[C36IA] prop pitch and engine problem

[Craig Illman]

Darin - Did you have an engine survey done? Sounds like you're not getting
enough fuel or have compression problems.

Craig

-----Original Message-----
From: c36list-bounces at c36ia.com [mailto:c36list-bounces at c36ia.com] On Behalf
Of Darin Duphorne
Sent: Wednesday, July 01, 2009 6:57 PM
To: c36list at c36ia.com
Subject: [C36IA] prop pitch and engine problem

I'm post-survey, but still pre-purchase of a 2000 C36MKII with a Max- 
Prop 3-blade feathering prop.  I've read enough of the forum posts to  
get an idea what rpm and hull speed I should be getting but it's  
really weird, and I can't tell what might be causing the issue other  
than prop pitch.

In the sea trial, I was only getting about 4.5kts under full power in  
flat lake conditions.  Free rpm was around 2850 and loaded rpm was  
about 2800 (50rpm droop -- not enough).

We asked seller to repitch to confirm, and he's been having a diver do  
it with no success.  Here are the things they've tried...

15x18	4.5kts	2800rpm
15x20	6.7kts	1800rpm
15x18	6.8kts	1900rpm
15x16	7.0kts	16-1700rpm (yikes!)

It's weird!  I can't imagine an engine related issue, or it wouldn't  
get to 2800rpm, I wouldn't think.  Compression problems when loaded?

Any ideas?
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