|
|
Posts: 73
| Boat started having problems on a trip I had last month. It's an 04 on a 185 G3. The motor has less than 70 hours on it. If The throttle is put all the way down it was going up to normal RPMs. If the throttle is left down the boat will lose RPMs as well as speed. If you ease off the throttle for a second and then push it back down, the RPMs momentarily go back to the higher RPMs and then decrease just the same.
Had the boat in for just over three weeks now. They say it's dropping a cylinder but they're not sure why. No codes are coming up. They've replaced gas filter, spark plugs, cleaned out the VST and pre filter, and fuel injector and nothing is seeming to work. They also tried a different prop since the prop that came on the boat was not correct. They have no idea what is causing this.
|
|
| |
|
Posts: 163
Location: lake st clair michigan | i had a similar issue with a merc no codes and very intermittent finally they caught it only after it got more consistant ...ended up being throttle position sensor ...only took 2 seasons to find it ... |
|
| |
|
| my friend is having the same issue right now with his yammie . it started with a small sputter while salmon fishing then it got progressively worse. he is getting some help from yamaha. but have yet to get it figured out |
|
| |
|
Posts: 25
| What is your wot rpm and what does it drop down too when the problem starts. Also is it a miss or just slowly drops rpm |
|
| |
|
Posts: 25
| Also did they run the motor on a remote fuel tank |
|
| |
|
Posts: 73
| I am not sure if they ran it on a remote tank. WOT is around 5800. It drops to around 5000 initially and then slowly drops from there |
|
| |
|
Posts: 25
| Try a remote tank, thats more than one cylinder to keep dropping rpm fuel pressure is my thought a test you can perform is to hook up a timming light to number one cyl and as it happens see if you are loosing spark, repeat on all cyl too make sure it is not a spark issue
|
|
| |
Yamaha 150 four stroke not hitting/losing RPM and speed