Bought a BRAND NEW 8hp Yamaha Enduro last spring. The shop ran it and gave it to me. I stored it on the boat
for 8 months before running it.
Iím following the breakin schedule and have about 7 hours on the engine
. Schedule requires 25:1 for the first 10 hours then 100:1.
runs on 1 cylinder at low speed but #2 kicks in with some throttle and then is pretty reliable as it heats up.
I had an older (2006) non-enduro Yamaha onnthis exact same boat
(12í Porte boat) last year and it ran great. It would push my wife and I up on plane at 3/4 throttle and hold us ther st 1/2 throttle. This one will get me alone on plane (barely) but will not plane with both of us. BIG DIFFERENCE. This engine is a DOG.
Came with a 7x9 prop, I changed to a 8-1/4x8 prop, no big difference.
I changed plugs. No big difference.
Yesterday I cleaned the carb. No sign of varnish
, no difference.
No taking it back to where I bought it, many miles ago. Tried to get it to a Yamaha mechanic
here in Georgetown
, but heís been sick for a week. Now we are leaving to head
South. It works, but poorly.
Can it be the 25:1 oil
mix ratio? Will this clear up when I go to 100:1?
Any other thoughts?