Take a picture. Make sure there a little blood letting Pray to the outboard gods you can get it back in the same way. and the job will go smoothly. This is from a 20+ yr Yamaha tech with 10+ as master
Well that’s more than last time I did one. It has been a while I guess. I don’t do retail and Even my cost now 650. Retail on carb still cheaper than new 20hp. New 20 is just detuned 25. So that weight as well as cost. There’s value in the job but in specific applications.
Only aftermarket parts I will ever install is a trim motor or starter. Everything else genuine Yamaha. This model just carb. 33% increase for under $500 not to bad.
block, cyl head, cid all same. The carb is the only part that affects power that is different. The Venturi sizes are noticeably different sizes. I have converted a few of these over the years
to do this correctly will be many$$$$ in parts need command link network with interface module as well as NMEA 2k network all to get very minimal information. Hummingbirds NMEA2k capabilities are laughable at best. No where same information will show as does on garmin or lowrance unit