Think I have a governor timing problem

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Jakeh9890
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Think I have a governor timing problem

Postby Jakeh9890 » Wed Jun 28, 2017 6:24 am

I have a 71 154 and it runs great but it won't throttle up under load. I can pull on the throttle linkage and it'll rev up and then the governor pulls back but if I try and go in 3rd gear it'll stall because it just won't throttle up. All the governor arms are free so nothing is stuck

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John *.?-!.* cub owner
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Re: Think I have a governor timing problem

Postby John *.?-!.* cub owner » Wed Jun 28, 2017 11:25 am

governor timing is not very critical unless you have a magneto. With distributor you can compensate for it being out of time. The first thing I would check is the cross shaft that runs across the front of the engine from left to right. Having wear in it or in the key where it enters the governor is not unusual, and even a tiny bit of play will cause big problems with speed control.
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Jakeh9890
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Re: Think I have a governor timing problem

Postby Jakeh9890 » Wed Jun 28, 2017 3:12 pm

Ok. The shaft seems pretty good and the key is in good shape as well. What else could it be?

Eugene
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Re: Think I have a governor timing problem

Postby Eugene » Thu Jun 29, 2017 6:04 am

Explain what you mean by it won't throttle up. Do you mean that the engine won't increase rpms when you put a load on it?

Complete tune up including compression tests?

Tac, check engine rpms?
I have an excuse. CRS.

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Re: Think I have a governor timing problem

Postby staninlowerAL » Thu Jun 29, 2017 9:50 am

Disconnect the throttle cable at the lever on the cross shaft where the throttle cable attaches. Does the cable move freely when disconnected? The lever where the governor spring attaches must also move freely on the shaft. It's not unusual for this lever to "freeze up" due to lack of lubrication and maintenance over time.

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Re: Think I have a governor timing problem

Postby Larry B » Thu Jun 29, 2017 11:30 am

If the linkage is in good shape and the engine has adequate power then the throttle control is just not pulling the spring hard enough. There is a spring about an inch in diameter that is pulled by a pivoting plate connected to the throttle control. The more tension on the spring the higher the rpm. Spring may be weak or control not pulling it far enough. Do you have a tach?

Jakeh9890
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Re: Think I have a governor timing problem

Postby Jakeh9890 » Thu Jun 29, 2017 9:54 pm

Ok had my dad help me and we got it all set. The original problem was a froze up throttle arm but I had fixed that. We set the timing properly which was off a bit and I had to tighten up the adjustment on the throttle cable more and now she's revs right up under load and will hit target rpm! Thanks guys


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