Johnson 115 Initial Acceleration Problem

[dustyrector]

I have a Cajun 17.5' fish-n-ski with a 1992 johnson 115 V4 engine. I have had the boat for about a year and have taken it out 4 or 5 times. Since I got the boat, I have had problems with the boat's initial acceleration (before it planes out). It seems like the engine "bogs-down" initially. Then eventually, it will plane out. At WOT, it's around 5500rpm, and seems to run great once it planes out. After a previous posting, I removed the carbs and cleaned them thoroughly. They were pretty "gunked up". I put them back on and replaced the fuel filter, and the plugs. The engine seemed to run better for a short while, then went back to the acceleration problem. This really doesn't seem to be a prop issue, and now I don't think it's an issue of clean carbs. I'm open for suggestions and appreicate your comments.<br /><br />Thanks,<br />Dusty

 

[Yepblaze]

Re: Johnson 115 Initial Acceleration Problem

It may just be "the nature of the beast" if it has always exibited this behavior.<br /><br />Maybe it's just propped for speed.<br /><br />Perhaps if you could change the propeller so it brings the RPM's up some. <br /><br />But by doing so generally reduces the top speed.<br /><br />That is, if the motor is determined to be in tune and operating properly.<br /><br /> An important item to take into consideration before propeller tuning depends on what maximum RPM it is running at during full throttle operation.