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ContinuousWave: Whaler Performance
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posted 10-08-2003 07:35 PM ET (US)
Hi fellow Whaler'ers!
I found the plate on my Johnny stating the range of which to run her at.
70 hp. 1984 Johnson -- Rebuilt 2 years ago
It simply stated that it should be ran from 4500-5500.RPM's
BIA at 5000RPM's (What the heck does that mean?/!)
And something else like PIS or something with a "P" in it at 5000 RPM's
posted 10-09-2003 11:01 AM ET (US)
4500-5500 is WOT(wide open throttle) range. In other words you should be between 4500 & 5500 when she is mashed to the console and obviously the linkage is allowing you full throttle. What size prop are you running Jazz? 4800 is on the low side. I would drop down 2" of pitch and get her up into the 5200 area. You should be running a 17" prop.
BIA is Boating Institue of America I believe and they rate your engine at 70hp @ 5000 rpms.
posted 10-09-2003 01:08 PM ET (US)
Ah'll talk in the john if propriety demands sociability, but usually Ah prefers t' keep mum and CONcentrate.
Nothin' woise than a gott-damm, slap-happy gabber runnin' on in the crapper:-!
posted 10-09-2003 06:16 PM ET (US)
I am running a 13.25 X 17" Pitch. Aluminum Job. I thought about stainless but its $$$$$$. My prop is about 2 years old. No nicks or dings in it. Just the paint is coming off of it.
Hoots, you crack me up!!!!!
posted 10-10-2003 11:27 AM ET (US)
She is either mounted too low, tired or waterlogged hull. You should be doing better than that and up in the 37+mph area.
posted 10-10-2003 08:48 PM ET (US)
JAZZ had the motor rebuilt two years ago. So I don't think the motor is tired.
posted 10-13-2003 10:40 AM ET (US)
Rebuilt is in the eye of the rebuilder.
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