Hi,

I assumed you had an autoprop.

Yes you have to drain the tank.

The filter in the tank is similar to the screens in the shower drains.

That is all I can think of. Can you get the engine up to 3000 rpm with the transmission in neutral?

You could also have clogged injectors.

Fair Winds

Eric

Kimberlite Amel Super Maramu #376

 

 

 

From: amelyachtowners@... [mailto:amelyachtowners@...]
Sent: Saturday, December 05, 2015 1:17 AM
To: amelyachtowners@...
Subject: [Amel Yacht Owners] Fuel Tank Filter, Variprop

 

 

Hi Eric,

Thanks for the info.  I was unaware of such a filter at the fuel valve.  So to check and service it I am assuming you have to empty the fuel tank.  Is the filter a coarse screen?  Anyone else have this clog?

 

Regarding props.  I am sure the Autoprop and Maxprop are excellent but let me throw in another possibility. Our Super Maramu (100 HP Yanmar) has a German Variprop "Blue Water" 4-Blade prop and IMHO it is excellent. Lots of power, lots of speed and zero vibration.  It seems to be a very good match for the SM.  Works well at low to high rpms and in reverse, setting the anchor I have to be careful to make sure the chain does't jump the windlass. In forward it can really punch through chop or hit speed and seems to like to motorsail as well.   It is easy to remove from the shaft and the nut is held in place by torque and then 3 set screws. The factory is extremely responsive and helpful.  When I talked to them by phone they knew my boat and the German owner who had bought the prop.  They will have exactly the specs for a Super Maramu.

 

Again, I cannot compare it to the other props (my Santorin had the fixed 3 blade) but it might be worth a look if you are in the market for a replacement prop.

 

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Bob, SV KAIMI 429, Fethiye, Turkey

 

 

Ben

We have the same motor and this is exactly what happens immediately when the prop and hull needs cleaning, ie engine revs decrease. I now dive and clean the prop in between replacing the bottom paint, at least 3 x per annum. Amazing how the engine and boat speed pick up automatically with a few hours spent with scuba gear under the boat. These engines tend to run cool so that is normal.

We really like the Yanmar 75 / Amel 53 combination. You have a great engine there which pushes the boat along nicely with well under 3.5l/hr fuel usage at 6.3 - 7kts day in day out based on our trip from Canary Islands to Australia where we did 1000 hours of motoring being a delivery trip with many days of no wind in the Pacific and Atlantic.

Colin & Lauren Streeter

Island Pearl II - Amel 53

Brisbane Australia

On Sat, Dec 5, 2015 at 1:11 PM, sailormon kimberlite@... [amelyachtowners] <amelyachtowners@...> wrote:

 

I am sorry that I did not ask if you have cleaned the prop lately. The autoprop is very sensitive to even a small buildup of growth,

Fair Winds

Eric

 

 

From: amelyachtowners@... [mailto:amelyachtowners@...]
Sent: Friday, December 04, 2015 9:51 PM
To: amelyachtowners@...
Subject: RE: [Amel Yacht Owners] LOW ENGINE RPMS ON YANMAR 75

 

 

Ben,

2 things come to mind. Both of which I have experienced. Was your prop greased or rebuilt?

I had a similar problem till I rebuilt the autoprop. It Is amazing how much just a little play will

Cause you to loose speed.

 

Secondly, Amel uses some kind of blue silicone on the inspection ports on the fuel tank.

I had a problem with the engine slowing down. There is a plastic filter INSIDE the fuel tank at the valve at the bottom. . At one point the engine actually stopped. I took an air horn and put the bell of it over the rubber part of the fuel line and it blew the silicone off of the filter I removed this filter and found it clogged with blue silicone. You need a very thin wrench- we used to call it a tappet wrench- to take apart the fuel valve.

 

My first guess is that your prop needs a rebuild.

If you are in the USA you can get what you need from AB marine and they will rent you the 2 special tools needed for the job. It is not a difficult job just time consuming.

Fair Winds

Eric

Kimberlite Amel Super Maramu #376

 

 

From: amelyachtowners@... [mailto:amelyachtowners@...]
Sent: Friday, December 04, 2015 11:10 AM
To: amelyachtowners@...
Subject: [Amel Yacht Owners] LOW ENGINE RPMS ON YANMAR 75

 

 

I bought my SM in Feb 2015  and there are still many systems I need to better understand.  Most perplexing is I have seen declining engine RPMs since original survey.  Originally boat produced about 3100 RPMs (Yanmar manual says 3600/3800 tops - but I do know Autoprop may limit that number)  but has since declined to 1800.  Not sure why as engine seems to run fine - easy start, no smoke, no roughness at any RPM.  Racor and engine filters are new.  Manual shut off valve in passageway  is wide open (it actually will not shut off motor... but that's another issue).   I do have an Autoprop which was serviced well over a year ago - but not sure - by previous owner. Only other engine oddity as it runs very cold - never over 130F.   Boat has been in the water now for a little over a year with not much motor use.  Any and all suggestions would be welcome. 

 

Ben Driver

SM #347

La Bella Vita

--

Colin Streeter

0411 016 445

 

I am sorry that I did not ask if you have cleaned the prop lately. The autoprop is very sensitive to even a small buildup of growth,

Fair Winds

Eric

 

 

From: amelyachtowners@... [mailto:amelyachtowners@...]
Sent: Friday, December 04, 2015 9:51 PM
To: amelyachtowners@...
Subject: RE: [Amel Yacht Owners] LOW ENGINE RPMS ON YANMAR 75

 

 

Ben,

2 things come to mind. Both of which I have experienced. Was your prop greased or rebuilt?

I had a similar problem till I rebuilt the autoprop. It Is amazing how much just a little play will

Cause you to loose speed.

 

Secondly, Amel uses some kind of blue silicone on the inspection ports on the fuel tank.

I had a problem with the engine slowing down. There is a plastic filter INSIDE the fuel tank at the valve at the bottom. . At one point the engine actually stopped. I took an air horn and put the bell of it over the rubber part of the fuel line and it blew the silicone off of the filter I removed this filter and found it clogged with blue silicone. You need a very thin wrench- we used to call it a tappet wrench- to take apart the fuel valve.

 

My first guess is that your prop needs a rebuild.

If you are in the USA you can get what you need from AB marine and they will rent you the 2 special tools needed for the job. It is not a difficult job just time consuming.

Fair Winds

Eric

Kimberlite Amel Super Maramu #376

 

 

From: amelyachtowners@... [mailto:amelyachtowners@...]
Sent: Friday, December 04, 2015 11:10 AM
To: amelyachtowners@...
Subject: [Amel Yacht Owners] LOW ENGINE RPMS ON YANMAR 75

 

 

I bought my SM in Feb 2015  and there are still many systems I need to better understand.  Most perplexing is I have seen declining engine RPMs since original survey.  Originally boat produced about 3100 RPMs (Yanmar manual says 3600/3800 tops - but I do know Autoprop may limit that number)  but has since declined to 1800.  Not sure why as engine seems to run fine - easy start, no smoke, no roughness at any RPM.  Racor and engine filters are new.  Manual shut off valve in passageway  is wide open (it actually will not shut off motor... but that's another issue).   I do have an Autoprop which was serviced well over a year ago - but not sure - by previous owner. Only other engine oddity as it runs very cold - never over 130F.   Boat has been in the water now for a little over a year with not much motor use.  Any and all suggestions would be welcome. 

 

Ben Driver

SM #347

La Bella Vita

 

Ben,

2 things come to mind. Both of which I have experienced. Was your prop greased or rebuilt?

I had a similar problem till I rebuilt the autoprop. It Is amazing how much just a little play will

Cause you to loose speed.

 

Secondly, Amel uses some kind of blue silicone on the inspection ports on the fuel tank.

I had a problem with the engine slowing down. There is a plastic filter INSIDE the fuel tank at the valve at the bottom. . At one point the engine actually stopped. I took an air horn and put the bell of it over the rubber part of the fuel line and it blew the silicone off of the filter I removed this filter and found it clogged with blue silicone. You need a very thin wrench- we used to call it a tappet wrench- to take apart the fuel valve.

 

My first guess is that your prop needs a rebuild.

If you are in the USA you can get what you need from AB marine and they will rent you the 2 special tools needed for the job. It is not a difficult job just time consuming.

Fair Winds

Eric

Kimberlite Amel Super Maramu #376

 

 

From: amelyachtowners@... [mailto:amelyachtowners@...]
Sent: Friday, December 04, 2015 11:10 AM
To: amelyachtowners@...
Subject: [Amel Yacht Owners] LOW ENGINE RPMS ON YANMAR 75

 

 

I bought my SM in Feb 2015  and there are still many systems I need to better understand.  Most perplexing is I have seen declining engine RPMs since original survey.  Originally boat produced about 3100 RPMs (Yanmar manual says 3600/3800 tops - but I do know Autoprop may limit that number)  but has since declined to 1800.  Not sure why as engine seems to run fine - easy start, no smoke, no roughness at any RPM.  Racor and engine filters are new.  Manual shut off valve in passageway  is wide open (it actually will not shut off motor... but that's another issue).   I do have an Autoprop which was serviced well over a year ago - but not sure - by previous owner. Only other engine oddity as it runs very cold - never over 130F.   Boat has been in the water now for a little over a year with not much motor use.  Any and all suggestions would be welcome. 

 

Ben Driver

SM #347

La Bella Vita

 

Hi Ben,

the only thing to check at first is your prop: Is it clean? Are the blades rotating free?

Then only, you will put your hands in fuel...

Olivier

On Friday, December 4, 2015 9:45 PM, "rxc@... [amelyachtowners]" <amelyachtowners@...> wrote:

 

I have a Yanmar 75 on my Jeanneau 43 (I follow the Amel list in the hope of one day buying one), and I had this same problem when I first bought the boat.  I have a fixed prop, but the problem turned out to be a clogged fuel pickup tube.  The boat had not been used very much when I bought it (100 hrs at 3 years old), and the dealer who sold the boat to me eventually found that the pickup tube was full of plastic shavings.  Likely left behind when the plastic fuel tank had the fitting installed originally.

You have checked all the obvious source of blockage, and if you find that your prop is not too fouled, then I would recommend pulling the fuel pickup tube.  Some boats have a rubber hose and a screen installed on these pickups (for regulatory reasons), and the screens are known to accumulate debris.

Ralph Caruso

s/v Petillant  Jeanneau SO43DS

 

I have a Yanmar 75 on my Jeanneau 43 (I follow the Amel list in the hope of one day buying one), and I had this same problem when I first bought the boat.  I have a fixed prop, but the problem turned out to be a clogged fuel pickup tube.  The boat had not been used very much when I bought it (100 hrs at 3 years old), and the dealer who sold the boat to me eventually found that the pickup tube was full of plastic shavings.  Likely left behind when the plastic fuel tank had the fitting installed originally.

You have checked all the obvious source of blockage, and if you find that your prop is not too fouled, then I would recommend pulling the fuel pickup tube.  Some boats have a rubber hose and a screen installed on these pickups (for regulatory reasons), and the screens are known to accumulate debris.

Ralph Caruso

s/v Petillant  Jeanneau SO43DS

 

John,

Good call on the thermostat.

If you do not know how to check it, Google it for lots of information and videos.

Bill

BeBe 387

Gran Canaria

On Fri, Dec 4, 2015 at 7:21 PM, jjjk12s@... [amelyachtowners] <amelyachtowners@...> wrote:

 

Ben,

 

For the RPM - something super simple to check first - have you disconnected the throttle cable and checked the revs by directly operating the lever on the fuel pump? Without any other symptoms maybe your throttle cable has gradually become badly adjusted.

The cold running might be due to someone having removed the thermostat or the thermostat not working,

 

John Maramu #91 Popeye (with a Yanmar 75)

 

Ben,

 

For the RPM - something super simple to check first - have you disconnected the throttle cable and checked the revs by directly operating the lever on the fuel pump? Without any other symptoms maybe your throttle cable has gradually become badly adjusted.

The cold running might be due to someone having removed the thermostat or the thermostat not working,

 

John Maramu #91 Popeye (with a Yanmar 75)

 

Ben, everything you describe points to a dirty prop and hull. Heavy marine growth particularly on the prop can virtually stop engine. Does it rev freely when in neutral? 

The correct running temp. is 80C around 175 F easily checked with a laser temperature reader to confirm validity of your gauge.

Regards,

Trevor Seafever

SM 425 Redline

Mexico

FOR SALE

$295K

---In amelyachtowners@..., wrote :

I bought my SM in Feb 2015  and there are still many systems I need to better understand.  Most perplexing is I have seen declining engine RPMs since original survey.  Originally boat produced about 3100 RPMs (Yanmar manual says 3600/3800 tops - but I do know Autoprop may limit that number)  but has since declined to 1800.  Not sure why as engine seems to run fine - easy start, no smoke, no roughness at any RPM.  Racor and engine filters are new.  Manual shut off valve in passageway  is wide open (it actually will not shut off motor... but that's another issue).   I do have an Autoprop which was serviced well over a year ago - but not sure - by previous owner. Only other engine oddity as it runs very cold - never over 130F.   Boat has been in the water now for a little over a year with not much motor use.  Any and all suggestions would be welcome. 

Ben Driver

SM #347

La Bella Vita

 

The most common low rpm cause with an AutoProp is a dirty/fouled AutoProp.

It does not take much fouling to cause the blade(s) on an AutoProp to dig too deeply in the water causing low RPMSs. When was the last time you or someone else dove and inspected the prop.

Bill

BeBe 387

On Fri, Dec 4, 2015 at 4:09 PM, joedoakes66@... [amelyachtowners] <amelyachtowners@...> wrote:

 

I bought my SM in Feb 2015  and there are still many systems I need to better understand.  Most perplexing is I have seen declining engine RPMs since original survey.  Originally boat produced about 3100 RPMs (Yanmar manual says 3600/3800 tops - but I do know Autoprop may limit that number)  but has since declined to 1800.  Not sure why as engine seems to run fine - easy start, no smoke, no roughness at any RPM.  Racor and engine filters are new.  Manual shut off valve in passageway  is wide open (it actually will not shut off motor... but that's another issue).   I do have an Autoprop which was serviced well over a year ago - but not sure - by previous owner. Only other engine oddity as it runs very cold - never over 130F.   Boat has been in the water now for a little over a year with not much motor use.  Any and all suggestions would be welcome. 

Ben Driver

SM #347

La Bella Vita

 

Hello Ben,

I have a Volvo TDM 22 but diesels are diesels…

I encountered these symptoms on another boat… badly crusted propeller…

Other cause might be a faulty turbocharger.  Generally, we tend to baby our engines and this is not good.  I try to run at 80% or more power for 1 hour out of every 24 hrs of engine time.

Third possibility = a collapsed air filter.  BTDT.

Good luck.. at least the trouble shooting should be easy.

Jean-Pierre Germain,

SY Eleuthera, Amel Super Maramu 007

Porto Turistico Marina di Ragusa, Pontoon M15,

97100 Ragusa, Sicily, Italy
+44 7551 211 511
sy.eleuthera@...

jp.germain@...

jp.germain45@...

On 4 Dec 2015, at 17:09, joedoakes66@... [amelyachtowners] <amelyachtowners@...> wrote:

 

I bought my SM in Feb 2015  and there are still many systems I need to better understand.  Most perplexing is I have seen declining engine RPMs since original survey.  Originally boat produced about 3100 RPMs (Yanmar manual says 3600/3800 tops - but I do know Autoprop may limit that number)  but has since declined to 1800.  Not sure why as engine seems to run fine - easy start, no smoke, no roughness at any RPM.  Racor and engine filters are new.  Manual shut off valve in passageway  is wide open (it actually will not shut off motor... but that's another issue).   I do have an Autoprop which was serviced well over a year ago - but not sure - by previous owner. Only other engine oddity as it runs very cold - never over 130F.   Boat has been in the water now for a little over a year with not much motor use.  Any and all suggestions would be welcome. 

Ben Driver

SM #347

La Bella Vita

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If I were king of the Amel Forum, I would move away from Yahoo altogether and subscribe to a more contemporary platform--then migrate all the Amel forum archives over to the new platform.  I would look for one that allowed, for example, the ability to post a photo or video--or link to a photo or video --within a message. ("Here's a photo of the bow thruster breaker, Kent, located in the forward port cabin locker..." "Here's a photo of my corroded anchor chain. Do I need a new chain? Or is there a way to clean this up?..." "Here's a link to a YouTube that shows how to dismantle and serviceq the motor for the Furler

Rick & Linda Grimes

S/V "Rascal"

SM2K (#404)

609-932-2307

Sent on the run from my iPhone

On Dec 5, 2015, at 6:46 AM, divanz620@... [amelyachtowners] <amelyachtowners@...> wrote:

 

I note it says  "download the fully featured trial version", which implies that someone would need to pay for the full version.
I personally think that the glory days of free internet are coming to an end, and seriously, why not, if it was me I wouldn't be providing all this stuff for nothing.
So, we need to find a way to archive all the stuff that is on this group to...a dropbox....or ???
I'm happy to put in the hard yards to do it, if others are...but we need a secure place to put it all
What does everyone else think ???
Cheers'
Alan
Elyse SM437

 

Kent,

I do not believe there is a breaker for the bow thruster, There might be a Gigondo fuse somewhere but I doubt it.

Fair Winds

Eric

Kimberlite Amel Super Maramu #376

 

 

From: amelyachtowners@... [mailto:amelyachtowners@...]
Sent: Saturday, December 05, 2015 6:57 PM
To: amelyachtowners@...
Subject: Re: [Amel Yacht Owners] Re: Prop Shaft Electrolysis

 

 

Where is the breaker for the bow thruster, if there is one?
Thanks,
Kent
SM253
Kristy