Bad Gas?

[rmulv]

This past weekend i was out on my boat for a good three hours... on my way back to the dock a few larger boats flew by making some larger waves as i (in my 18' 2000 Stingray RS) was going a good 25-30mph, i hit some of the waves hard and then about a min or so later i noticed that i had the throttle down almost the full way and it was only going about 10mph. (when realisticly it shoudl have been going a good 30-40mph) It almost sounded like it was not accelerating after a certian point. I knew that on the way back that if i cut back on the throttle the engine would stall. I got close enough to the dock to test that out and then brought the throttle down and it indeed stalled. I started it up again and it was still running rough but not as bad. I noticed that it was stalling when i was not having more pressure on the throttle. I ended up trailering it back to my driveway and ran it after i hooked it up on the hose. It seemed like it was running normal again but i think that i might have gotten bad gas or had a water pocket burst in the tank when i hit that wave. ANy ideas?

The motor is standard for the boat: 135hp Mercruiser i/o

Thanks

 

[familyguy]

Re: Bad Gas?

Not quite sure what a burst water pocket is, but first I would go to the carbuerator linkage where it connects to your throttle cable and check to see if you have a full range of movement at this linkage site when you move your control handle through its throttle range without the engine running. Good luck.

 

[rbh]

Re: Bad Gas?

OK then
remove old fuel make sure you have a new o-ring around cap, breather line has 360 degree loop.
start there.
rob

 

[familyguy]

Re: Bad Gas?

Since this started right after you hit some large waves in a small boat going 25 mph it seems likely you may have jarred something loose with the ensuing jolt. In many boats the throttle cable is not well supported along its entire length from the remote control handle to the carburetor and I have noticed even small manipulations of this cable will affect idle speed. If you are getting a full range of movement on the carburetor throttle lever bracket with compensatory movement of the control handle then you at least ruled out a simple causes like throttle cable damage where it connects to the control handle, along its length, and where it connects to the carburetor bracket. I would start there. It takes seconds to check.