Predator 346cc (11HP) Engine Issues

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LGLDSR73

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It's been a week for things to break so I am not surprised I am writing this.

This is a new Predator 346cc engine. With some issues.

(1) Movement of the throttle results in no movement at the Carb. Zero, zip, nada, none.

(2) Please note the photographs of the nut. This nut will spin freely all day and all night. I can find NO reference to it in the exploded parts view. Absolutely none.

Also with respect to this nut, note the two small holes. Anyone have any idea what these are for?

I have not yet attempted to start the engine as I cannot see how on earth this is going to throttle up. Again, moving the throttle results in no movement at the Carb.

Any ideas, thoughts, suggestions?

Thanks,

Lyman
 

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devilsfutbol17

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The nut is for your throttle cable. You unscrew the top screw, then slide your cable through it and screw the top screw back down to clamp the cable. Its suppose to be able to spin freely.

I can't remember if moving that level will directly operate the throttle, or if it moves a spring that will move the throttle. My predator 212 would have the throttle open when its off, but when I go to start it the throttle closes.
 
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mckutzy

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The motor needs to be running for the movement to be seen. Im not too sure on how to describe this. It also connected with the Governor.
Id say start it and forget about. It will be fine if it is new. (for the most part, But they have a good track record so far)
 
OzFab

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The "throttle" lever moves the governor which, in turn, moves the throttle butterfly in the carb. The governor doesn't operate without the engine running
 
supermanotorious

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I agree with starting it then working the throttle although I don't think that matters, I'm constantly modding these engines and once the governor is removed I have to use a new spring I get at Ace Hardware to get the throttle return tension correct which doesn't restrict throttling

IMO you should've sprung the extra $50 for the 420cc engine with electric start, it's a shame that when HF moved from the blue Lifans to the black Predators their 11HP (346cc) engine didn't include electric start like the Lifans
 
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LGLDSR73

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devilsfutbol17 said:
The nut is for your throttle cable. You unscrew the top screw, then slide your cable through it and screw the top screw back down to clamp the cable. Its suppose to be able to spin freely.

I can't remember if moving that level will directly operate the throttle, or if it moves a spring that will move the throttle. My predator 212 would have the throttle open when its off, but when I go to start it the throttle closes.
Click to expand...

Thanks! I really appreciate the information!

Lyman
 
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LGLDSR73

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mckutzy said:
The motor needs to be running for the movement to be seen. Im not too sure on how to describe this. It also connected with the Governor.
Id say start it and forget about. It will be fine if it is new. (for the most part, But they have a good track record so far)
Click to expand...
Thanks. I began to wonder if that were the case. Thanks for confirming it!

Lyman
 
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LGLDSR73

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supermanotorious said:
I agree with starting it then working the throttle although I don't think that matters, I'm constantly modding these engines and once the governor is removed I have to use a new spring I get at Ace Hardware to get the throttle return tension correct which doesn't restrict throttling

IMO you should've sprung the extra $50 for the 420cc engine with electric start, it's a shame that when HF moved from the blue Lifans to the black Predators their 11HP (346cc) engine didn't include electric start like the Lifans
Click to expand...
I agree about the extra $50 being worth it, but the 212cc I had purchased went back. The holes in the mounting plate were so close to the edge that any given amount of stress would have caused that plate to crack.

When I went to exchange it they (HF) did not have any of the 212cc's left in stock, so they did an even exchange with the 346cc engine. I made out quite well :)

Thanks again.
 
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LGLDSR73

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Fabroman said:
The "throttle" lever moves the governor which, in turn, moves the throttle butterfly in the carb. The governor doesn't operate without the engine running
Click to expand...
Why is it that the governor will not function unless the engine is running?

Many thanks!
 
Brandon1023

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The governor is a gear inside of the engine which is driven by the camshaft, which is initially driven by the crankshaft. When the crank makes 1 full rotation, the camshaft has made 1/2 of a rotation, since the gear has double the amount of teeth. The camshaft then spins the governor gear, which has half the amount of teeth as the cam gear. This means the governor gear and the engines crank spin at the same RPM.

The governor gear, which is positioned inside somewhere near the engine's throttle lever, has a metal plunger and 2 small weights on it. As engine RPM increases, these weights pull harder and harder on the plunger, which tries to close the throttle enough to bring the max speed back down to somewhere around 3,600 RPM.

You asked why it is that the governor doesn't work when the engine is off, right? Well the governor gear doesn't spin if the crank and cam aren't spinning, and it doesn't do anything.
 
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LGLDSR73

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Brandon1023 said:
The governor is a gear inside of the engine which is driven by the camshaft, which is initially driven by the crankshaft. When the crank makes 1 full rotation, the camshaft has made 1/2 of a rotation, since the gear has double the amount of teeth. The camshaft then spins the governor gear, which has half the amount of teeth as the cam gear. This means the governor gear and the engines crank spin at the same RPM.

The governor gear, which is positioned inside somewhere near the engine's throttle lever, has a metal plunger and 2 small weights on it. As engine RPM increases, these weights pull harder and harder on the plunger, which tries to close the throttle enough to bring the max speed back down to somewhere around 3,600 RPM.

You asked why it is that the governor doesn't work when the engine is off, right? Well the governor gear doesn't spin if the crank and cam aren't spinning, and it doesn't do anything.
Click to expand...

Thank you very much for the detailed reply, very much appreciated.

What clutch do I want to buy for this? Any recommendations? As mentioned I am building a Go-Kart for my Grandson and am unsure what I need in terms of a clutch for the 346cc engine.

As far as the governor goes, back in the day one could defeat these. Is this still possible?

Thanks!
 
OzFab

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LGLDSR73 said:
As far as the governor goes, back in the day one could defeat these. Is this still possible?

Thanks!
Click to expand...

Yes & no... You can override them but, it's better to remove it completely.

Having said that, how old is your grandson? If he's only a little tyke, you may want to leave it alone...

LGLDSR73 said:
What have you done to loosen the play on the throttle arm? As new, it's bolted pretty tight and quite stiff
Click to expand...

Simply loosen the nut holding the arm
 
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LGLDSR73

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Brandon1023 said:
The governor is a gear inside of the engine which is driven by the camshaft, which is initially driven by the crankshaft. When the crank makes 1 full rotation, the camshaft has made 1/2 of a rotation, since the gear has double the amount of teeth. The camshaft then spins the governor gear, which has half the amount of teeth as the cam gear. This means the governor gear and the engines crank spin at the same RPM.

The governor gear, which is positioned inside somewhere near the engine's throttle lever, has a metal plunger and 2 small weights on it. As engine RPM increases, these weights pull harder and harder on the plunger, which tries to close the throttle enough to bring the max speed back down to somewhere around 3,600 RPM.

You asked why it is that the governor doesn't work when the engine is off, right? Well the governor gear doesn't spin if the crank and cam aren't spinning, and it doesn't do anything.
Click to expand...
Again, thanks. I've made a very short video of what I believe is the Governor kicking in. Note that when I pull the throttle lever to the left you can see the arm directly underneath the fuel tank move to the right and then snap back to the left; that is not me releasing the throttle. Am I correct? Many thanks.

The video is here:

http://youtu.be/DF0xpMG9Iz8

Lyman
 
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