http://www.mb2a50s.co.uk/forum/ Fri, 30 Jul 2010 05:36:13 +0100 MyBB http://www.mb2a50s.co.uk/forum/showthread.php?tid=109 Wed, 28 Jul 2010 07:17:42 +0100 http://www.mb2a50s.co.uk/forum/showthread.php?tid=109 Sorry to start a new thread on this subject but last seems to be lost in a time loop. (Probably my fault for being usless on computers)

I am looking for a coil which I think is Honda part number 0327189(Item 4 on page 14 of the manual). It is a coil distributor and has two plug lead connections.

Is this available and if so how much to post to 50054 Fucecchio Firenze Italy.
Thank you in anticipation

Sandy]]> Sorry to start a new thread on this subject but last seems to be lost in a time loop. (Probably my fault for being usless on computers)

I am looking for a coil which I think is Honda part number 0327189(Item 4 on page 14 of the manual). It is a coil distributor and has two plug lead connections.

Is this available and if so how much to post to 50054 Fucecchio Firenze Italy.
Thank you in anticipation

Sandy]]> http://www.mb2a50s.co.uk/forum/showthread.php?tid=108 Mon, 26 Jul 2010 09:52:10 +0100 http://www.mb2a50s.co.uk/forum/showthread.php?tid=108
We are experiencing some problems with our Mb2/50s, since it barely gives us enough power to get out of and into the harbour. We have a "normal" 26 foot sailboat and a standard fixed-two-blade propellar.

The engine has normally (this is our first season) been able to drive us at about 3-4 knots in no-wind conditions, which I guess is OK, but not great. But yesterday we could barely enter the harbour, which caused some concern with the crew.

I would thus like to ask, 1) how much speed you get out of your engines and 2) if anyone has any idea of why the engine doesn't give us more power?

With best regards and many thanks for a great forum!

Soren]]>
We are experiencing some problems with our Mb2/50s, since it barely gives us enough power to get out of and into the harbour. We have a "normal" 26 foot sailboat and a standard fixed-two-blade propellar.

The engine has normally (this is our first season) been able to drive us at about 3-4 knots in no-wind conditions, which I guess is OK, but not great. But yesterday we could barely enter the harbour, which caused some concern with the crew.

I would thus like to ask, 1) how much speed you get out of your engines and 2) if anyone has any idea of why the engine doesn't give us more power?

With best regards and many thanks for a great forum!

Soren]]> http://www.mb2a50s.co.uk/forum/showthread.php?tid=107 Sun, 25 Jul 2010 08:46:21 +0100 http://www.mb2a50s.co.uk/forum/showthread.php?tid=107
still having all kinds of trouble with my MB2A, I got my hands on a Honda BF6B outboard motor. Looking at the engine and it specs, it seems it has not changed a lot since the BF75 basis the MB2A was built on.

Question: Is it possible to either replace the MB2A completely by a BF8A/6B (needs to fit the saildrive and exhaust etc.) or parts of it?

Greetings Harald]]>
still having all kinds of trouble with my MB2A, I got my hands on a Honda BF6B outboard motor. Looking at the engine and it specs, it seems it has not changed a lot since the BF75 basis the MB2A was built on.

Question: Is it possible to either replace the MB2A completely by a BF8A/6B (needs to fit the saildrive and exhaust etc.) or parts of it?

Greetings Harald]]> http://www.mb2a50s.co.uk/forum/showthread.php?tid=106 Tue, 20 Jul 2010 19:41:08 +0100 http://www.mb2a50s.co.uk/forum/showthread.php?tid=106 I am looking for an ignition coilpack and postage to 50054 Fucecchio Italy.

Can anyone advise of total cost and availability.

Thankyou in anticipation

Sandy]]> I am looking for an ignition coilpack and postage to 50054 Fucecchio Italy.

Can anyone advise of total cost and availability.

Thankyou in anticipation

Sandy]]> http://www.mb2a50s.co.uk/forum/showthread.php?tid=105 Tue, 20 Jul 2010 12:57:28 +0100 http://www.mb2a50s.co.uk/forum/showthread.php?tid=105
I was just towed to harbour with my MB2a not willing to start any more. I had some starting problems in the last weeks, the engine started immediately the time before.

Now, the engine does not start any more.

I checked the whole electric systems, the resistances for the exciter and ignition coils are correct. The sparks for both ignition plugs are yellow, this might be a hint? Fuel supply seems to be o.k. as the plugs get wet after excessive starting exercises.

I have no new plugs at hand as I'm on a island with limited supplies. They are not too old anyway.

Any hints? Are the yellow sparks a clear indication for a failure of the ignition coil?

Thanks, Harald]]>
I was just towed to harbour with my MB2a not willing to start any more. I had some starting problems in the last weeks, the engine started immediately the time before.

Now, the engine does not start any more.

I checked the whole electric systems, the resistances for the exciter and ignition coils are correct. The sparks for both ignition plugs are yellow, this might be a hint? Fuel supply seems to be o.k. as the plugs get wet after excessive starting exercises.

I have no new plugs at hand as I'm on a island with limited supplies. They are not too old anyway.

Any hints? Are the yellow sparks a clear indication for a failure of the ignition coil?

Thanks, Harald]]> http://www.mb2a50s.co.uk/forum/showthread.php?tid=104 Tue, 20 Jul 2010 00:21:09 +0100 http://www.mb2a50s.co.uk/forum/showthread.php?tid=104
The broker selling the yacht reckons the engine wants chucking and replacing with an outboard, as in his experience it will be nothing but trouble even if repaired.

I'd like to believe otherwise, and what I've seen of this forum so far gives me hope!

Now I suspect the boat has been left unused for a couple of years, judging by the general condition of everything, and I'm wondering whether it might even be the gearbox / intermediate drive that is jammed or seized.

Is it possible to split the engine from the drive leg with the boat afloat?

If so I'd be reasonably happy to do that and could then quickly see which part is locked up, and also bring the engine home and give it a proper looking at on the bench. If we buy the boat it'll have to come out briefly for survey so I can check prop and final drive then, but what I don't want to end up in is a situation where I have to pay for shore storage at a yard whilst I tinker about with the engine.

Any advice much appreciated...]]>
The broker selling the yacht reckons the engine wants chucking and replacing with an outboard, as in his experience it will be nothing but trouble even if repaired.

I'd like to believe otherwise, and what I've seen of this forum so far gives me hope!

Now I suspect the boat has been left unused for a couple of years, judging by the general condition of everything, and I'm wondering whether it might even be the gearbox / intermediate drive that is jammed or seized.

Is it possible to split the engine from the drive leg with the boat afloat?

If so I'd be reasonably happy to do that and could then quickly see which part is locked up, and also bring the engine home and give it a proper looking at on the bench. If we buy the boat it'll have to come out briefly for survey so I can check prop and final drive then, but what I don't want to end up in is a situation where I have to pay for shore storage at a yard whilst I tinker about with the engine.

Any advice much appreciated...]]> http://www.mb2a50s.co.uk/forum/showthread.php?tid=103 Sat, 17 Jul 2010 17:59:08 +0100 http://www.mb2a50s.co.uk/forum/showthread.php?tid=103
The one on my engine is quite badly scored by the seal. The diameter is about 24.95mm but in the grooves only about 24.81 so the grooves are about 0.07 deep. That's only a few thou but this holds back the sea!

(Or am I being too fussy?)

Thanks

Steve]]>
The one on my engine is quite badly scored by the seal. The diameter is about 24.95mm but in the grooves only about 24.81 so the grooves are about 0.07 deep. That's only a few thou but this holds back the sea!

(Or am I being too fussy?)

Thanks

Steve]]> http://www.mb2a50s.co.uk/forum/showthread.php?tid=102 Mon, 28 Jun 2010 11:51:53 +0100 http://www.mb2a50s.co.uk/forum/showthread.php?tid=102
Last sunday I was cruising down a complete flat and windless lake at low throttle. A motor vessel was coming from behind and was producing high waves. These waves made the boat heavily and after a few seconds the engine died as if there was no fuel. I manually pumped some fuel to the engine and It ran flawless. Can somebody explain this. Fuel tank is clean, fresh fuel, new filters, clear carburator.

Further I was wondering when and how you use your Choke? Documentation states that you should use it only when colder than 20 degrees celsius.

Greets.]]>
Last sunday I was cruising down a complete flat and windless lake at low throttle. A motor vessel was coming from behind and was producing high waves. These waves made the boat heavily and after a few seconds the engine died as if there was no fuel. I manually pumped some fuel to the engine and It ran flawless. Can somebody explain this. Fuel tank is clean, fresh fuel, new filters, clear carburator.

Further I was wondering when and how you use your Choke? Documentation states that you should use it only when colder than 20 degrees celsius.

Greets.]]> http://www.mb2a50s.co.uk/forum/showthread.php?tid=101 Tue, 22 Jun 2010 14:37:01 +0100 http://www.mb2a50s.co.uk/forum/showthread.php?tid=101 The manual doesnt mention the output voltage but the lights are marked 12v and I guess the alarm is too. The low voltage isn't enough to even make the lights glow and even less make the alarm buzz.
The brown cable from the coil going to the CDI gives about 30 volts? The charging coil works fine and gives about 11-12 volts when reving up the engine a bit.

Any idea what could be wrong or have I missed something?]]> The manual doesnt mention the output voltage but the lights are marked 12v and I guess the alarm is too. The low voltage isn't enough to even make the lights glow and even less make the alarm buzz.
The brown cable from the coil going to the CDI gives about 30 volts? The charging coil works fine and gives about 11-12 volts when reving up the engine a bit.

Any idea what could be wrong or have I missed something?]]> http://www.mb2a50s.co.uk/forum/showthread.php?tid=100 Sun, 20 Jun 2010 11:40:37 +0100 http://www.mb2a50s.co.uk/forum/showthread.php?tid=100
Can some one help me please.

rgrds

Ron]]>
Can some one help me please.

rgrds

Ron]]> http://www.mb2a50s.co.uk/forum/showthread.php?tid=99 Sat, 19 Jun 2010 18:01:42 +0100 http://www.mb2a50s.co.uk/forum/showthread.php?tid=99 I am presuming it is just the drive/shear pin on shaft by prop..
So, after all that, can anyone tell me where I can buy shear/drive pins at this time??

Thanks, Dave Price (Invader 22 - Goldcrest)]]> I am presuming it is just the drive/shear pin on shaft by prop..
So, after all that, can anyone tell me where I can buy shear/drive pins at this time??

Thanks, Dave Price (Invader 22 - Goldcrest)]]> http://www.mb2a50s.co.uk/forum/showthread.php?tid=98 Fri, 18 Jun 2010 11:07:54 +0100 http://www.mb2a50s.co.uk/forum/showthread.php?tid=98
I am currently looking for spare parts on the Gearbox of the VP MB2A50s.
Now I have found a part for sale that should exactly match this gearbox. It is a gearbox of an Volvo Penta 20/25 hp outboard that was also used by Volvo Penta on the MB2A 50s Saildrive.

I have attached a picture from that part that I found and a picture of the orginal gearbox.

Could anybody tell me if these parts are interchangeable.

Greets and thanks in advance.

Brouwer
Friendship 22
Holland]]>
I am currently looking for spare parts on the Gearbox of the VP MB2A50s.
Now I have found a part for sale that should exactly match this gearbox. It is a gearbox of an Volvo Penta 20/25 hp outboard that was also used by Volvo Penta on the MB2A 50s Saildrive.

I have attached a picture from that part that I found and a picture of the orginal gearbox.

Could anybody tell me if these parts are interchangeable.

Greets and thanks in advance.

Brouwer
Friendship 22
Holland]]> http://www.mb2a50s.co.uk/forum/showthread.php?tid=97 Tue, 15 Jun 2010 19:28:59 +0100 http://www.mb2a50s.co.uk/forum/showthread.php?tid=97
When I go from neutral to reverse there is this mechanical sound like trying to shift without using a clutch. After 1-2 seconds everything is fine again. Shifting forward is as smooth as it can be... Any ideas what could be wrong or is this normal behaviour?

Best wishes
Nicolas]]>
When I go from neutral to reverse there is this mechanical sound like trying to shift without using a clutch. After 1-2 seconds everything is fine again. Shifting forward is as smooth as it can be... Any ideas what could be wrong or is this normal behaviour?

Best wishes
Nicolas]]> http://www.mb2a50s.co.uk/forum/showthread.php?tid=96 Tue, 01 Jun 2010 22:55:26 +0100 http://www.mb2a50s.co.uk/forum/showthread.php?tid=96 http://cgi.ebay.co.uk/ws/eBayISAPI.dll?V...:MESELX:IT]]> http://cgi.ebay.co.uk/ws/eBayISAPI.dll?V...:MESELX:IT]]> http://www.mb2a50s.co.uk/forum/showthread.php?tid=95 Fri, 21 May 2010 13:48:03 +0100 http://www.mb2a50s.co.uk/forum/showthread.php?tid=95 I am in Hasselt right abbove Zwolle where are you?
My boat is a Wing 720 Compaen.
Plan to fit an electric start using a beetle generator.
Need to fix water in the engine oil problem first]]> I am in Hasselt right abbove Zwolle where are you?
My boat is a Wing 720 Compaen.
Plan to fit an electric start using a beetle generator.
Need to fix water in the engine oil problem first]]> http://www.mb2a50s.co.uk/forum/showthread.php?tid=94 Tue, 27 Apr 2010 17:43:29 +0100 http://www.mb2a50s.co.uk/forum/showthread.php?tid=94 http://www.mb2a50s.co.uk/forum/showthread.php?tid=93 Tue, 20 Apr 2010 22:15:06 +0100 http://www.mb2a50s.co.uk/forum/showthread.php?tid=93
Anyone following my recent posts will know I was planning to use a carb from a Honda outboard B100 (the 9.9HP version).

However now I have looked at it I have found an important difference. The outboard carb has a fitting (hose barb?) to take a rubber fuel pipe. This is fitted at 90deg on a tube that is tapered to make an interference fit (pressed in) in the hole in the carb body.

The MB2A carb has an extended shoulder on the hole, and the hole is threaded to take a bolt so that the banjo coupling can be screwed down (because the inboard uses a metal fuel pipe).

Has anyone successfully adapted an outboard carb to fit the metal pipe? I would like to know how.

I thought of tapping a thread into the hole. It is a blind hole so that could be tricky, but even if I can get the taps to do that, there would not be much thread and I would have to cut down the bolt, not leaving much to grip, and it has to take enough force to seal two copper washers. I doubt if a few threads in the alloy would be strong enough. I also thought about adapting the brass tube fitting to mate with the banjo fitting but I can't see a way to do that.

Any ideas anyone?]]>
Anyone following my recent posts will know I was planning to use a carb from a Honda outboard B100 (the 9.9HP version).

However now I have looked at it I have found an important difference. The outboard carb has a fitting (hose barb?) to take a rubber fuel pipe. This is fitted at 90deg on a tube that is tapered to make an interference fit (pressed in) in the hole in the carb body.

The MB2A carb has an extended shoulder on the hole, and the hole is threaded to take a bolt so that the banjo coupling can be screwed down (because the inboard uses a metal fuel pipe).

Has anyone successfully adapted an outboard carb to fit the metal pipe? I would like to know how.

I thought of tapping a thread into the hole. It is a blind hole so that could be tricky, but even if I can get the taps to do that, there would not be much thread and I would have to cut down the bolt, not leaving much to grip, and it has to take enough force to seal two copper washers. I doubt if a few threads in the alloy would be strong enough. I also thought about adapting the brass tube fitting to mate with the banjo fitting but I can't see a way to do that.

Any ideas anyone?]]> http://www.mb2a50s.co.uk/forum/showthread.php?tid=92 Mon, 12 Apr 2010 16:29:24 +0100 http://www.mb2a50s.co.uk/forum/showthread.php?tid=92
The donor engine I am planning to take parts from has no venturi in the water pipe that goes into the top of the manifold. It is a small tube with a flange on the end, number 14 on page 12 of my Volvo workshop manual.

I can't currently get hold of my own boat engine to measure it. Does anyone have one handy that they could measure please? I need the internal bore diameter and the length. With that info I can make one. I want to get this engine running properly before I transplant it or its parts (currently it overheats).

Very many thanks

Steve]]>
The donor engine I am planning to take parts from has no venturi in the water pipe that goes into the top of the manifold. It is a small tube with a flange on the end, number 14 on page 12 of my Volvo workshop manual.

I can't currently get hold of my own boat engine to measure it. Does anyone have one handy that they could measure please? I need the internal bore diameter and the length. With that info I can make one. I want to get this engine running properly before I transplant it or its parts (currently it overheats).

Very many thanks

Steve]]> http://www.mb2a50s.co.uk/forum/showthread.php?tid=91 Sun, 11 Apr 2010 11:23:05 +0100 http://www.mb2a50s.co.uk/forum/showthread.php?tid=91
Would any member have knowledge of a GRP engine base moulding available ? A friend in the UK has an engine ready to go in but needs either to obtain a base moulding or borrow one to make a copy.]]>
Would any member have knowledge of a GRP engine base moulding available ? A friend in the UK has an engine ready to go in but needs either to obtain a base moulding or borrow one to make a copy.]]> http://www.mb2a50s.co.uk/forum/showthread.php?tid=90 Thu, 08 Apr 2010 18:17:08 +0100 http://www.mb2a50s.co.uk/forum/showthread.php?tid=90
I have had a MB2A for many years, and done lots of jobs on it, including a full rebuild; but considering I can't get it to start at the moment I can't call myself an expert! I am an engineer but not an engine specialist.

I think the biggest problem with this engine is that you can't lift the engine out of the boat without lifting the boat out of the water. So any work is difficult.

I look forward to hearing from anyone who wants to get in touch.

Steve]]>
I have had a MB2A for many years, and done lots of jobs on it, including a full rebuild; but considering I can't get it to start at the moment I can't call myself an expert! I am an engineer but not an engine specialist.

I think the biggest problem with this engine is that you can't lift the engine out of the boat without lifting the boat out of the water. So any work is difficult.

I look forward to hearing from anyone who wants to get in touch.

Steve]]>