Rodbolt Please you #1

[osvaborbon]

I have problem in my 1999 Yamaha ox66 225 the rpm old the time going up and down in low rpm dont duet this please help me I from Cuba

 

[rodbolt]

Re: Rodbolt Please you #1

most likly the VST filter.
however this engine also eats fuel pumps.
if you cant test the rail pressure then remove the seperator tank and clean the filter screen.
that tank can be removed without disconnecting the fuel lines.
use vasoline to aid in holding the VST oring in place during reassembly.
replace or rebuild the low pressure fuel pumps as well.
I know parts are rather difficult to procure in cuba.

 

[osvaborbon]

Re: Rodbolt Please you #1

where I find the VST

 

[cousinabe]

Re: Rodbolt Please you #1

http://www.boats.net/parts/search/Yamaha/Outboard/1999/S225TXRX/FUEL INJECTION PUMP/parts.html

vst filter #26

here are pics from a 4 stroke model
http://www.bogueinletnc.com/yamaha/8.html

 

[osvaborbon]

Re: Rodbolt Please you #1

I need to finding The VST in my motor 1999 Yamaha 225 TXRX and the regulator prechur thank you for you RODBOLT

 

[osvaborbon]

Re: Rodbolt Please you #1

Hello RODBOLT . How hard is it to convert a 1999 225hp hamaha TXRX to 250 HP or 300 HP. All the specs seem to be the same for each motor if this is possible.Is the change worth the 25 extra HP.

 

[rodbolt]

Re: Rodbolt Please you #1

300 isnt an option.
look up the part numbers for the ECU,muffler tube and injectors as well as the crank cylinder block.

 

[osvaborbon]

Re: Rodbolt Please you #1

Thank you RODBOLT: