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24Baja

06-18-2005 04:25 PM

correct RPMs

I just rebuilt my OMC 460 engine along with my 850 cfm holley carb. I am only maxing out at about 4000rpm. I should be hitting around 4800 rpms. Any idea where to start the problem solving? Is there a way to test to see if the secondaries in my carb are fully opening? does that sound like a possible cause?

Griff

06-18-2005 05:40 PM

Re: correct RPMs

Timing advancing correctly??????

FOUNTAINATLAST

06-19-2005 01:35 AM

Re: correct RPMs

We need more info, what rpm were you running before??? Are you using the same prop???? Make sure your throttle cable is adjusted correctly and opening up completely..... :rolleyes:

24Baja

06-19-2005 09:07 PM

Re: correct RPMs

I am using the same prop as before. Before the rebuild I hit around 4900 rpms

Poorsche

06-19-2005 11:54 PM

Re: correct RPMs

Are the throttle cables adjusted properly-otherwords are you really getting to WOT ? Went thru tha when I redid throtle levers and repowered--

cooltoys61

06-20-2005 06:02 AM

Re: correct RPMs

push the throttle all the way open then remove the spark arrest/filter and look in the carb,,are all the butterflies vertical? 'Cause that's open. Then check that timing is doing what it should at speed.

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