I just bought this motor and it has a weird little issuse going on. When i first get to the lake for maybe the first couple of hours i don't have any problems with it. Then after that everytime you trim it down and try to push the hotfoot it stalls. After several attempts you can feather it enough to get it up on plane. After you get going no problem and it doesn't hesitate. But it will do it about everytime after you've run it for awhile.
Took it back to where i bought it and the guy says he couldn't find anything wrong with it, go figure. Something is wrong, it shouldn't be stalling. It also spits and coughs every now and then. Anyone out there have any suggestions,please i'am all ears.
Welcome to iboats. The syptoms you are describing are classic "heat soak". Seahorse5 explains it best, and this is what he wrote in a previous post.
"You are describing the classic symptoms of heat soak. When the motor is shut off, the residual engine heat increases under the motor cover to as high as 200°F according to factory tests. The gasoline in the carbs and vapor separator tank "boil" away as the motor sits and heat is transferred from the hot cylinder block to the carburetors and fuel system.
When you restart the motor, it is actually running on the heavy vapor fumes and not on liquid gasoline. As fresh gas is pumped into the motor, the temperatures of the carburetor bodies "flash off" some of the fuel, making more vapors until they cool down with air flow. The engine may idle, but will not develop any power on acceleration.
Squeeze the primer ball before starting and let the motor idle for several minutes before taking off. This allows the venturi effect of the carburetors to cool the float bowls and the intake manifolds to the point where they operate normally. Also the lower temperature gasoline from the fuel tank being pumped into the motor helps to cool things down.
The 60° engines, 90-175 hp, are more prone to heatsoak due to their compact design and the use of plastic manifolds and carburetors. They retain heat longer than the equivalent aluminum parts used in other engine models.
Alcohol and various fuel additives promote heat soak due to their lower boiling point. Winter blend fuels have more volatility to aid in cold weather starting and can also aggravate the problem. With the new 10% alcohol gasolines heat soak problems in all types of motors will increase, especially in hot weather.
You can minimize the problem by making sure your motor is in a good state of tune, using Champion QL78YC plugs gapped to .030", and adjusting the relationship between spark advance and throttle opening (sync & link) to occur at the exact same time, and perhaps richen up the idle screws by an additional 1/2 to 1 turn out. With these suggestions and letting the motor idle for a while after restarting, you should be in good shape."
Thanks. That makes sense,when it was a little cooler this year back in march i didn't have this problem. I also rarely let the motor idle very long before i take off. I'll give this a try and get back to you if thats it. Thanks again.
hey! did the fix work? I'm having similar problem, but i've got a 200hp Oceanrunner by Evinrude. I'm also losing pressure in the primer ball and I don't detect a leak anywhere. And what's weird is, once is does get going just fine, no problems! my biggest problems are running at idle after the boat has been running which is making slow trolling very difficult. Is it possible I have a problem with a check valve or a problem in the electronic primer system to the carbs?
hey! did the fix work? I'm having similar problem, but i've got a 200hp Oceanrunner by Evinrude. I'm also losing pressure in the primer ball and I don't detect a leak anywhere. And what's weird is, once is does get going just fine, no problems! my biggest problems are running at idle after the boat has been running which is making slow trolling very difficult. Is it possible I have a problem with a check valve or a problem in the electronic primer system to the carbs?
Thanks!
Sorry it took so long to respond. The answer is no it didn't work. I still have the same problem. If you've fixed yours please let me know how you fixed it.
Im also heat soaked, desprate and looking for a fix i have found a few things that may interst you.
1. eddy sent me an email saying - Yes, mine started with the rectifier going out, replaced it, then later, mine started to cough when the power pack was going out only when the motor was warm, but it was reccomended that since all the other ignition was replaced that a new stator be put on, runs great
2. ive heard people fixing it with deleting the vapor seprator, or replacing it.
95 175 evinrude intruder (stalling problem)
Re: 95 175 evinrude intruder (stalling problem)
Linear Mode
