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Why won't it fire up?

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Old 01-01-2008, 04:44 PM
  #1  
zud00
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Default Why won't it fire up?

Trying to get my Savage to start but it just won't fire. I've already ran about 4 gallons thru it. I'm using the roto start and I crank and crank and crank but it won't ignite. I've taken out the glow plug and tested it and it is fine. The batteries in my roto start are fine. When I crank it the engine will turn over. I've even put a little fuel in where the glow plug goes but it still won't fire. After cranking for awhile, a few times the piston has got stuck at BDC and then I release it by hand. Anyone have any ideas????? I"m perplexed.
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Old 01-01-2008, 05:02 PM
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mazdab2600
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Default RE: Why won't it fire up?

to rich or to cold?
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Old 01-01-2008, 05:11 PM
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zud00
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Default RE: Why won't it fire up?

I'm trying to start it inside the house so the temp is fine. pulled the airfilter off and looked at the carb. with the receiver on i gave it some throttle and fuel didn't seem to be pouring in or anything.
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Old 01-01-2008, 05:13 PM
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SOILWORK
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Default RE: Why won't it fire up?

Can you turn the flywheel a full rotation easily with your fingers. You might need a new piston and sleeve. Also check for airleaks in the tank, fuel and pressure lines and the engine itself.
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Old 01-01-2008, 05:14 PM
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Muggy250r
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Default RE: Why won't it fire up?

pour some gas in te carb, put the filter back on, put the ignitor on and turn it over... that would prob do it, or set it back to factory settings and go from there... and check the plug
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Old 01-01-2008, 05:23 PM
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zud00
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Default RE: Why won't it fire up?

Well, i tried putting fuel in the carb and it didn't work. The flywheel has gotten stuck a few times and when it does, it is hard to turn by hand. I used a screwdriver to get it to move and then once it was moved, it moved pretty freely.

Another thing is that it is making a like rattling sound when i turn it with the rotostart. it doesn't make that sound when the glowplug is out, but when it is in it makes that weird sound.
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Old 01-01-2008, 05:31 PM
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Muggy250r
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Default RE: Why won't it fire up?

time for a new motor sounds like [:@]
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Old 01-01-2008, 05:42 PM
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Default RE: Why won't it fire up?

are you sure the owb is not slipping?
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Old 01-01-2008, 05:46 PM
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Muggy250r
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Default RE: Why won't it fire up?

dunno...pull it apart and lcean it
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Old 01-01-2008, 06:50 PM
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Default RE: Why won't it fire up?

id suggest taking the backplate off and having a look inside, sounds as if a rod bushing might of let go, or 1 of your bearings has shat its self, both could cause locking up at BDC, as it would alloy the rod to grind on the bottom of the crankcase
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Old 01-01-2008, 09:37 PM
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Default RE: Why won't it fire up?


ORIGINAL: zud00

Well, i tried putting fuel in the carb and it didn't work. The flywheel has gotten stuck a few times and when it does, it is hard to turn by hand. I used a screwdriver to get it to move and then once it was moved, it moved pretty freely.

Another thing is that it is making a like rattling sound when i turn it with the rotostart. it doesn't make that sound when the glowplug is out, but when it is in it makes that weird sound.
yupp new motor same happened here last summer
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Old 01-01-2008, 09:47 PM
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Muggy250r
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Default RE: Why won't it fire up?


ORIGINAL: SaVaGe MaN SS


ORIGINAL: zud00

Well, i tried putting fuel in the carb and it didn't work. The flywheel has gotten stuck a few times and when it does, it is hard to turn by hand. I used a screwdriver to get it to move and then once it was moved, it moved pretty freely.

Another thing is that it is making a like rattling sound when i turn it with the rotostart. it doesn't make that sound when the glowplug is out, but when it is in it makes that weird sound.
yupp new motor same happened here last summer


[:@][:@][:@] i hate being right on thins like this [:@][:@][:@] but i also getting a new motor this week
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Old 01-01-2008, 10:40 PM
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zud00
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Default RE: Why won't it fire up?


ORIGINAL: iamnot

are you sure the owb is not slipping?
If this was the case, wouldn't the roto start keep spinning and the motor wouldn't turn over? Well the motor continues to turn over.

I guess i'll take it apart sometime and see if i can find the problem. I've never taken the motor apart so I guess I'm in for an adventure.

I would love to buy a new motor but right now I don't have the money. Hopefully when I take it apart I'll find the problem, the only problem is that I'm not sure what I'll be looking for...bad bearings, bushings?
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Old 01-01-2008, 11:30 PM
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Default RE: Why won't it fire up?

4 gallons of fuel and he already needs a new motor? How long do these motors typically last? That just doesn't seem like you get alot of use before they blow.
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Old 01-01-2008, 11:58 PM
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DaveG55
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Default RE: Why won't it fire up?


ORIGINAL: Griffsred

4 gallons of fuel and he already needs a new motor? How long do these motors typically last? That just doesn't seem like you get alot of use before they blow.
That depends on a whole lot of factors. Some the user can control, some he cannot.
I've had engines fail on the second tank of fuel and I have one OS engine that is literally 20+ years old.
A poorly tuned, hard run engine can easily fail after a gallon or two. A well tuned engine that is cared for and not run flat out every second can last for 10 - 12 gallons or more. But even well cared for engines can fail at any point, it's all the luck of the draw.
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Old 01-02-2008, 01:55 AM
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Default RE: Why won't it fire up?

ORIGINAL: DaveG55


ORIGINAL: Griffsred

4 gallons of fuel and he already needs a new motor? How long do these motors typically last? That just doesn't seem like you get alot of use before they blow.
That depends on a whole lot of factors. Some the user can control, some he cannot.
I've had engines fail on the second tank of fuel and I have one OS engine that is literally 20+ years old.
A poorly tuned, hard run engine can easily fail after a gallon or two. A well tuned engine that is cared for and not run flat out every second can last for 10 - 12 gallons or more. But even well cared for engines can fail at any point, it's all the luck of the draw.
ha ive got an old 19 year old motor in my vintage 1/5 raco jac rabbit buggy still runs like new
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Old 01-02-2008, 11:13 PM
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Default RE: Why won't it fire up?

I can't get the backplate off because the hex driver tip broke off into one of the heads of the screws. But I have the cooling head off and glow plug out and when i turn the flywheel, there is a clicking noise at almost BDC everytime the piston passes that point. If i could get that last screw out then I could get the backplate off and take a look inside.
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Old 01-02-2008, 11:53 PM
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Default RE: Why won't it fire up?

the clicking at bdc could be the little pin that goes into the roto start turn the motor the way it would if you were trying to start it.


hope this helps
p.s. if you take the sleeve out wedge a tooth brush between piston and sleeve or just some thing softer than any metal
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Old 01-04-2008, 03:24 PM
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Default RE: Why won't it fire up?

my tamiya made a clanging sound wheen my plug was in turns out i needed a new flywheel
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Old 01-06-2008, 04:58 PM
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Default RE: Why won't it fire up?

Well try taking your backplate off then on the piston, there is a little pin and a spring, see if your pin or sprin are missing or not in the right spot!. because I had the same thing happen to me and I looked in there and found it jamed in the pistions way so that it wouldnt turn over so i pulled it out put it in the right spot put everything abck together and fired it up and bam it worked fine!!!
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Old 01-06-2008, 05:09 PM
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Default RE: Why won't it fire up?

I finally got the back plate off today after spending some time grinding in the screw head that had my broken hex driver tip in it. I found the problem.....a broken crankshaft. So I'm going to call HPI and see if there's any chance they will replace it. Here's a pic:
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Old 01-06-2008, 10:04 PM
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Default RE: Why won't it fire up?

well THERES you're problem LOL
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Old 01-06-2008, 10:38 PM
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Default RE: Why won't it fire up?

Yea that'll do t. I would deff. get some brake cleaner and clean all that crap off while the motor is torn down. Then spray it all down with wd-40. If you think the piston and sleeve have enough life left in them, then just buy a new crank. but after 4 gallons and a new crank. Something else might let go..
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Old 01-06-2008, 10:47 PM
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Default RE: Why won't it fire up?

I think i'll probably go with a new engine. I've still got some christmas money left and I want something with more power than that .25.
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Old 01-06-2008, 11:00 PM
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Default RE: Why won't it fire up?

Axial .32 is good for the price. Not the best motor but not the most expensive either.
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