Eska 5.5 Sears Ted Williams Won't Run Full Power.

[Rogue2]

Re: Eska 5.5 Sears Ted Williams Won't Run Full Power.

Okay, I'm new to this so be nice. Why is it the motor runs full power in the test tank but when it's on the water (behind the boat) the performance changes?

 

[mrcrabs]

Re: Eska 5.5 Sears Ted Williams Won't Run Full Power.

exhaust back pressure, in the test tank she just blows a hole in the water (ventilates) and in the lake she's got to push rather than spinup and blow out and it pulls more fuel because its working harder

 

[Rogue2]

Re: Eska 5.5 Sears Ted Williams Won't Run Full Power.

Makes sense.

 

[Tom @ Buzzard Bluff]

Re: Eska 5.5 Sears Ted Williams Won't Run Full Power.

Have you checked fuel flow like mrcrabs suggested yet?

 

[Rogue2]

Re: Eska 5.5 Sears Ted Williams Won't Run Full Power.

So I'm back to square one. After all the carb cleaner worked it's way through the gas we are back to only being able to go about 3/4 throttle. Is this a jet issue? I'm thinking it was working well with the carb cleaner in it due to octain boost.

 

[Tom @ Buzzard Bluff]

Re: Eska 5.5 Sears Ted Williams Won't Run Full Power.

So I'm back to square one. After all the carb cleaner worked it's way through the gas we are back to only being able to go about 3/4 throttle. Is this a jet issue? I'm thinking it was working well with the carb cleaner in it due to octain boost.

Did you ever get access to a manual? You need to back up to square one and go thru the entire tune-up process again. Don't make ANY assumptions! Verify that everything is set to recommended tolerances.

You said you had the carb adjustment at 6 turns out from fully seated but not whether you were referring to the High speed or Low speed jet. But that's waaaaaaaay too much in either case. If everything is at spec it shouldn't even run like that!

More & more it sounds like it has fuel flow issues, i.e.: starving out after it can no longer keep up with fuel used from the bowl. Pull the fuel line loose at the carb and watch the flow of at least a pint of fuel to see if there's issues.

It could also be a coil or condenser starting to fail once it gets hot. Or something as simple as grease from your own fingers on the points is preventing good spark. Clean the points by dragging a business card or strips from a heavy Kraft paper bag thru them repeatedly.

You may have damaged jets caused by someone 'cleaning' them with a wire or drill bit. If so you'll never get it to run right until the jets are replaced.

It could be as simple as a restriction in the fuel screen on the tank fitting that the gas line attaches to or in the fuel petcock. If you haven't replaced ALL fuel lines do so before you do anything else. Check the vent hole in the gas cap too. If your 'fuel system' isn't **** & span from vent to crankcase you're pi$$ing up a rope.

Or you may simply be running a fuel mix with insufficient oil in it. Double check the fuel/oil ratio recommended and follow it TO THE LETTER! Pay NO attention to mix ratios on the oil container. You're not powering your boat with an oil bottle so use the mix recommended by the ENGINE designers!

You're simply missing something. There have been enough good suggestions made on this thread that you should have resolved the issue by now IF you have followed them all to the letter.

Only YOU can fix it. We can only offer suggestions dictated by our own previous experiences or logic derived from them. Don't allow it to beat you!
You CAN do it if you're exact and methodical.

 

[Rogue2]

Re: Eska 5.5 Sears Ted Williams Won't Run Full Power.

I think I found it. I pulled the carb off and started at the bottom. My brother told me the bowl was leaking at his house so he tightened up the nut on the bottom that holds the pin for the main jet. I noticed the fiber washer was all but destroyed. When I pulled the bowl off and threaded the bolt back in as though it was holding the bowl on, I noticed the inlet would be almost completely cut off.

This would explain a lot. It explains why the idle is fine and the motor is easy to restart by just setting the throttle back to the start setting. The pickup for the idle setting was clear and functional. When I would try to engage full throttle, therefore needing the main jet inlet to be clear and open, the motor would die from too much air and not enough gas due to this pinch point.

I purchased a couple 3/8 fiber washers and they appear to place the inlet hole in the right position, free and clear to take in fuel for the primary jet to take over. I think there must have been a bit of fuel getting by, but not much.

I briefly fired it up to make sure it still runs and then shut it down. I will have another chance to try it at the lake Friday. Should be interesting to see what happens.

 

[Tom @ Buzzard Bluff]

Re: Eska 5.5 Sears Ted Williams Won't Run Full Power.

Sounds like you may be on the right trail!

 

[Rogue2]

Re: Eska 5.5 Sears Ted Williams Won't Run Full Power.

So I took it to the lake today. It was funny, it did much the same thing until I let it run for three or four minutes to warm up. At that time It would run full power just fine. The other odd thing, is even if the motor was off for only a few minutes, I would have to go throught the same thing again. I'm wondering, could this be a piston ring issue? Maybe it won't generate enough vacuum to really activate the main jet until the piston gets a little tighter due to heat expansion?

I guess I shouldn't complain. It runs, and runs well once warm.

 

[Rogue2]

Re: Eska 5.5 Sears Ted Williams Won't Run Full Power.

Just wanted to say thanks to all who chimed in to help me with this issue. Went out fishing in East Canyon Res. on Tuesday with a friend. Not a single problem. This little motor runs nice and smooth now. Caught a few trout. It was a nice relaxing day. Thanks again!