bluechevyy
Seaman
- Joined
- Oct 23, 2009
- Messages
- 50
Please anyone that can help! I have a 2005 Mercury 4 stroke optimax (which I am told the power head is a Yamaha). 200hrs on the engine is all.
I am experiencing a major power loss at full throttle. One day it ran great, the next it runs at ~3000rpms max throttle. You can feel it stutter as it's accelerating to the 3000rpms. Also, it starts awesome and ides pretty good. You can feel a little more vibration than you use to at idle.
Here is what I have done so far. I have replace the spark plugs, check the oil level etc. Made sure all electrical connections are plugged in all the way in the engine. I checked spark with an inline checker and also at the output of the plug and all looked good to me. I changed out water separator filter and internal filter. Found nothing. Gas is not old or water contaminated. Also I took it out and separated my fuel system all together by hooking up an external tank and the problem was exactly the same.
Here's where the frustration comes in. I took it in to a local marine dealer and they put it on their so called diagnostics tool and it told them the crank shaft position sensor was bad. So, 3 and a half weeks later I get the boat back with a bill for just short of $700. Still does the same thing. I took it to another marine dealer and they did "extensive diagnostics" and determined it was the #2 & 3 ignition coal. They replaced the part and a week later and $590 later it still does the same thing. I'm into a fix almost $1300 and I have no faith that they know what's wrong. Please help.
Now it's back to the 2nd marine dealer for the total of the 3rd visist and they pulled the injectors to clean the screens. Of course they don't have the orings to put them back! Another week of waiting parts. The guy said he wasn't convinced the injectors were the problem either. HELP HELP please. I truely love my boat and going out on it on a regular basis,but, I'm starting to think I stepped in to deep on this one. Who would expect a motor only 4 yrs old to have this costly of problems. I don't neglect maintinance on it either. I run fuel saver change oil regularily etc.
I'm trying to get my 5, 3, and 2 yr old girls out to fish before winter sets in.
Thanks in advance for any ideas!!!!
Curt (out of Portland, OR)
I am experiencing a major power loss at full throttle. One day it ran great, the next it runs at ~3000rpms max throttle. You can feel it stutter as it's accelerating to the 3000rpms. Also, it starts awesome and ides pretty good. You can feel a little more vibration than you use to at idle.
Here is what I have done so far. I have replace the spark plugs, check the oil level etc. Made sure all electrical connections are plugged in all the way in the engine. I checked spark with an inline checker and also at the output of the plug and all looked good to me. I changed out water separator filter and internal filter. Found nothing. Gas is not old or water contaminated. Also I took it out and separated my fuel system all together by hooking up an external tank and the problem was exactly the same.
Here's where the frustration comes in. I took it in to a local marine dealer and they put it on their so called diagnostics tool and it told them the crank shaft position sensor was bad. So, 3 and a half weeks later I get the boat back with a bill for just short of $700. Still does the same thing. I took it to another marine dealer and they did "extensive diagnostics" and determined it was the #2 & 3 ignition coal. They replaced the part and a week later and $590 later it still does the same thing. I'm into a fix almost $1300 and I have no faith that they know what's wrong. Please help.
Now it's back to the 2nd marine dealer for the total of the 3rd visist and they pulled the injectors to clean the screens. Of course they don't have the orings to put them back! Another week of waiting parts. The guy said he wasn't convinced the injectors were the problem either. HELP HELP please. I truely love my boat and going out on it on a regular basis,but, I'm starting to think I stepped in to deep on this one. Who would expect a motor only 4 yrs old to have this costly of problems. I don't neglect maintinance on it either. I run fuel saver change oil regularily etc.
I'm trying to get my 5, 3, and 2 yr old girls out to fish before winter sets in.
Thanks in advance for any ideas!!!!
Curt (out of Portland, OR)