Sounds like it might be bow-heavy to me. Can you shift weight aft?
Also, try adding a Doelfin stabilizer to the cavitation plate - it's one of
those hydrofoil fins that bolts to the cavitation plate of an outboard -
I've had it work miracles on other small boats, and should allow you to
plane at a lower speed. Costs about $35.
This is not proper cat behavior.
Bob Deering
Juneau Alaska
-----Original Message-----
From: power-catamaran-bounces@lists.samurai.com
[mailto:power-catamaran-bounces@lists.samurai.com] On Behalf Of david walker
Sent: Thursday, May 24, 2007 8:01 AM
To: power-catamaran@lists.samurai.com
Subject: [PCW] 20' cat
I just bought a new 20' single engine (150 e-tec) tunnel-hull catamaran and
have had nothing but surprises. I will not mention the name hoping I get
some resolution of the problems. This is my first catamaran. The main
problem I've run into is as follows:
1) at any rpm under 3000 I have to fight the helm to keep on track. The
only way to relieve this fight is to trim the bow all the way up. At this
trim she is cavitating
so badly that when she does grab she goes from 10knts to 40 in a
blink throwing all passengers all lover the boat. When on plane, in calm or
rough water, she
handles well. I have worked with this cat for hours at low speeds,
calm waters and differing trim settings with no solution.
Is this normal for catamarans? Please help!
david walker
dwalker434@earthlink.net
Power-Catamaran Mailing List
Sounds like it might be bow-heavy to me. Can you shift weight aft?
Also, try adding a Doelfin stabilizer to the cavitation plate - it's one of
those hydrofoil fins that bolts to the cavitation plate of an outboard -
I've had it work miracles on other small boats, and should allow you to
plane at a lower speed. Costs about $35.
This is not proper cat behavior.
Bob Deering
Juneau Alaska
-----Original Message-----
From: power-catamaran-bounces@lists.samurai.com
[mailto:power-catamaran-bounces@lists.samurai.com] On Behalf Of david walker
Sent: Thursday, May 24, 2007 8:01 AM
To: power-catamaran@lists.samurai.com
Subject: [PCW] 20' cat
I just bought a new 20' single engine (150 e-tec) tunnel-hull catamaran and
have had nothing but surprises. I will not mention the name hoping I get
some resolution of the problems. This is my first catamaran. The main
problem I've run into is as follows:
1) at any rpm under 3000 I have to fight the helm to keep on track. The
only way to relieve this fight is to trim the bow all the way up. At this
trim she is cavitating
so badly that when she does grab she goes from 10knts to 40 in a
blink throwing all passengers all lover the boat. When on plane, in calm or
rough water, she
handles well. I have worked with this cat for hours at low speeds,
calm waters and differing trim settings with no solution.
Is this normal for catamarans? Please help!
david walker
dwalker434@earthlink.net
_______________________________________________
Power-Catamaran Mailing List
