Issues with f225 yamaha

CMARSALA · Jan 10, 2008

I have an 03 F225 on my 2520xl with just under 500 hours on it. Up until this fall the motor was great and I would run 31-32 knots at WOT with 5800-6000 rpms. Now I can not get more that 5200 rpms out of the motor and my top end is only 25 kts (unless I trim the motor up until it begin to cavitate). Additionally, my fuel consumption has increased. I am far from a mechanic but I changed both fuel filters, ran all of the fuel out of the tank. added fuel treatment (ethanol and a stabilizer), checked to make sure all 6 cyclinders were firing. The engine starts no problem, idles perfectly and seems to run smooth - just not with the same power. Any ideas? Suggestions? Or recommendations for a good Yamaha mechanic in the Monmouth/Ocean County NJ area. Any assistance would be appreciated.

susqking · Jan 10, 2008

Do you keep your boat in the water, maybe you have some growth on the bottom?

bdgrbu · Jan 10, 2008

Did you check the travel on your throttle cable and adjustments at your throttle link?

CMARSALA · Jan 10, 2008

Regarding the growth on the bottom - I hauled the boat and power washed it just in case. The growth wasn't bad and it didn't seem to make a difference. I have not checked the adjustment on the throttle cables. I guess that is something I will have to consider. I am still in the water and using the boat. How difficult is the throttle cable adjustment?

gw204 · Jan 10, 2008

bdgrbu":2zuquryk said:
Did you check the travel on your throttle cable and adjustments at your throttle link?

Didn't Yamaha issue a recall or TSB about something to do with the throttle??

CMARSALA · Jan 10, 2008

I believe you are right regarding the recall. I had that part done by the Parker dealer several years ago. I believe that issue was causing the boat to stay in gear when it was pulled into nuetral

BuddahB · Feb 2, 2008

As mentioned, check the throw on the throttle cable to make sure your getting open all the way. Also, next tankful dump half a gallon of Marvel Mystery Oil in the fuel. If it's a fuel or carbon problem that will fix it CHEAP! 15 bucks a gallon at Pep Boys... I have an 03 f225 and use the stuff religiously. Never a problem... After initial treatment you can cut back to recommended amount...