Just a simple Nationwide Ban that they can't be making a Wake within 8 miles of a Shore would pretty much solve the Problem
At a Lake not too far from my City, there were lots of Smiling Faces, when several Wakeboard Boats had been visited by a Hole Saw
The Gap on the Plugs is in the Neighbourhood of 0.035" I asked can the Spark jump a 3/8" Gap, much larger, cause a Spark at 0.035" at Atmospheric Pressure really means nothing as little to no Stress is placed on the Ignition System.
So the Motor will only Start if it is at Full Throttle? Are...
So it is Pumping water at 1/2 Throttle(in tank, in neutral) and quits when you slow down? Is that 15 minutes total run time, or after it slows down?
Can you put your hand on the Top of the motor, or Cylinder Head?
Does the Paint on the Head/top of Block, look burnt?
Has the Head ever been off...
Idle Timing is Dynamic, as it is what determines the Idle Speed. The Carbs are fully Closed for a lot of the Throttle Movement, just cracking open at the Pickup Spec . Once the Timing is Fully Advanced do the Throttle Valves really start to open
Try running it Briefly, on a much Oil Rich Mixture. If it Idles Better, I would be looking at the Upper Crankshaft Seal. Also check for any Oil Recirculation Line from the Crankcase up to the Upper Bearing Area.
or Pull the Flywheel and look for Oil at the Seal Area
Are you running the Motor on Muffs, in a Tank, or on the Boat in the water?
If on Muffs, you would be able to see all the Places that water will exit the Motor, not just the Teletale(I really don't put much Faith in them, as they just indicate water makes it to the Powerhead, and little Else)...
Does it die after 3 minutes at all speeds?
Spraying Carb Cleaner into a Carb does Eff all, except clean the Throat and Throttle Valve.
If the Motor can't Idle, it is likely the Idle Circuit is Dirty, and a Teardown and proper Cleaning required
Other Things... Is the Spark strong enough at both...
The System is behaving like you have have engaged the Trailering lock, which is why Salty(no disrespect intended), suggested loosening the Tilt Tube.
Have you tried holding the Switch on, after the Outboard is all the Way Up, and all the way Down? If not, do it a few Times, and then recheck the...
You Prop an Engine so it run at or Near the Top of the WOT Range. If you chose a prop because you like a certain Speed at a certain Rpm, and the Engine isn't getting to the WOT Range, you will be Torturing that Engine. But, hey, it is your Engine to wreck, and your Money to repair/replace it
I too learned to ski behind a 2 Stroke 40hp, even did some deep water starts on a Slalom Ski behind it. I too have also noticed that with the 4 Strokes, 150hp on a 15 ft boat, can barely pull a skier on 2 skis.
A couple of Days ago, it was about 32-33(90-93F) and I put my phone on the Dash, 40 minutes later it was too hot to hold. I, for the first time ever saw the Red Thermometer on the screen. I took it out of the OtterBox, and held it against the AC outlet. Several minutes later It was working...
Don't be so certain that is any different on the water, Morons are Texting while Steering the Boat, and often have NO Clue regarding Right of Way
I think you will agree that Weekends have better Entertainment at the Launch though
Back in 2013, I made a Ring Tone from a Song on Family Guy "Bag of Weed" Weed wasn't Legal yet, and it did turn Heads. Since 2017, weed is Legal, and everywhere, so the Shock Value is gone, but the Tune is Catchy so I still have it as the Ring Tone
Out of the Water, one or two dead Cylinders and the Engine will appear to run okay, but once there is Back Pressure, from the Water blocking the Exhaust, that will change.
All the Cylinders are fed from a common Carb, so unless there is a Leak where the Manifold meets the Head, I would focus on...
I used to use Lacquer Thinner for Cleaning Carbs, it removed Dirt/Gum/Varnish and if they were left on the Carb, Plastic Parts. SeaFoam is mostly Oil and Naphtha. I have found just about anything, including Pine-Sol to be a better Cleaner. Oil in a Carb, well the Carb gets lots of Oil, as it in...
