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Old Mar 19, 2010, 06:08 AM
Micro Man!
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Joined Dec 2009
490 Posts
Help!
HSP warhead, hard to start

Hey guys,

So i have this old hsp warhead lying around that is hard to start.

I want to sell it so i can buy this new heli that i want, but i don't think anyone new to the hobby could start it. It takes me like 10 minute, and i have a real knack for small engines.

Here we go:

-Take it out, the glow plug is fully charged...

-I prime the engine (which is very sensitive on this model)

-stick the plug in, wait a second or two and rip the recoil.

-it is always very hard to pull, but it is not flooded, i can't figure it out.

-then i have to take the glow plug out tip it up side down and rip it a few times (nothing comes out).

- when i rip it it goes for like 2 seconds then stalls, but i have the throttle trimmed fine.

-then it may start after like 20 rips and then runs great.

But i can't figure out why its so hard to start...

I can't sell this to a beginner, they'll smash their head off a wall. It frustrates me a bit and i'm a hobby guy with a fair amount of patients.

any help appreciated.

Thanks

MF
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Old Mar 19, 2010, 06:09 AM
Micro Man!
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oh ya, how much do you think for a used warhead? 150 range?

Thanks

MF
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Old Mar 19, 2010, 12:50 PM
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Post a few pics. That sounds like a good starting price You can still get parts for it put it up you never know.

The hard starting is kind of different I have had a few of those. What kind of fuel are you running? What percent of nitro? How are you priming the engine. You said you take the glow plug out to prim it?
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Old Mar 19, 2010, 12:55 PM
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I think the optimum word here, and the root of your problem, is "old."
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Old Mar 19, 2010, 10:18 PM
Micro Man!
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Hey guys, Its a year "old" but i have treated it with care. and always used after run.

I will post some pics when i get back from my holiday.

The fuel is "backyard basher" i think its 20%???? but not sure. It was recommended by my LHS, who i have come to trust very much.

Its almost like it needs to be flooded to start.

I prime by putting my finger over the pipe and riping a few times with the plug in.

Thanks

MF
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Old Mar 20, 2010, 09:15 AM
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I wonder if a little hotter glow plug will help. Has it always started like this? The extra fuel will add compression to the cylinder. I wonder if the piston and sleeve are getting worn out.
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Old Mar 20, 2010, 09:48 AM
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Quote:
Originally Posted by Microflyyer View Post
Hey guys, Its a year "old" but i have treated it with care. and always used after run.

I will post some pics when i get back from my holiday.

The fuel is "backyard basher" i think its 20%???? but not sure. It was recommended by my LHS, who i have come to trust very much.

Its almost like it needs to be flooded to start.

I prime by putting my finger over the pipe and riping a few times with the plug in.

Thanks

MF
The "age" of an engine has nothing to do with it, instead it's how many hours of runtime that are relevant.


Honestly, if you trust your LHS's product advice so much I would suggest taking it down to them and saying - "if you recommend this fuel, perhaps you can show me how to start my truck using it."
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Old Mar 21, 2010, 12:54 PM
Micro Man!
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Quote:
Originally Posted by mredzadventure View Post
I wonder if a little hotter glow plug will help. Has it always started like this? The extra fuel will add compression to the cylinder. I wonder if the piston and sleeve are getting worn out.
Im using a medium temp glow plug.
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Old Mar 21, 2010, 12:56 PM
Micro Man!
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Quote:
Originally Posted by mini-Rob View Post
The "age" of an engine has nothing to do with it, instead it's how many hours of runtime that are relevant.


Honestly, if you trust your LHS's product advice so much I would suggest taking it down to them and saying - "if you recommend this fuel, perhaps you can show me how to start my truck using it."
I honestly don't think its the fuel.

Once it is started it runs great. Its just getting it going.

Thanks

MF
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Old Mar 21, 2010, 01:05 PM
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Man that's a tough one. It's like the engine needs the extra fuel and compression to get going but when it get's to temp it's fine. How are the seals around the carb?
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Old Mar 21, 2010, 09:12 PM
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USA, WA, Bonney Lake
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hmm, that is odd. when that happens to my nitro it's due to a bad glow plug, and i use a roto-start so i can just crank it untill it starts. but your glow plug is fine, which means it's somethin else. you might wanna get a new piston and sleave, something is causing it not to compress consistently. or just prime it a lot more. not to the point of flooding the engine, but enough to ensure it starts. and then if that solves it and you selll it be sure to write down in the manuel that it needs to be primed a lot.
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Old Mar 24, 2010, 05:58 PM
Micro Man!
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Quote:
Originally Posted by mredzadventure View Post
Man that's a tough one. It's like the engine needs the extra fuel and compression to get going but when it get's to temp it's fine. How are the seals around the carb?
Thats what i was starting to wonder. It doesn't have more than 4 hours engine time on it.

Maybe it is the seals.

I don't know why that would make it need the extra fuel in the engine???

I will check the seals.

MF
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Old Mar 24, 2010, 06:00 PM
Micro Man!
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Jet: Ya i would feel to bad to sell it to a newbee in this state.

I guess i could take it into the LHS.

MF
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Old Mar 24, 2010, 10:27 PM
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The seals around the carb are cheap. I guess if you show the person how it starts and let them try that is about the best you can do.
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Last edited by mredzadventure; Mar 29, 2010 at 10:27 PM. Reason: cant type
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Old Mar 29, 2010, 12:53 PM
Micro Man!
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ya, true.

It still starts, its just hard.

Maybe thats what i'll do.

Thanks

MF
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