I built a longtail mud motor and I am having a problem. I am hoping that someone has had this problem before and knows how to fix it. When I am driving the motor I am constantly having to pull up on the motor. I can not keep the prop in the water without a lot of effort. Why is that? How do I fix that?

Your trim tab on your cavitation plate is bent the wrong way, try bending the tab right above your prop straight or with a slight upward angle, had to do it with my gdlt. Use a large crescent wrench and close it in the center of the tab at the end of the cav plate and bend it upward, I'm not sure how strong your welds are but that's a lot of bending since its pointing so far down but just watch not to pull the whole thing off.

Holy crap man that trim tab is bent way down there! Like stated above bend it up and you will be golden! Looks good BTW!

Thanks guys for the help. I will try that and see what happens.

lol

motor looks great!

but yeah - like said above ^^ your cav trim tab is downwards - bend it the other way - start slow - bend it 1/4" at a time and adjust from there.

Nice looking longtail! Did you use any plans on your build?

Nice looking longtail! Did you use any plans on your build?[/quote]
Looks like mabe mad mud motor plans may be?

I used the plans on ebay and a harbor freight motor. The motor is really loud. Any of you guys know how to put a muffler on one of those motors? I would like to get a better motor eventually, I just did not want to spend a fortune on a motor if this did not work out.

The one addition I have added since the first two photos you see is a bicycle grip to the end and a throttle cable.

Thanks for the help. I will change the trim tab and go from there.