I just purchased a new to me 2006 Optimax 250xs. Serial number 1E001830. Mechanic told me to run only premium but I thought the 06 could run on 87. Is there a big loss on power if I run 87 or do I risk damaging the motor running 87. Motor has 360 hrs and air pump was replaced with newer style last year. Anything I should look at for with this motor? Is best rpm to prop around 5900 rpms?
Thanks in advance
Tom
does need 91/ 5900,mis read for pxs which uses lower grade fuels
Last edited by JOE54; 07-17-2019 at 07:06 AM.
.................................................. ...the scariest thing in life is the unknown ...................................
Change your reed valves .I know by experience.
Why change the reed valves?Originally Posted by Outdoorsman04
2006 Triton TR-21 XD, Mercury 225 Pro XS, S/N 1B287870
Do they fail?
The XS, a Mercury Racing engine, didn't get carbon fiber reeds like the ProXS?
_______
Phil
'09 Hewescraft ProV
'09 150 Optimax
Yes I believe this engine does have carbon fiber reed valves. With almost 400 hours hours on them I would thinh they are very close to failing. Mine failed at around 350 hours. Your supposedd to check them every 100 hours because of my ignorance cost me a powerhead.
Reeds should be inspected. It's very rare to see failures on the Factory CF Reeds, they were a VERY high-quality reed. Enough so that the TDR we helped design is essentally identical to the OEM (just less expensive).
By the serial number- this is an 91 octane engine (Mercury doesn't use years, but this one was in the 2005 Production RANGE).
I would, however, verify the block COLOR, and the PCM Sticker information, as something MAY have been changed after it left the factory.
Dual Mercury Master Technician- for Mercury Outboards, Mercruiser and Mercury Racing at European Marine in Greenville, SC.
Still consider myself a "Marine Apprentice" after 47 years (learn something new every day).
Mercury Parts, Mercury Outboards, Smartcraft & Accessories, Injector Service, TDR Reeds- BBC Sponsor
It has the 14 pin connector. I read somewhere that this was only in the 2006 motors. But not sure if that was true.
Tom
With Racing... I would not necessarily rely on that.
Dual Mercury Master Technician- for Mercury Outboards, Mercruiser and Mercury Racing at European Marine in Greenville, SC.
Still consider myself a "Marine Apprentice" after 47 years (learn something new every day).
Mercury Parts, Mercury Outboards, Smartcraft & Accessories, Injector Service, TDR Reeds- BBC Sponsor
Reply With Quote
