Thread isn’t that old, but I bought my Yamaha 4 HP, 4 stroke winter
of 2004 at the boat
Show along with an Avon dinghy
., after I bought my new H356 in March of 2003, commissioned in May 2003. It was a great engine for several years, then the gas went south when gas regulations
screwed it up. We took our boat to Florida
on a six month cruise
from Kentucky Lake in 2013-14. I had it serviced two weeks before I left. Worked at mile 76 on the Tenn-Tom the. A week later at Big Lagoon
while anchored there, wouldn’t run. Got the carburetor cleaned with Ultrsound by established dealer in in Panama
City. He’s the one that alerted me to,the gas issue. He said it was the gas. Put fresh gas in, fresh gas in 2 gallon tank and crossed the gulf, 1 week later at Gulfport Marina on GICW, wouldn’t startAfter that I had carbs cleaned, replaced twice - once went less than a month while cruising. Nothing worse than a dinghy motor
that won’t run when you are cruising. The jets are small as hairs. Used non- ethanol gas - still wouldn’t run. Got to Punta Gorda, went to large Yamaha Dealer in Port Charlotte and put new carb on, then took it and left on consignment where I bought a 5hp Lehr propane and after a few initial tuning problems, started every time. No comparison in the reliability
Consigned had it two weeks, guy walked In to buy it and it would ‘t start - lost
. Put a new fuel pump
on it never sold
it. Left in Fla and saved hundreds since.
I wish you luck if you buy one, but I had nothing but bad luck with mine. The jets are too small as the gas crystallizes in the jets. You can run it til it quits - which I did every time - still has enough residual to crystallize. The larger over 8 hp Yamahas have larger carb jets and don’t have as much of a problem, but all the small 4 strokes do.