Harbor Freight Predator engines
- Thread starter Rob the plumber
- Start date
- Tags engines freight harbor predator
@supernova, the throttle stop screw out of the box only let the throttle open a little over half way. It sounded like a generator on slightly high idle this way. Letting the throttle stop screw out let it rev higher. Am I missing something?
It rips pretty good the way it is, except that the engine cuts out for about a second intermittently. The engine also comes back alive in strange spots when rolling back on the throttle after coasting at 30 mph or so.
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It rips pretty good the way it is, except that the engine cuts out for about a second intermittently. The engine also comes back alive in strange spots when rolling back on the throttle after coasting at 30 mph or so.
Sent from my PC36100 using Tapatalk
Im trying to fix this problem right now too. All moving the limiter screw did was limit how fast I can climb to top rpm. But when ever I get to the top rpm I surge in and out. I have to clones on yellow DBs setup almost identical right now, and the one get as fast as the other and then surges while the other just screams with no surge. I cant figure it out. Im thinkin I need to rejet the idlejet. Anyone have suggestions? Im not privy on drilling it out. And I have no clue what size the stock jets are.
When it starts to surge, put your choke on a little and see if it gets better, I can almost guarantee its lean...most any carbed engine sold here is very lean because of emissions standards. If you have a nice big drill set, like a numbered one, you can most likely drill the main jet out a little at a time untill it goes away. Plus that doesnt cost anything but time :thumbsup:
and a digital cliper. my highjacking is done, sorry.
ErokOOO,
I have the same situation (surging at "full boogie") with a relatively new (stock) HF 6.5 clone. It starts and idles great, and actually runs quite well until you are at full throttle and try to maintain that speed/rpm, when it will begin to surge in and out. It will stop doing that when you back off on the throttle a bit. We will soon be upgrading the exhaust/header, air filter, and jet, and I am hoping that will cure the condition. Does that also sound like a lean condition to you guys?
I have the same situation (surging at "full boogie") with a relatively new (stock) HF 6.5 clone. It starts and idles great, and actually runs quite well until you are at full throttle and try to maintain that speed/rpm, when it will begin to surge in and out. It will stop doing that when you back off on the throttle a bit. We will soon be upgrading the exhaust/header, air filter, and jet, and I am hoping that will cure the condition. Does that also sound like a lean condition to you guys?