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Prodrive

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Looking for a little Prodrive help. Got 36 hp prodrive that is about four years old. Replaced the propeller recently as it was missing 1' of diameter. With the worn prop, the engine was turning 3600-3700 rpms with a light load, correctly trimmed. With the new prop, I'm now turning 3200-3300 and going very slow. I adjusted the high speed governor screw and now turning 3800, but I am now idling >1600 rpm. When adjusting the low speed screw, tightening down on it speeds it up, but unscrewing it does nothing. It seems to me that some further adjustment needs to be made to the speed settings??trying to narrow the problem down. Someone mentioned lapping the valves?

Any help is appreciated.

Thanks
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   Bud Light
Post your question on mudmotortalk.com. There is a wealth of knowledge on that site about mud motors. You just have to sift through the brand bias. Ohif you never had a leak down test on the heads, get it done. And I sure valves need adjusting.
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Is the adjusted governor rpm under load at 3800rpms? Are you positive you have the same pitch prop as you had when you purchased the motor? 1' of diameter is a lot to lose i would think.
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The 3800 is under a load running correctly on the high end but way too high on the low end. Adjust the 'idler' screw and does not slow it down
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if the prop is same pitch is it the coated prop u bought????
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   Ricky Pon
Assuming that it was running fine before you switched props.

Air leaks seems to wreak havoc on these motor's idle settings.
Spray carb cleaner around the gaskets and see if the Rpm changes. If it does, then this is part of the problem.

After you think the governor is correct, start messing with idle screw. As far as the screw not returning, the spring inside may be worn. But I'm not too familiar with the internal arrangement.

I saw one time where the throttle cable was under too much pressure from clamps. This caused the throttle to not be able to return fully.

Checking to see if this is the right peop is a good idea but if you are running the motor out of water in neutral then that should Eliminate that variable.

Clean your linkages and returns real good.

Kind of scattered thoughts but in thinking and typing at the same time. I would bring it in if none of this works.
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   JIMMY W
Its your idle return spring,It is gone or the tab needs to be bent,Then you can turn the governor back up ;) I will see about getting you a picture.Very easy fix after knowing what it needs!
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   JIMMY W
Here you go
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   JIMMY W
The red arrow pointing to the governor idle tab,Make sure you have that spring if you do bend that tab very little to tighten spring tension,If not get a spring and then turn your governor back up and you should be good to go.good luck
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BAYOUCOMMANDER please let us know what u find out!!! thanks!!!!
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