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Old 10-22-2018, 02:23 PM   #1
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Default Surface drive help





I'm a new gatortail 37hdr surface drive owner on a 1756 G3 that already had the beavertail pods on it and have never had a mud motor before. Suggestions on getting this boat on plane with gear, seemed good on scouting day with no gear. Go hunting with 2 others, dog, 24 decoys is all, couple layout blinds and it plowed big time. Running 4000 rpm. I did have most weight in front which I would think you would want but maybe I'm completely thinking backwards than with my 25 hp outboard? I know I still need to play around with it but any help would be great. Motor is brand new. Thank you. Stay safe this year.
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Old 10-22-2018, 02:32 PM   #2
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Default Re: Surface drive help





Not an expert, but I'll bet those pods aren't doing you any favors. The consensus is (with surface drives) that pods are no good.

Weight distribution plays a big role with surface drives. You didn't mention what speeds you were seeing when you went scouting or what was in your boat. Was it just you when you went scouting? 3 guys, dog, decoys, layouts, and other gear is a decent load for a 17' boat, but I think that GTR should be able to move it better than what you're seeing. Denny will hopefully chime in, he's the resident expert with surface drives.
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Old 10-22-2018, 03:42 PM   #3
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Default Re: Surface drive help

IMO, the order of importance for your issues:
1. Weight
2. Weight distribution
3. Pods, they are robbing water from getting to the prop. As said, they aren't doing any favors.
4. The boat (in addition to #3)
a.Probably doesn't have the correct angle for the GTR to perform to its optimum capabilities. ~20 degree angle is what Gatortail uses.
b. Correct transom height. I assume that the motor is for a tall transom.
c. The ribs (not really a huge game changer)
5. Prop. Do you have 3 blade? A worked big blade may help.


If you add a 4th guy to my heavy GT boat my GTR doesn't like it, albeit, that was before Stage 2 upgrades.


You can read for days and days these issues on Mud Motor Talk, fyi. There is a similar thread on here, but I couldn't track it down in short order.
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Old 10-22-2018, 04:00 PM   #4
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Default Re: Surface drive help

Prop... 30-35 hours out of a prop is all you get... otherwise welcome to owning a surface drive... theyre so finicky with weight its crazy.. juice the motor up if ya wanna run good weighted down... I played the same problem until I just went ahead and put heads and exhaust on my old one... 2 guys light load would run mid 20s throw another guy and all his gear... idle speed and wouldn't get on plane... did the head work and 4 guys still ran mid 20s... and get rid of the pods for surface drives or buy a longtail... goodluck!!
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Old 10-22-2018, 05:01 PM   #5
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Default Re: Surface drive help

I have never run a surface drive, but all points have been talked about. The big long tail mud motors are not easy to run but they are getting better. I can get my boat on plain with 3 guys and a fat dog. It doesn’t seem to matter to much about weight
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Old 10-22-2018, 05:31 PM   #6
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Default Re: Surface drive help

If water was real shallow I would go in circles and try and get on a wave to get the motor to bite. If the water was deep I would go to the bank to get to shallower water, seemed it lifted the boat up and out of the water and when I was on step I would steer back to deeper water. Other than that it is a frustating thing!
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Old 10-22-2018, 05:53 PM   #7
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Default Re: Surface drive help

Might try to change gearing 32/ 34 top gear 50 tooth prop shaft gear. If Gator tail offers it then may be you could run a MB Hammer prop or GT fat blade, either one are good load props. Lower gearing would help carry your load better, and still keep motor in a safe operating rpm. Running lite you probably would be on Rev Limiter though. I'd also cut the pods off hull. G3s are heavy boats empty. Cutting back on all unnecessary weight will help also.
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Old 10-22-2018, 07:55 PM   #8
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Thanks all! I'm pretty new here and dont know how to respond to your posts individually....but I got some great suggestions and I'm sure the weight distribution played a huge role. I have a 2 blade prop on her and I did talk to GT today and they suggested playing with the tilt pin/bolt before I get too crazy with anything else. I raised it up one hole and it actually looks like its sitting more correctly when it's trimmed up and I believe that's what GT was trying to tell me that it will help raise that prop up to the proper water level? I had a hard time being able to see where the prop is in the water when running because of the huge cavitation plate, but I dont think I ever was able trim up high enough to get that prop at water level etc. Again thanks all I really do appreciate all of your input and not being jokers like a lot of other forums.
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Old 10-22-2018, 09:17 PM   #9
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Default Re: Surface drive help

Give it a shot. With our hard/sand bottoms in a lot of the state, the top is where mine rides. The bottom hole is for 4x4 and thick soupy mud (which we rarely see). You want the prop half in/half out of the water when you get it up on plane. Play with the trim till you start to loose speed and the RPMs increase.
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Old 10-24-2018, 08:08 PM   #10
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Default Re: Surface drive help

Pods are defiantly hurtin ya... smaller heavy boat is hurtin ya too. I’d get some work done to it. Do the simple stuff first heads rods etc. the. Go to the cam if that doesn’t help. I have a 4500 mud buddy on a 2060 phowler and I can run 5 people gear dogs blind everything at 20mph.
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Old 10-25-2018, 09:25 AM   #11
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Default Re: Surface drive help

Quote:
Originally Posted by drakeslayer23 View Post
Pods are defiantly hurtin ya... smaller heavy boat is hurtin ya too. I’d get some work done to it. Do the simple stuff first heads rods etc. the. Go to the cam if that doesn’t help. I have a 4500 mud buddy on a 2060 phowler and I can run 5 people gear dogs blind everything at 20mph.
My buddy has one of those 2060 Phowler rigs with a 36 Prodrive and I can't believe some of the loads it is able to get on step.
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Old 10-25-2018, 01:42 PM   #12
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Default Re: Surface drive help

off course ? I have a 2016 Yamaha 40 HP tiller and I cant get my boat on plane with 2 guys and gear no way my blind is that heavy? My question is would a 4 blade prop make a big difference i mean I am plowing I have 16ft xwide/deep coast gaurd front with pods.
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Old 10-25-2018, 02:53 PM   #13
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Default Re: Surface drive help

Quote:
Originally Posted by orangefeetdown View Post
off course ? I have a 2016 Yamaha 40 HP tiller and I cant get my boat on plane with 2 guys and gear no way my blind is that heavy? My question is would a 4 blade prop make a big difference i mean I am plowing I have 16ft xwide/deep coast gaurd front with pods.
Stick with a three blade and get the right pitch. I had a 1760 Xpress, blind, 3 guys, 70 or so decoys, 40hp 4 stroke Merc and could get on plane no problem.

If your mtr is running right and current prop isn't damaged I am guessing reduce pitch by at least 2. If you don't have a tach get one or you will be forever guessing.

For optimum performance you want the motor to hit 5700 to 5900 rpm at wide open throttle with boat loaded and just one person in it. Boat will jump on plane.
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