Predator 79cc - Engine Adjustment - Snowblower Forum : Snow Blower Forums
 
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post #1 of 7 Old 01-08-2018, 06:22 PM Thread Starter
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Predator 79cc - Engine Adjustment

Hello,

I recently repowered my Toro power clear 180 with a predator 79cc. After some modifications it seems to be running great. It was way under powered out of the box and could barely throw snow at all. I did have to remove the throttle lever and I'm not sure if it matters of the orientation. Seems like it's functioning just like it did before. Does anyone have a picture up close with the spring attached so I can make sure they are going in the correct holes?

Also please take a look at these pictures. I did adjust the screw on the throttle lever. Seems to give it some more power. I also had to adjust this barely visible screw on the carburetor so that it could not keep hunting/surging. Once I let it run for 5 minutes or so it doesn't seem to want to search anyway. Cleared around 3" off our large driveway today and it seem to run great. Anyone seeing a problem doing what I did with the adjustment screws?
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Last edited by gibbywmu; 01-09-2018 at 10:19 AM.
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post #2 of 7 Old 01-09-2018, 08:58 AM Thread Starter
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Anyone at all?
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post #3 of 7 Old 01-09-2018, 10:12 AM
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Garage
I don't have a predator so take that into consideration. The long silver screw appears to be the upper limit screw for setting full governed RPM. The smaller screw appears to be for idle.

Do you have the manual and have you looked to see if these are detailed in there someplace ?? I would warn you against exceeding the RPM limit of the engine. It might throw snow like crazy but only do it for a few outings at an excessive RPM.

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Make sure the windows are up before the snow plow goes by !!

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post #4 of 7 Old 01-09-2018, 10:24 AM Thread Starter
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Unfortunately the manual does not go into any detail..........especially in regards to adjusting that throttle lever screw and the carb screw. I'm sure I can look up the Max engine RPM, but there is no way to tell what RPM the engine is currently at. If I don't adjust to it to this level, its almost useless using the snowblower since it can't throw the snow far enough.................so I guess you could say I'm risking it, but again the engine doesn't sound like its over revving or working that hard.
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post #5 of 7 Old 01-09-2018, 11:49 AM
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only way to tell what the engine rpm is would be to hook up a tachometer. I have in the past with different engines done the same as you did. most of the time 3600rpm was not exceeded but a couple of times it was. for once in a blue moon use these are cheap enough.

https://www.walmart.com/ip/Digital-E...&wl13=&veh=sem



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post #6 of 7 Old 01-09-2018, 01:01 PM Thread Starter
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Thanks storm. I'll try backing off that carb screw again, but I'm sure I that throttle limit screw needed to be adjusted to give the engine some more umph. The reason I adjusted the carb screw was because when I would increase the throttle, it kept wanting to surge and come back down to the lower speed. Maybe I just needed to let the engine warm up further, so I'll do that again and try backing that carb screw off.
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post #7 of 7 Old 01-09-2018, 01:41 PM
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Glad you got it working for you. I'd let it warm up a few minutes before putting a load on it. I'm sure that engine is jetted for warmer temperatures.
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