Wanting to replace the primer bulb on a 03 yamaha 225 hpdi (2-stroke) .
Planning on going back w/ yamaha brand but none of the ones i find list my motor.
Sooo my ? is does it matter which one as long as I get the correct size (5/16 or 3/8) ?

Thanks,Steven

I don't think it matters. A standard/universal bulb that fits you fuel line should work...just put it on right.

3/8"

Spend money on a good OEM bulb of a different brand, like evinrude or mercury. They work and last way longer then the cheap ones.

I echo what Alumacraft14 said. I bought a cheap one many years and one of the check valves failed almost immediately. I replaced it with a Merc one. Don't know if they use better materials or what, but I have heard this same story many times.

As long as you get the same size, your good.

https://www.simyamaha.com/Yamaha_Primer_Bulb_p/6aw-24360-01-00.htm

https://www.simyamaha.com/Yamaha_Primer_Bulb_p/6yk-24360-73-00.htm

thanks---- I was overthinking (as usual)
Steven