mikesull415 |
03-23-2012 05:47 PM |
Need some help with the Tach
Not sure if this is the best place for this question, but I just got my boat re prop'd and ready for summer. It's a 93 MX19 with the 4.3 merc and alpha 1. Last year she was great, but the prop was pretty rough and there was a lot of vibration at lower rpms. Anyway, it had a 19p three blade aluminum on it and WOT was 4800 - 5000. Put a 19p stainless three blade on it, and now according to the tach it's hitting upwards of 5800. So we changed it out with a 21p but it's still hitting 5200 to 5300. Honestly I think my tachometer is reading off, so that's my main question....how can I go about getting an accurate reading on the RPM's to test it against?
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