Start up or blow up engine quiz #advice
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flicka20_selected_risks
Hello fellow Flicka Owners,
I am embarking on the grand project of installing a 1gm10 in Selected Risks. My first task is to figure out the wiring and electrical, and I was wondering if any of you guys familiar with this engine might be able to help me solve a few mysteries. The wiring diagram in the manual isn't very clear, so I made my own. Please see the attached. The question marks show where I'm most confused:) 1,2,3,4,9 - I think these are for another Yanmar model??? 5 & 6 - I have no clue what these wires would be for on the ignition 7 & 8 - Does it make sense that 7 joins the push start button, and 8 goes directly to the battery positive? 10 - My alternator doesn't seem to have this wire. Do you know what it is? Also please let me know if I've made any mistakes with the wiring system. I'm trying to figure this out without employing an electrician so that I can know the engine for myself in case I need to make running repairs. Any advice or pointers will be most welcome. 
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gabriel warren
Ahoy Selected Risks owner— I have the 1GM10, and another complete spare (that kind of dropped into my lap) since they no longer make them and the boats were constructed to accept that, and only that, model. I had my engine out for a major rebuild (the reason for the spare) and put it back in, but I just carefully labeled all the wires, etc., so I didn’t have to run the analysis as you are. Even at that, I am ahead of vast numbers of accomplished skippers out there who know only one thing about their engine: you turn the key and it goes ‘thunk-thunk’. But I can’t confidently answer your questions.
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My point is that you might get lucky with Flicka skippers, but 1GM10’s were put in numerous other hulls, so you could be limiting your wisdom pool. In your shoes, I would call around to boatyards who are authorized Yanmar service centers (like the one who did my rebuild) and see if I could pick their brains a bit. Now is probably not the best time of year in the northern hemisphere since they are flat out for commissioning. Good luck. If you have been running on an outboard, it is a whole new world having a decent electrical budget and adequate range. (With the 12 gal tank, I calculated that I can motor day and night for a week, not that I intend to do so.) Gabriel Koremikre hull 275
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Jim Hooker
First thing, the black line shown to the starter is not connected
to the solenoid as shown in your drawing. Connected there it will
short out the battery when the start button is pressed. The black
wire connects to the body of the starter by a mounting bolt. The
connection that you have the black wire to is the power into the
windings of the starter motor. When the white wire to the starter
is energized by pressing the start button (connecting 7 and 8
sending battery voltage to the starter solenoid) the coil in the
solenoid engages the starter gear to the flywheel and closing
heavy contacts to provide large current to the starter motor from
the red wire. The black wire is the ground and is connected to the
engine or starter body mounting bolt. More will follow On 5/1/2022 2:01 AM,
flicka20_selected_risks via groups.io wrote:
Hello fellow Flicka Owners, |
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Morris London
Good Morning Selected Risks,
I am an outboard sailor, and don't know almost anything about diesels (yet), but I do see what I think is one glaring error on your schematic. You show the heavy black wire going from negative on the battery to the engine block to the alternator and to the
starter. The lug you have it shown to on the starter, actually the starter relay, is the one that connects the battery positive to the starter motor. This is not unique to diesels, it's the same on all gas motor starters too, so I'm confident in at least
this comment. If you do it that way, when you turn the key you will put a direct short across the battery. This will at a minimum burn up some wires, possibly the starter relay, and in the worst case cause extreme damage to the battery and possibly (though
relatively unlikely) a battery explosion.
The starter is grounded to the engine via its mounting, no ground wire needed. The alternator may or may not be the same, which is to say it may or may not need a ground wire. Yes, you do need a ground wire between the battery negative and the engine block.
The 3 connections on the starter relay are:
#3 is provided by the large copper strap shown between the relay and the motor. If the image is close to what you have on your motor, that's how it works, and no wire is required there at all.
Keep going with your research. As you say, it's much better and safer to know your engine inside out, just like all systems on your boat.
Fair winds,
Golden Crown (#242) -- Morris London
From: Flicka20@groups.io <Flicka20@groups.io> on behalf of flicka20_selected_risks via groups.io <leon666ink@...>
Sent: Sunday, May 1, 2022 2:01 AM To: Flicka20@groups.io <Flicka20@groups.io> Subject: [Flicka20] Start up or blow up engine quiz #advice Hello fellow Flicka Owners,
I am embarking on the grand project of installing a 1gm10 in Selected Risks. My first task is to figure out the wiring and electrical, and I was wondering if any of you guys familiar with this engine might be able to help me solve a few mysteries. The wiring diagram in the manual isn't very clear, so I made my own. Please see the attached. The question marks show where I'm most confused:) 1,2,3,4,9 - I think these are for another Yanmar model??? 5 & 6 - I have no clue what these wires would be for on the ignition 7 & 8 - Does it make sense that 7 joins the push start button, and 8 goes directly to the battery positive? 10 - My alternator doesn't seem to have this wire. Do you know what it is? Also please let me know if I've made any mistakes with the wiring system. I'm trying to figure this out without employing an electrician so that I can know the engine for myself in case I need to make running repairs. Any advice or pointers will be most welcome. |
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Jim Hooker
Sorry for the interruption, Church. I have attached a revised for
Flicka version of the Yanmar wiring diagram. Looking at your
photo I am assuming the top item on the panel is the key switch,
the middle the buzzer and the bottom the starter push button. The
white wire from the starter push button comes from the switched
side of the key switch, and the other (7) ties back to the white
wire to the starter. This activates the starter solenoid. Somebody
added a bit (8) for some unknown reason perhaps to operate a
charge relay to open it while starting. 2 & 3 should be for the Tachometer which it appears you don't have. And 9 is the tachometer connection at the panel. 4 would connect to the sail drive seal sensor (not applicable) and 1 should be the indicator light ground which should connect back to the engine block somewhere, for instance where you show the black wire on the alternator (or anywhere else on the engine or ground buss) 5 & 6 most likely are accessories which are key switched but
not related to engine operation. Please feel free to contact me with any engine/wiring questions.
I can also deal with phone calls or text, contact me directly for
number. Jim Hooker (jahooker@...) sv Niamh (#278) Detroit On 5/1/2022 2:01 AM,
flicka20_selected_risks via groups.io wrote:
Hello fellow Flicka Owners, 
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