Thread: Yamaha precision blend

What years where these engines made?
I'm looking at one, 25hp, 2 carbs.
All I can read on the sticker is 25elr, I think. The sticker doesn't appear to be manipulated, just hard to read, faded.
Owner says it is a 2002. I'm having problems verifying that. It's not a deal breaker, as long as it runs and compression test ok.
Is their somewhere else on the engine to verify?
I've looked on iboats and boats.net, not finding anything to match up.

Thanks

I'll just quote what was told to me on another forum bc I'm far from a mechanic.

"Why bypass the reservoir?

2 reasons. Evinrude had oil injection and it was an absolute joke, failure prone pile of steaming feces. Got everyone scared. So now everyone wants to remove it. The Yamaha system is not known to fail but people still remove it all for some ignorant reason. Stressing the "ignorant" part (read again: it is not known to fail). The other reason is sometimes the duck hunters....aka boat racers...will take it off because it adds weight, the lighter the motor supposedly the faster it goes.

The older oil injected Yamaha 25's (like yours) were a sweet running engine. Somewhere in the late 1990's they went back to premix only, and the idle quality would suffer-mostly because owners would mix the fuel at 50:1 instead of 100:1, again, because they were scared that 100:1 wasn't enough oil. But they failed to realize that the oil injected version was basically about 250:1 at idle speed and around 100:1 at full throttle. Anyway, the early injected engines were Very smooth idle for a 2 stroke, VERY smooth, all the way down to 700 RPM low idle speed. They were jetted accordingly. Then people remove the oiler and forget to re-jet the carbs, or at the very least adjust the idle mixture a little. Usually have to richen them up a hair.

When doing a carb cleaning on these, I find it proper to re-adjust the linkages after reinstalling the carbs. Synchronizing the carbs, adjusting the pick up timing as well. Makes for a much nicer running engine than just slapping the carbs back on and forgetting about it."


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