I just had my motor serviced by Gatortrax this past week. Took the kids fishing the motor seemed to running fine except my rpms are a little low around 3500 at full throttle under load.

Today I went fishing by myself and I went to get on plane and the engine started to stumble. I held the throttle for a few seconds to see if it would clear out. It would only get to 3200 rpms. It was stumbling coming up to rpm. Not knowing what is going on I just idled around and did my fishing.

When I got home I checked for spark. Both cylinders are firing. I can rev it to about 3750 under no load sounds fine. With the engine just Idling it will gradually increase rpm to about 1700 to 1900 which it way to high. When the rpms start to climb I tapped the throttle and the motor will drop down to 750 rpm then in a few moments climb back to 1700+.


Can anybody shed some light on this.

What was it doing before you took it to GT and what did they do?

My boat was sitting up a few months during this past deer season. I tried to start it a 2 weeks ago and would not start. I poured some gas into the carb to see if it would fire. It started right up. Took the carb apart cleaned it. And would not start problem was the fuel solonid.

I had a stress crack on my transom so I brought it to gatortrax to have the transom replaced so while it was there let the mechanic there do the engine tune up. Well I am pretty pissed off with the mechanic he did not do what needed to be done. I had taken apart and the air cleaner assy and left it the bolts loose. well I had to tear it down again and what I found was the way I had left it bolts were just hand tight not torqued down. They just changed the solenoid changed the oil and new filter. I had specifically told him that the seals and the bushing needs replacement. When I got back to the house I turned the prop and I could hear the the tension springs that hold the seal are still rubbing the shaft collar. He did not replase the gasket that seats the carb to the air cleaner assy.

I told him that the motor it turning 3500 rpm before I could turn 3700 approx. And the Idle is surging.

The last time I used it before the deer season it was running 3500 rpm.
and the Idle was surging some.

I adjusted the govener this afternoon and had it running at 4100 rpm.
some of my linkages need to be reajusted there is some play.

Assume you have a stock carb. Check out this link:

viewtopic.php?f=3&t=16355

yes its completely stock.

Yes I saw the post eariler today and followed the instructions. I have slop in the linkage that goes to the carb arm. I also might have a bad fuel line I will change that out also. I pulled off the rocker covers to see if anything was out of place. Broken spring etc.

As for the seals that ride on the driveshaft. I replaced them myself for about 8$ the first time. The bushing was rusting I recut the surface on a lathe I will order a couple to have on hand. The seals You can get them at any bearing supply stores. muddbudy will not sell you the seals separate the sell the cap around 85$.

I was wrong thats about the right price.

I have the 2006 version. It does have a washer. My problem is the spacer is rusting wearing out the seals. My gearcase was replaced right at 50 house of running the my rig. The 2nd case I have on it now has the same problem. Now I check it every time I run it. Right at 50 hours on this case the seals were shot again.

All I am doing with it is going fishing and rarely run through anything that a regular outboard would go.

When I get the motor straight Its going for sale. 2 lower units right at 50 hours something is wrong. Next one will be a gatortail.

My 06 model didn't have the spacer & the only time I had a seal problem it was because I put too much grease in & blew out the front seal. Try takin it out & see if that corrects the problem.

I came here for help. You can kiss my ass. Finger back at you.

Dude, calm down. He's got a point, you didn't replace the stock parts with stock parts (the seals you used were close, but not exact most likely) and you alterred the shaft by milling it on a lathe (changin the original size slightly). Those 2 things combined most likely caused your leak the 2nd time. You say you came here lookin for help, well the most experienced MB guy on here is DB & ya just told him off. Good luck with your motor, but until you replace the seals (& now the shaft) with the right ones your problem aint gonna just magically fix itself.

damn....you kinda stepped on your meat. you just shut the door on a wealth of information.

Wow Gary what did you do

Being new here and making 1 post your gonna put that crap about me bitching is completely wrong.

I did NOT DO SQUAT to the seals till after the 2nd gearcase seals started to fail. Both lower unit seals started to fail at approx 50 hrs.
Then I hacked .020 off the O.D. to clean up the seal area.

I already found the problem with the motor. So I will stop bitching.

Glad you got your stuff fixed. Do you do machine work on the side?

I do not do it one the side but if you in a bind I might be able to help. If its a big project I cannot I just do not have the time. I have been looking for a small mini mill (haas) they are getting more and more affordable. That would be perfect for 3d countouring intakes manifolds ect.

I program the parts and design workholding fixturing . I have been doing this for 20 years.

I like design and machine lure molds. We are very buisy at work I have not made any in a while. Too wore out at the end of the day.

Right now I am repainting the floors and deck of my boat. I just finished taping the boat up will be ready for spraying tomorrow.
I wore all the paint of fishing.

LOL love your avatar!!!!!!!!!!!!!!!!