2002 150hp dies on throttle up and idle rough

[Windstorm]

Originally Posted by vantrow

Not sure if this helps, but I found out that Johnson recalled their mechanical fuel pump. They told my mech. to replace it with an electric fuel pump and that this was the only solution. Mainly because of recall, and obsolete parts. This is after carb cleaning, throttle body replacement, fuel pump diaphram replacement. Soooo. took some time and money, but im now back to smooth sailing. See previous reply for my original problem.

Thanks and Good Luck!

What year motor is yours and what year fuel pumps were recalled?

Thanks

[Windstorm]

OK Summer is almpost over and the boat is still not fixed. Mechanic has no new ideas.

I bought this boat off of what I'd have to say was a very dishonest owner.

The following has been changed, or isolated to not be the cause. First ran with alternative fule tank to isolate not bad gas, changed power pack, changed VRO oil pump, changed Stators, Mechanic tells me he has had the carbs all off, as I suggested to look for gasket leaks. He found the old stators to be burnt. However aftetr all of this still no fix.
Boat runs great going out, lots of power, no issues. turn off. REstart after about 5 minutes, breaks up surges at idle and no ability to clear out or run hard with throotle added. At best you get some bursts of acceleration, more ofthen just breaks up and sputters. Can hobble back to port at 3 mph.

I've seen others with claimed similar problems, but no posted solutions.

Please help!
So far

[fishcrazy]

Well I guess since I started this post I should thank all of you for your input. I have not solved my problem yet but it seems to be somewhaqt better. I have replaced the fuel lines from the tank to the motor and while I was at it installed a fuel filter/water separator. I read so much about E10 fuel that I thought it was good precaution even if it didnt solve the problem. I thought it was a fix when I put in and it ran great and idled great as well but I didnt run it long and found out later I still had the problem. Although it isnt as bad it is still idleing rough at times and wants to stall when I throttle up. So I have read a lot of other peoples input into this seemingly unsolvable issue and have almost come to the conclusion that these motors are just not going to idle smooth. One solution to the problem is that arter these motors warm up and run for a while and are shut down the heat is excessive under the hood and causes the gas in the bowl to boil and become vaporised and when you try to start up you are trying to run on a mixture that is not corect due to this vaporized fuel condition. The fix is said to be just increase your idle speed with the throttle while in neutral for a minute to wash the temps down and return the bowl temp to normal and then throttle up after that and it shoould run fine. I have not tried that yet. Others say that they have adjusted the low speed idle jet and fixed it. I have not tried that yet either. Ov coarse many said to rebuild the carbs and many said that they did and that dint fix it. I also seemed to have the issue of stalling out when I tried to throttle up. I found this and have made the adjustment but have not checked it in the water yet. Here is the link:

BBC Boards: Throttle roller timing arm adjustment 60* motors

I hope tha at least helps me take off out of the hole better. I think I will get it in the water this weekend and I intend to try to adjust the low idle jets if it acts up as I suspect it will. I'll let you know if it works. any of you have any sucess.