Sharki shaft alternator
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marklesparkle59
This is the set up on Sharki #96 Sea Hobo. I can't detect any charge at all, but it is very smooth. Mark Sent from my Samsung device 
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Ian Park
Mark
On my Santorin you have to put the key in and switch on (next to your ameter). The green light comes on. It sends a current to the alternator to excite it and start it charging. You should turn off when finished using it and put your gear lever in reverse to stop the alternator charging before switching on the engine. I believe the diodes in each of the engine and alternator should prevent any ‘issues’, but that is the prescribed Amel method. My knowledge of electrics is limited - someone with a better understanding may chip in here. The Santorin prop shaft pulley is quite a bit bigger too, so will turn the alternator faster. There is a significant drop in prop shaft speed as soon as you turn the alternator on. Ian |
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marklesparkle59
Thanks Ian. I am struggling to get to grips with the electrical system. The engine/starboard alternator is charging but not sure about the domestic/port alternator and I dont really understand the data my shiney new clamp meter is giving me. I need to read a book I think. Mark Sent from my Samsung device -------- Original message -------- From: Ian <parkianj@...> Date: 08/03/2019 11:52 (GMT+00:00) To: main@amelyachtowners.groups.io Subject: Re: [AmelYachtOwners] Sharki shaft alternator Mark On my Santorin you have to put the key in and switch on (next to your ameter). The green light comes on. It sends a current to the alternator to excite it and start it charging. You should turn off when finished using it and put your gear lever in reverse to stop the alternator charging before switching on the engine. I believe the diodes in each of the engine and alternator should prevent any ‘issues’, but that is the prescribed Amel method. My knowledge of electrics is limited - someone with a better understanding may chip in here. The Santorin prop shaft pulley is quite a bit bigger too, so will turn the alternator faster. There is a significant drop in prop shaft speed as soon as you turn the alternator on. Ian |
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amel46met
Hello
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Does anyone in the group use a Max Prop with the shaft alternator I have read that it does work any tricks?
Tom Deasy
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Olivier Beaute
Hello Tom, the prop shaft alternator can work with a MAXPROP. It is a bit tricky, but you should try this: -while sailing (above 4 knots), start the engine and engage reverse idling -while your engine is reversing, turn ON the key switch of your alternator -then set the engine to neutral and stop it Your MAXPROP should keep the reverse position unless: a) your batteries are charged enough and the alternator will not oppose much power to the prop, therefore the prop will spin faster and will finally open and the shaft will stop b) your boat speed is high (while surfing) and the prop will spin faster and will open Good luck. Olivier
On Friday, March 8, 2019, 7:24:20 PM GMT+1, amel46met <onboardaphrodite@...> wrote:
Hello
Does anyone in the group use a Max Prop with the shaft alternator I have read that it does work any tricks?
Tom Deasy
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Warren Traill <trailz@...>
Interesting information Olivier. I have another question. My propeller is fixed. And I have no shaft a;ternator. When I am sailing the shaft continues to rotate. Is it good practise to engage reverse to stop the shaft rotating if I wish. Or is there some potential for damage? Thanks, Warren Manon2 Sharki #15
From: main@AmelYachtOwners.groups.io [mailto:main@AmelYachtOwners.groups.io] On Behalf Of Beaute Olivier via Groups.Io
Sent: Sunday, 10 March 2019 10:51 PM To: main@AmelYachtOwners.groups.io Subject: Re: [AmelYachtOwners] Sharki shaft alternator
Hello Tom,
the prop shaft alternator can work with a MAXPROP. It is a bit tricky, but you should try this: -while sailing (above 4 knots), start the engine and engage reverse idling -while your engine is reversing, turn ON the key switch of your alternator -then set the engine to neutral and stop it Your MAXPROP should keep the reverse position unless: a) your batteries are charged enough and the alternator will not oppose much power to the prop, therefore the prop will spin faster and will finally open and the shaft will stop b) your boat speed is high (while surfing) and the prop will spin faster and will open
Good luck.
Olivier
On Friday, March 8, 2019, 7:24:20 PM GMT+1, amel46met <onboardaphrodite@...> wrote:
Hello Does anyone in the group use a Max Prop with the shaft alternator I have read that it does work any tricks? Tom Deasy Maramu 125
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amel46met
Hi Olivier
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Thanks for the information
Will give it a try with this good Caribbean wind
Tom Deasy
S/Y Aphrodite
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smiles bernard
Interesting thread !
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I have been using the shaft alternator lots over the last 8 months. My Hurth gearbox manual seems to suggest that it should be left to idle (regardless of the Amel propshaft alternator) but I assume this is very gearbox specific. So I run my gearbox in neutral even without the alternator ‘on’ Does anyone known if idle in reverse or idle with the gearbox lever fwd makes a difference? Or is idle just idle - if you don’t have a MaxProp that is? When coming out of idle I try and slow the boat down 1st to reduce gearbox forces as it moves into gear. All the best Miles Maramu 162 On 10 Mar 2019, at 21:39, amel46met <onboardaphrodite@...> wrote:
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Ian Park
Miles
The Santorin has a Hurth gearbox. The instruction by the gear shift says not to put into forward gear whilst sailing. Must be a reason. Ian |
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Danny and Yvonne SIMMS
Hi. The reason being that it locks in reverse but in forward the clutch plates are lightly engaged and the propeller turns slowly causing wear to the plates. Try it with the engine cover up when sailing with the shift in neutral and the prop will be spinning. Engage forward and it will slow, engage reverse and there is a satisfying clunk and it stops. However mine for some reason not known sometimes stops in reverse, sometimes in forward so I always check for that satisfying clunk. Regards Danny SM 299 Ocean Pearl On 12 March 2019 at 07:18 Ian <parkianj@...> wrote: |
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Danny,
The opposite is true on Cream Puff. There is a French sticker by the throttle that says to put the gear in forward when sailing and leave it there. We do not have a shaft break or alternator. We also start the engine (when the boat is moving forward) with it in gear per the sign. This seemed odd to me but Miles from Lady Bug has the same sticker and speaks fluent French.
We are fitted with an AutoProp and for some reason this makes a difference (and of cause the engine on Amel faces the wrong way – not sure if this also effects it). We are unable to stop the rotation of the shaft in reverse. It will still slowly turn. We hear the reassuring clunk in forward and the shaft will not move. I really do not know all the mechanics involved but just follow the sign.
This all obviously varies by vessel, engine, prop etc.
With best regards,
Mark
Skipper Sailing Vessel - Cream Puff www.creampuff.us
From:
main@AmelYachtOwners.groups.io [mailto:main@AmelYachtOwners.groups.io] On
Behalf Of Danny and Yvonne SIMMS
Hi. The reason being that it locks in reverse but in forward the clutch plates are lightly engaged and the propeller turns slowly causing wear to the plates. Try it with the engine cover up when sailing with the shift in neutral and the prop will be spinning. Engage forward and it will slow, engage reverse and there is a satisfying clunk and it stops. However mine for some reason not known sometimes stops in reverse, sometimes in forward so I always check for that satisfying clunk. Regards Danny SM 299 Ocean Pearl
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Danny and Yvonne SIMMS
Hi Mark, the important thing is the clunk. My sign says no to forward, but as I said in my previous just to be contrary sometimes its clunk in forward, sometimes reverse. I don't think it has anything to do wit the prop. I have auto prop So I just go with the clunk. Regards Danny On 12 March 2019 at 07:58 Mark Erdos <mcerdos@...> wrote:
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Olivier Beaute
Hello Warrren, on a Sharki with fixed prop, while sailing, you should stop the propeller by engaging reverse. This will reduce noise and packing stuff wear. There will be a "clunk" which could surprise you but don't worry, the clutch shock when you engage forward or reverse with the engine ON is stronger (there is more power from the engine towards the propeller when it is running than from the prop to the engine --through the gear-box--when the engine is OFF). This true for every boat with a fixed prop and mechanic gear-box. For those with Autoprop and mechanic gear-box (mainly SMs), they engage forward in order to stop the prop spinning. They don't necessarily need to start the engine with forward engaged. For those with Autoprop and hydraulic gear-box, they leave the throttle lever in neutral position, the shaft brake system doing the job. In both, while sailing and as the engine starts, the Autoprop will spin before forward is engaged. This is not a big deal BUT it is better to drop boat speed (if possible) before engaging forward. This will give a smaller shock to the gear-box and soft coupling. I'm not sure if this is all clear to everyone, so, feel free for questions... Olivier
On Monday, March 11, 2019, 11:30:23 PM GMT+1, Danny and Yvonne SIMMS <simms@...> wrote:
Hi Mark, the important thing is the clunk. My sign says no to forward, but as I said in my previous just to be contrary sometimes its clunk in forward, sometimes reverse. I don't think it has anything to do wit the prop. I have auto prop So I just go with the clunk. Regards Danny On 12 March 2019 at 07:58 Mark Erdos <mcerdos@...> wrote:
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Gerhard Mueller
Same sticker here at my Sharki. I guess the bearings of the gearbox are not lubricated enough anymore when shift is in forward position while sailing.
-- Gerhard Mueller Amel Sharki #60 Currently Kalamata, Greece |
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marklesparkle59
Gerhard there is no sticker on Sea Hobo, Do I have the same gearbox as you? Can you tell from this photo? Mark Sent from my Samsung device 
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Warren Traill <trailz@...>
Thankyou Olivier. Your explanation is abundantly clear to me and a relief to know that my practise of engaging reverse while sailing has been the right one. Cheers, Warren
From: main@AmelYachtOwners.groups.io [mailto:main@AmelYachtOwners.groups.io] On Behalf Of Beaute Olivier via Groups.Io
Sent: Tuesday, 12 March 2019 4:13 PM To: main@AmelYachtOwners.groups.io Subject: Re: [AmelYachtOwners] Sharki shaft alternator
Hello Warrren,
on a Sharki with fixed prop, while sailing, you should stop the propeller by engaging reverse. This will reduce noise and packing stuff wear. There will be a "clunk" which could surprise you but don't worry, the clutch shock when you engage forward or reverse with the engine ON is stronger (there is more power from the engine towards the propeller when it is running than from the prop to the engine --through the gear-box--when the engine is OFF). This true for every boat with a fixed prop and mechanic gear-box.
For those with Autoprop and mechanic gear-box (mainly SMs), they engage forward in order to stop the prop spinning. They don't necessarily need to start the engine with forward engaged. For those with Autoprop and hydraulic gear-box, they leave the throttle lever in neutral position, the shaft brake system doing the job. In both, while sailing and as the engine starts, the Autoprop will spin before forward is engaged. This is not a big deal BUT it is better to drop boat speed (if possible) before engaging forward. This will give a smaller shock to the gear-box and soft coupling.
I'm not sure if this is all clear to everyone, so, feel free for questions...
Olivier On Monday, March 11, 2019, 11:30:23 PM GMT+1, Danny and Yvonne SIMMS <simms@...> wrote:
Hi Mark, the important thing is the clunk. My sign says no to forward, but as I said in my previous just to be contrary sometimes its clunk in forward, sometimes reverse. I don't think it has anything to do wit the prop. I have auto prop So I just go with the clunk. Regards Danny
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smiles bernard
That looks like my hurth Mark!
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What is the model number ? It has a ID plate on the top All the best Miles On 12 Mar 2019, at 05:41, marklesparkle59 <marklesparkle59@...> wrote:
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Gerhard Mueller
Mark
your picture looks like the same gearbox as I have. I will dive tomorrow into the engine room to check the type of the Hurth gearbox. The sticker was in french and english language and I renewed it now in german language because it was getting bad after 35 years. -- Gerhard Mueller Amel Sharki #60 Currently Kalamata, Greece |
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marklesparkle59
Thanks for that Miles. The engine is a Perkins 4108 I will check the gear box n ext visit. Am I right that the starboard alternator is also called the engine alternator and the port is aka domestic? We have a mixture of original and new electrical equipment and I am keen for any comments on the photos. I dont really understand what these gauges and the Sterling box are telling me or doing. The red light on the main board never goes out, what does that indicate? Do all Sharkis have a similar system? Mark Sent from my Samsung device -------- Original message -------- From: "smiles bernard via Groups.Io" <smilesbernard@...> Date: 12/03/2019 16:43 (GMT+00:00) To: main@AmelYachtOwners.groups.io Subject: Re: [AmelYachtOwners] Sharki shaft alternator That looks like my hurth Mark! What is the model number ? It has a ID plate on the top All the best Miles
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Aras Grinius <n33077@...>
Gerhart,
The red lighting means a lack of rpm on the prop shaft; that the generator is not charging Aras Grinius SV Fiasco, Sharki #163 |
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