that if you drive in a place where you tank is at risk of being broke, than a tank guard would be your best bet. All the ones that i have seen are pretty much the same design and protection, so find the one like best, or fits your budget and go with it.

Hope this helps
Old 05-22-2007 | 09:48 AM
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Default RE: Fuel tank without primer

yep, thanks myrcsupply, u been a great help. wasn't too sure about the primers, but i think i'll definatly be getting one of those.
Old 05-22-2007 | 09:50 AM
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Default RE: Fuel tank without primer


ORIGINAL: IBrakeForNobody

It is just as easy to overprime the engine using a primer bulb then it is to prime it by the choking method. Fuel filters are made of metal and most have single or double O-ring seals. The plastic primer bulbs leak where the "edge" (created by the molding process) is, and the silicone ones tear because they are fairly thin. Also, I've gotten pinhole leaks in them just by running in sand and dirt a lot.

To each his own, right?

Your correct that it is just as easy to do so, however they have a METERD type of priming system now. So they can say well 5 pumps get the fuel to the carb and it becomes routine, instead of "well now my engine wont turn over at all, i think its broke".

as i said, my information just comes from years of customers coming to our place. When you give them instructions like that, they are back within an hour stating that they now cant get the engine to turn over. once i started turning them on to the inline primers, this problem became less and less of an issue with the novice rc driver.
Im not too sure why, other than most people prolly cant watch the fuel line while pulling the starter, and holding the exhaust. and the whole blowing into the fuel tank routine is even worse becuase they WILL flood it a few times before getting the hang of it.
Old 05-22-2007 | 09:57 AM
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Default RE: Fuel tank without primer


ORIGINAL: jwan

yep, thanks myrcsupply, u been a great help. wasn't too sure about the primers, but i think i'll definatly be getting one of those.

No Problem. My main point of this was to inform you that the old savage tank with primer was replaced with the primerless for a reason. And your best bet for a priming system is the Ofna unit becuase its a 2in1. replaceable filter, and primer bulb.
Old 05-22-2007 | 11:30 AM
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Default RE: Fuel tank without primer

I didn't know those primers existed! I'm going to have to get one on order.....because, ahem, I've been known to flood my engine from time to time using the "stinger plug" method. Thanks for the info.[8D]
Old 05-22-2007 | 11:35 AM
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Default RE: Fuel tank without primer


ORIGINAL: gravediggerracing

I didn't know those primers existed! I'm going to have to get one on order.....because, ahem, I've been known to flood my engine from time to time using the "stinger plug" method. Thanks for the info.[8D]
No Problem, Glad i could help
Old 05-26-2007 | 10:00 AM
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Default RE: Fuel tank without primer

This thing is nice! 3 squeezes and the line is primed. This is totally fool proof....so much so that I don't understand why all nitro trucks, cars, etc don't come with one from the factory. Anyways, this is a ingenius part and if you have problems priming your engine, by all means pick up a couple (one to have as a spare).

Old 05-26-2007 | 10:05 AM
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Default RE: Fuel tank without primer

Nice, Im glade you like it.

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