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    350 mag mpi surging under load

    Hello..I have a 350 mag mpi (MY2009) alpha one serial number 1A348183. The engine idles very smooth and with steady 550rpms but as soon as I got the boat on plane and want to keep about 3000rpm , it surges from 2900-3100. If I slow down to about 2800rpm , it surges from 2600 to 2800 and it might...
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    Engine temp sensor or sender?

    Hello. My engine (350 mag mpi 2009) has both engine temp sensor (805218T) and engine temp sender (806490T).Can you please tell me which part gives the ecu the engine temp and which to the smartcraft gauge? My engine is running rich and probably the ecu had incorrect information about the engine...
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    350 mag mpi running rich and starting issue

    Hello. My engine is a 2009 350 mag mpi (s/N 1A348183) with about 400 operation hours..Last year I had the known problem of corroded risers and water entered to the starboard side of the engine. I pull off the engine and it did not crank. Finally the 2 cylinders had rust and the engine did not...
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    350Mag mpi pre-ignition??

    Hello, i am running a 350Mag MPI (s/n 1A348183) with 360hours. The engine operated perfect since last summer that a little overheating problems occured. After that, some issues of rough operation at idle when the engine started every day occured and the same time the starter hardly was cranking...
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    Trim limit switch issue Alpha One GenII

    Hello, in the last 5days i have a problem with my limit switch, I changed this year both power trim sender and limit switch and till now they both work fine. Five days ago, while the trim position sender works still fine, i can not raise the drive using the up botton but only using the trailer...
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    350 Mag MPI Engine key sensor fault

    Hello, during the last 15 days i have a problem with my water pressure sensor, which i have not change it yet. Now, I have another one fault to the smartcraft screen that sais "key engine sensor fault.restart the engine and if the fault persist,see the dealer". I noticed that this fault appears...
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    Possible water pressure fault(MY2009 350MAG MPI)

    Hello, i repowered my boat in 2009 with a totally new 350Mag MPI. Well, everything till now is just perfect with the new engine and i had no problem till yesterday. Everything run ok , cruising with 32Mph but as i scrolled the smartcraft screens, i saw that the water pressure was VERY LOW at...
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    350Mag Mpi (2009) Exhaust riser and manifold change

    Hello, i own a Wellcraft nova spyder with a new 350Mag Mpi (MY2009) and i was wondering if anybody can inform me every how many years should i change the exhaust risers for not having problems. I had similar problems with my old engine and i do not want to have the same with new. Thank you very...
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    Smartcraft power trim gauge not read correct

    Hello, i own a Wellcraft nova spyder 202 with a new 350Mag Mpi (2009) with smartcraft gauges. The last 10days the trim gauge does not read correct. I put a new trim sensor on my Alpha one drive when i repowered my boat 1,5years before. The trim limit works fine. But the trim reading is not...
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    SS prop looses the polish after 5min into the water.

    Hello to everyone,... there is something i want to ask you a long time ago... I use SS at my boat for at least 15 years, and i have changed at least 4 differenet models of SS props. All of them were Mercury. Every year i polish the propeller before i put the boat in to the water but as soon as i...
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    Hitting 60mph@gps with aluminium prop?....no way!!

    Hello again,... after the first 50hrs of operation of my new 350mag mpi (cat), i still use the 19p aluminium prop. The boat hits 56-58mph@gps and the engine reaches 4900-5050rpm depending load. AM i crazy that i am trying to hit 60mph with aluminium prop?:D :) :rolleyes:? With this prop, the...
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    1992 350 LX 4bbl vs 2009 350MAG MPI torqe question

    Hello, to everyone. i was wondering the following... My old engine (1992) 350lx 4bbl with 260 crank hp@4600rpm. This means with simple calculations that the engine torque was 397Nm@4600 (at crank). My new engine 2009 350Mag Mpi has 300 prop hp@5200 , so lets say about 330 crank hp@5200 which...
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    LPG at 350mag mpi?

    Hello, do you know if this convertion can happen on a boat?I do not believe that there is any specific danger for me,my boat or my engine if i use lpg. The petrol here in Greece now costs about 7,1$/gallon (1,5 euro/litre) and the LPG only 3,05$/gallon. It is a little bit expensive. So i just...
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    Low engine power during break-in period?

    Hello, is there a possibility the ecu of a new sterndrive engine (ex 350mag mpi 2009) to control (set a limit) the power of the engine during break-in period, just for protection? I am asking just because my brand new 350mag has a lot of power during acceleration (boat on plane), MUCH stronger...
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    Why my trim limit sensor needs again and again adjustment?

    I have a problem with my trim limit sensor. I calibrate it according the manual and i fit the screw very tight, but something go wrong and in the water it looses the adjustment. So the drive , keep raising with the up button. This happened 2 times. I calibrated it, i tested it several time up...
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    Smartcraft Break-In period Screen

    Hello to everyone... As i was reading the Smartcraft SC1000 speedo-tacho manual, i found that there is a screen at tacho shows the break-in period time remaining which is turned off as soon as this period complete.My engine AND the SC1000 are brand new.To be honest I do not remember that screen...
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    Alpha one genII Trim cylinder end cap and bearing carrier anode

    Hello, my boat has the 1992 alpha one genII drive, serial No: 0D873113. As fas i can remember it had never trim cylinder anodes. I bought the Quicksilver aluminium anode set and it had the trim cylinder anodes with the screw. I tried to put them onto the cylinder end cap but i could not screw...
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    350 mag mpi first test ride........

    Well, today the weather was just perfect so i decided to take my boat for the first test.After a small adventure as the tire of the trailer was ruined as i drove...I put it in the water, and i was waiting until the temperature come in working level.I then accelerate so to plane the boat. But...
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    350 mag mpi fuel injectors.

    Hello, could you please tell me how many cc/min are the fuel injectors of 2009 350mag mpi? Thank you very much.
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    Smartcraft oil temp reading

    Hello , as you have probably have read at my other post i have repower my boat with a new 350 MAG MPI. If the weather in Greece will be ok the next week i will put the boat in the sea for testing. Everything till now seems to work properly and also the smartcraft gauge. The only problem that i...
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