tcpip95
Well-Known Member
I've been struggling with a performance problem for quite some time now. Actually it goes back nearly 3 years ago when I replaced the dual ellipticals with the Sport Performance Package. The main problem was that I saw a drop in RPMs. At first it was a gradual drop, then it slowly got worse and worse. I attributed it to the increase in weight from switching the ellipticals out.
Finally, it got to the point where I couldn't get past 5,200 RPM. Thinking it was motor height related, I started moving the motor to the various holes. Tried hole 1, then hole 2, then hole 3. No changes. Then tried different props: 14" x 13P, 13.5" x 15P 4-blad, 14.5" x 15P. No changes.
Had my dealer run a diagnostic check on my motor - no diagnostic error codes returned.
Finally I start digging on the Internet and learn that I should check my fuel injectors. I've religiously serviced the boat at 100 hour intervals; fuel filter, fuel/water separator filter, check for water and contaminants in the fuel. When I hit the 500 hour mark on the engine I had them change the water pump impeller as well as all other 500 hour services. In going back over my maintenance records, I discovered that my fuel injectors have never been cleaned or serviced - in 4 years!
I found a guy down in Naples that services fuel injectors. He has a YouTube video that shows how to remove them (extremely simple). I pulled the 4 injectors (Yamaha F150 4-stroke) and drove down to Naples. I got them back the next day. He told me they were severely clogged, and out of calibration. He told me that there is a VST Filter on Yamahas that needs to be cleaned as well. It is a hard-to-get-at filter, which requires removing the intake manifolds and some other hardware. He said that if I didn't clean that, the injectors would get clogged sgain. He told me that it wasn't a difficult task (removing some bolts and hoses) but that it was time consuming and that the dealer would charge about $700 all told.
Long story short, I performed the VST filter service, replaced the fuel filter and the fuel/water separator filter and took it out for a test. I have the stock Yamaha Reliance Pro 14.5" x 15P prop on it. Hit 5,950 RPM at WOT. Don't have GPS numbers as I'm right in the middle of swapping out my GPS.
So lessons learned:
1. Service your fuel injectors yearly. Cost: $18 per injector
2. Service your VST filter yearly. It's a PITA to get to, but it's gotta be done. Here's the procedure: http://www.thehulltruth.com/sim-yamaha-verado-club-parts/222603-f150-vst-filter-replacement.html#b
Finally, it got to the point where I couldn't get past 5,200 RPM. Thinking it was motor height related, I started moving the motor to the various holes. Tried hole 1, then hole 2, then hole 3. No changes. Then tried different props: 14" x 13P, 13.5" x 15P 4-blad, 14.5" x 15P. No changes.
Had my dealer run a diagnostic check on my motor - no diagnostic error codes returned.
Finally I start digging on the Internet and learn that I should check my fuel injectors. I've religiously serviced the boat at 100 hour intervals; fuel filter, fuel/water separator filter, check for water and contaminants in the fuel. When I hit the 500 hour mark on the engine I had them change the water pump impeller as well as all other 500 hour services. In going back over my maintenance records, I discovered that my fuel injectors have never been cleaned or serviced - in 4 years!
I found a guy down in Naples that services fuel injectors. He has a YouTube video that shows how to remove them (extremely simple). I pulled the 4 injectors (Yamaha F150 4-stroke) and drove down to Naples. I got them back the next day. He told me they were severely clogged, and out of calibration. He told me that there is a VST Filter on Yamahas that needs to be cleaned as well. It is a hard-to-get-at filter, which requires removing the intake manifolds and some other hardware. He said that if I didn't clean that, the injectors would get clogged sgain. He told me that it wasn't a difficult task (removing some bolts and hoses) but that it was time consuming and that the dealer would charge about $700 all told.
Long story short, I performed the VST filter service, replaced the fuel filter and the fuel/water separator filter and took it out for a test. I have the stock Yamaha Reliance Pro 14.5" x 15P prop on it. Hit 5,950 RPM at WOT. Don't have GPS numbers as I'm right in the middle of swapping out my GPS.
So lessons learned:
1. Service your fuel injectors yearly. Cost: $18 per injector
2. Service your VST filter yearly. It's a PITA to get to, but it's gotta be done. Here's the procedure: http://www.thehulltruth.com/sim-yamaha-verado-club-parts/222603-f150-vst-filter-replacement.html#b
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