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Yamaha Pro-V 175, carbed outboard....2-stroke. Simple stuff here. But, having an issue I can't seem to fix.
The motor starts and runs absolutely perfect. But, run it over ~3600 rpm's and it'll stutter, push it and it'll fall on it's face. Like it's running out of fuel.
It did this to me a few months ago, then the boat sat for weeks, and I ran it and it went away. Now it's back.
Recently, both in hopes of correcting the issue and also because it just needed to be done, I've completely re-wired the boat, including new crank battery (Odyssey PC1700), new 2 gauge engine wire (yamaha spec'd size), new fuel pickup, new A1 3/8 fuel line to the filter head, new SS filter head, new Yamaha 10 micron fuel filter, new primer bulb, new line from filter head to ender-cowl engine filter, cleaned engine filter, replaced both fuel pumps, and still nothing.
The boat starts and idles noticeably crisper since all the updates, but the top-end issue is still there.
Plugs have less than 15 hours on them.
Compression is dead-on and even between all 6 cylinders.
What the heck is going on here?? I'm stumped...
-T
The motor starts and runs absolutely perfect. But, run it over ~3600 rpm's and it'll stutter, push it and it'll fall on it's face. Like it's running out of fuel.
It did this to me a few months ago, then the boat sat for weeks, and I ran it and it went away. Now it's back.
Recently, both in hopes of correcting the issue and also because it just needed to be done, I've completely re-wired the boat, including new crank battery (Odyssey PC1700), new 2 gauge engine wire (yamaha spec'd size), new fuel pickup, new A1 3/8 fuel line to the filter head, new SS filter head, new Yamaha 10 micron fuel filter, new primer bulb, new line from filter head to ender-cowl engine filter, cleaned engine filter, replaced both fuel pumps, and still nothing.
The boat starts and idles noticeably crisper since all the updates, but the top-end issue is still there.
Plugs have less than 15 hours on them.
Compression is dead-on and even between all 6 cylinders.
What the heck is going on here?? I'm stumped...
-T