Re: [Amel Yacht Owners] Repower


hanspeter baettig
 

Alexandre
You are right but why only 2200 on ful max Speed i go with 2800 and flat water with 8.4 kn with Perkins 80hp
Every wake will change the Speed 
Look in the Forum Bill from Bebe explain all the importence things
Fair winds hanspeter
Tamango 2 SM16 Göcek , Turkey


Von meinem iPhone gesendet

Am 26.06.2015 um 02:14 schrieb "Alexandre Uster von Baar uster@... [amelyachtowners]" <amelyachtowners@...>:

 

Hallo Hanspeter,

I have only own my SM2K since 2012, so my experience is limited.

I have the Volvo TMD 22 P (same as Perkins M80T) which is rated for 78HP at 4500 RPM

Until 2 months ago, I was only able to reach 2100 to 2200 rpm (which gives 50 HP).
If you are not familiar with SM not able to reach high RPM, search post on possible oversize propeller for the SM (at least for the ones with the Volvo).

Earlier this year I had the propeller rebuild, I can reach 2500 rpm (which is 56 HP).
Note that the maximum torque is at 2500 rpm.

Mostly I motor at 1600 rpm, which gives me 5 knots, and use less than 3.5 liter (less than 1 gallon) per hour.
Sometime I motor at 1800 rpm and I (think I) obtain 7 knots.
Every 10 hours, I increase the throttle to its max 2500 rpm then reduce to 2400 rpm for a few minutes to clean exhaust/turbo.
Personally I wish (for a sailing vessel) it was normally aspirated, as I had the turbo rebuilt in 2012 then changed in 2015.

If you want, I can post the TMD22P data.

Sincerely, Alexandre
SM2K #289 NIKIMAT
Grand Bahama, Bahamas.

--------------------------------------------
On Thu, 6/25/15, 'hanspeter.baettig@...' hanspeter.baettig@... [amelyachtowners] <amelyachtowners@...> wrote:

Subject: Re: [Amel Yacht Owners] Repower
To: "amelyachtowners@..." <amelyachtowners@...>
Date: Thursday, June 25, 2015, 5:44 PM


 









Question to all SM ownersWhats
the different between 80 hp and 110 hpMax Speed
for SM is ca 8.5 knIndependent how much power,
the power on the Prop is Important I have this
speed with clean  boat/Propeller with the Perkins 80 hp
Turbo (1990, 3000 h)HanspeterSM 16
Tamango 2Göcek, Tutkey

Von meinem iPhone gesendet
Am 25.06.2015 um 18:18 schrieb "Germain
Jean-Pierre jgermain@...
[amelyachtowners]" <amelyachtowners@...>:
















 






Wise choice Steve..
JPG


On
25 Jun 2015, at 17:00, flyboyscd@...
[amelyachtowners] <amelyachtowners@...>
wrote:
















 






Thanks for the info Chris. It looks like 80 hp is
the way to go on our older boats due to the Cdrive
issues.

Regards,
Steve and Liz
Aloha SM72



































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