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Post by fishfoxey on Mar 29, 2022 15:58:00 GMT
Has anyone any recommendations and experience of fitting an auxiliary outboard on a MF625. Do people think its needed, and if so what's the lowest horsepower you can get away with. Thx
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Post by ihsan on Mar 30, 2022 23:13:38 GMT
I have done it with 795, by copying pictures of a 755 with auxiliary, which I found in this forum. For the purpose of emergency 6 hp Tohatsu engine gives me around 4-5 knots in fair weather. It is enough to take you to a safe place. The propeller is sail drive type and gives the torque I need. Tohatsu has also another propeller for its 6 hp with 4 blades to be used in heavier boats around 2 tons. Generally a 9.9 is advised for a second engine, and usually preferred for trolling and reliability. However the weight difference is considerable.
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Post by simonmf695 on Mar 31, 2022 16:39:15 GMT
advise from my local yard who sell and service OBs is to spend the money on maintaining your main engine and not rely on a seldom used 'spare' different if you have the need for a troll
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mf755marco
New Member
Posts: 8
Jeanneau Model: MF 755 - 2013
Country: Italy
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Post by mf755marco on Apr 1, 2022 15:34:22 GMT
I have had in my MF755 a Mercury 9.9 with 4 blades propeller. The speed was around 4-5 knots in a calm sea and no wind.
The spare motor was already installed when I bought the boat, the previous owner used it for trolling
Since I was not using for that and only for the emergency, I decided to sell the motor and have an insurance the include the trailer (in case).
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Post by ihsan on Apr 1, 2022 18:09:52 GMT
The user manuel says if you have an engine problem drop down your anchor and call for help. This is meaningful if you are near your base area and in shallow waters. My service, which is a well known one in Turkey, also advised me not to bother with a second engine, because I would not need it.
On day three of my new 795, I lost all my hydraulics just 2 miles off the marina, in serious naval traffic with ships, due to a malfunctioning pneumatic clamp. I had a working engine, but no control at all. I had the second engine, but knowing assistance nearby, I called the marina boat and they towed me to my place safely.
Anyway, there are regulations for similar boats in some countries which ask you not to go far more than 12 miles or so. I think some countries even require a second engine, if you plan to leave the harbour.
Yes, it is correct, the second engine requires important alterations, adds to weight, and is costly, and you may never need it, except for trolling.
My suggestion would be consider your operating environment and judge yourself.
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Post by lynnardm on Apr 2, 2022 0:21:10 GMT
I’m in the camp that a small backup engine is not necessary for safety. With today’s modern outboard engine reliability a main engine failure is unlikely. I’ve never been stranded due to engine failure. I have run out of gas with my current boat due to uncalibrated guages. That was in a marina area and another boater quickly came to my rescue with his dinghy :,) Seems like I hear more of electrical and hydraulic failures. Having an anchor and radio and phone ready are good enough for me. In my case I’m in the mostly protected waters of puget sound and the San Juan’s. If I was way out in the ocean I might feel different.
Capt’n Lynn
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