engine gets weaker at full throttle; strong at half - Snowblower Forum : Snow Blower Forums
 
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post #1 of 8 Old 01-08-2015, 03:56 PM Thread Starter
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engine gets weaker at full throttle; strong at half

I forgot the name of the dial (not the choke level rabbit-turtle). It's the dial where you slowly turn after starting to get full throttle.

When I turn the throttle half way, it seems like it's at full power, but when I turn it all the way like you're suppose to, the engine gets weaker. The engine does not hunt or surge.

What's up with my Tory-Bilt 168CC?

sorry if it gets confusing; i don't know the name of the dial and lever .

Last edited by Fruggy; 01-08-2015 at 04:00 PM.
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post #2 of 8 Old 01-08-2015, 06:44 PM
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Sounds like you might still have partial choke engagement? With THR full open slowly turn the choke lever counter clockwise to see if the performance improves (or clockwise as the case maybe).
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post #3 of 8 Old 01-08-2015, 07:10 PM
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Quote:
Originally Posted by AverageJoe View Post
Sounds like you might still have partial choke engagement? With THR full open slowly turn the choke lever counter clockwise to see if the performance improves (or clockwise as the case maybe).
Better send a pic of what you see and trying to explain, make sure to be close enough to see properly.

Snow Removal Apparatus I own:
Ariens ST1530DLE, and good ole arm powered scrapper.
The 15 HP is a new Ducar engine sold
by Princess Auto in Canada.
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post #4 of 8 Old 01-09-2015, 03:32 PM
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It sounds like the choke knob dial, same as mine on my 179cc Troy-Bilt snow blower engine. Sounds like Fruggy might have a partially blocked carb and by running it choke rich it helps.

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post #5 of 8 Old 01-09-2015, 04:29 PM
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The "Rabbit - Turtle" lever is the THROTTLE and should be the only control you use to increase or decrease the engine speed...The [other] control is the choke, and should be closed for start up , then slowly opened...till fully open..Clockwise an CCW can be misleading until you see which direction is blocking or opening the airway..
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post #6 of 8 Old 01-09-2015, 04:38 PM
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+1 with ^^^ and report on your findings please.

Snow Removal Apparatus I own:
Ariens ST1530DLE, and good ole arm powered scrapper.
The 15 HP is a new Ducar engine sold
by Princess Auto in Canada.
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post #7 of 8 Old 01-09-2015, 07:04 PM
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Yeah could be that for sure, partial engagement.. if not check main jet for debris.
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post #8 of 8 Old 01-09-2015, 08:37 PM
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Is the exhaust outlet looking black, the choke can be the issue. If the outlet looks light in color good chance it is running lean, if light don't run it until you clean the carb.

Pretty old marine engine tech, now in marine parts.
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