how to rev past 6200?

[zx14]

So what will it take to make my 2005 300x rev past 6200, it stops there with a 24" prop or my 31" lab.

[Dutch]

if it only turns a 24 the same rpm as a 31 something isnt right.

[zx14]

I heard the ecu flods the engine at 6200,,just BS?

[skydog]

Yea my 260 Drag would spin a 24 to 9,500

[Euroski]

could engine be reset to break in mode?

[CraigR]

I have the same problem. I am on my way to a rally and there is supposed to be a Mercury tech there so hopefully I can find out what is going on. I was told to unplug my MAP sensor and try running it but that wasn't the fix for it. Although it did feel like it got a little more power but still no more rpms. Keep in touch let me know if you find something out.

Thanks,
Craig

[Pro300x24LD]

mine appears stuck at about 6400-6500 rpm's, I have hit 6700 only once and have not been able to repeat.

I do only have 15 hrs on the pcm which did force me to "break in" the engine again when it was replace....do I have to wait a few more hours?

[skydog]

What is the Rev limit set at on theses motors?

[zx14]

I thought they where to spin 6800

[CraigR]

On ddt it says rev limiter is at 7000 rpms but tag on motor says 6800.

[CraigR]

zx14 did you find out anything on your motor.

[v8etr]

I am having the same issue 6200rpm reguardless of the prop. Have you guys figured it out??

[SPECTRE racing]

check your reed blocks,cylinder leakdown test?

[eli]

have you tried raising the motor ,maybe free it up a bit.

[v8etr]

Yes I have raised the motor but the rpm increase is only about 100-150rpms