Makes me glad i have a yanmar! No glo-plugs, no priming pump. Just starts. On Aug 11, 2015 2:28 PM, "John Irvin via CnC-List" <cnc-list@cnc-list.com> wrote:
> Sure glad I have an Atomic 4! > ------------------------------ > From: Josh Muckley via CnC-List <cnc-list@cnc-list.com> > Sent: 2015-08-11 12:27 PM > To: C&C List <cnc-list@cnc-list.com> > Cc: Josh Muckley <muckl...@gmail.com> > Subject: Re: Stus-List Universal Engine panel wiring > > I checked the specs of the universal glo-plugs and they average 2 ohms. > This equates to ~6amps times 4 cylinders equals ~24amps. That's a pretty > good amount of current draw. The way Maine Sailor makes it sound the panel > is the choke point and all the current for the glo-plugs AND starter > solenoid has to come from the panel and through various plug connectors and > relatively small gauge wire. Each adding it's own amount of additional > resistance. Not to mention poor connections, burnt contacts, and > corrosion. I'm not surprised at all to see the voltage dragged down enough > to prevent the starter solenoid from being able to close. > > Josh Muckley > S/V Sea Hawk > 1989 C&C 37+ > Solomons, MD > On Aug 11, 2015 11:41 AM, "Rick Brass via CnC-List" <cnc-list@cnc-list.com> > wrote: > >> In about 20 years of working on boats, mine and others’, the photo is the >> first Universal panel I have seen with an ammeter instead of a voltmeter on >> the panel. >> >> >> >> Of course the glow plugs will draw down the starting voltage. When you >> power the glow plugs you are running ten amps or so across a couple >> thousand ohms of resistance to create heat. If your battery is OK, and of >> normal capacity, the voltage loss to the system will be negligible – maybe >> 0.1v or less. But that happens any time you put a load on the system. >> Doesn’t the voltage shown on your battery monitor drop from around 12.6 to >> 12.4 or 12.5 when you turn on the lights in the cabin? Same thing. >> >> >> >> The only way that the glow plugs will cause a significant drop in the >> starting voltage is if you have a direct short in the wiring or a defective >> glow plug that is shorted to the engine block. Then you get a direct short >> from battery to ground through the engine panel wiring harness, and you let >> all the smoke out of the engine wiring harness. (Sorry, old electrical >> engineering joke coming back to haunt me.) Which is why there is a >> typically a 20 amp fuse in the power wire that supplies the engine panel. >> >> >> >> Putting a solenoid into the system so the button engages the solenoid and >> the solenoid powers the glow plugs really doesn’t accomplish anything. >> Unless you have the unlikely confluence of a short in the solenoid and a >> short in a glow plug, in which case you get a short direct from battery to >> ground and you let the smoke out of the whole boat. >> >> >> >> >> >> Rick Brass >> >> Washington, NC >> >> >> >> >> >> >> >> *From:* CnC-List [mailto:cnc-list-boun...@cnc-list.com] *On Behalf Of *Josh >> Muckley via CnC-List >> *Sent:* Tuesday, August 11, 2015 10:03 AM >> *To:* C&C List <cnc-list@cnc-list.com> >> *Cc:* Josh Muckley <muckl...@gmail.com> >> *Subject:* Re: Stus-List Universal Engine panel wiring >> >> >> >> I don't have a universal or any experience with one but it sounds to me >> like the glow plugs are drawing down the starting voltage. I would suggest >> installing a solenoid for the glow plugs in addition to a solenoid for the >> starter. The 2 articles below talk about poorly wired universal panels and >> make similar suggestions. >> >> http://www.pbase.com/mainecruising/universal_wiring_harness_upgrade >> >> http://www.pbase.com/mainecruising/solder_trouble_shooting >> >> Josh Muckley >> S/V Sea Hawk >> 1989 C&C 37+ >> Solomons, MD >> >> On Aug 11, 2015 8:50 AM, "Neil Gallagher via CnC-List" < >> cnc-list@cnc-list.com> wrote: >> >> The power to the starter button is supposed to come off the switched >> terminal of the glow plug button. You are supposed to to have to push the >> glow plug switch and the starter switch every time you start, as the glow >> plug switch also powers both the electric fuel pump until the oil pressure >> builds up, and silences the low oil pressure alarm. Once the oil pressure >> rises, its switch powers the fuel pump. >> >> I put an M30B in our club launch and it has the same setup. >> >> Neil Gallagher >> Weatherly, 35-1 >> Glen Cove, NY >> >> On 8/10/2015 11:15 PM, David Knecht via CnC-List wrote: >> >> Since I got my boat, I have been bothered by the fact that the engine >> will not start in the way it is described in the manual unless plugged into >> shore power. The manual says to hold the glow plug button for about 30 >> seconds and then while continuing to hold that button in, push the start >> button. When I do that, the starter does not turn over. If I release the >> glow plug button and push the start button the engine starts fine. My >> father (retired electrical engineer) and I (genetic engineer- useless in >> this case but sounds good) spent some time trying to diagnose the problem >> this weekend and found two interesting things: >> >> >> >> 1. The buttons both tested fine in terms of their switch function. We >> then tested power at the engine. There is a heavy red cable coming from >> the battery to the starter measured 12V. The red-yellow wire from the >> start button is attached to what I am presuming is the solenoid (the wiring >> diagram in the manual does not show a solenoid). We only measured 8 volts >> at the solenoid when the button is pushed, but 12 volts everywhere else. >> So that probably explains the fact that both the glow plugs and starter >> won’t work at the same time because we appear to be losing 4 volts in the >> solenoid. I will pull the starter next winter and have someone test it >> unless someone has an alternative suggestion. >> >> >> >> 2. The wiring diagram in the manual (Fig 2 on page 13) shows the power >> from the key switch coming into the glow plug button and then a wire from >> the other lead to the start button. The manual shows that wire running >> from the downstream side of the glow plug switch so that the start button >> should only be energized when the glow plug button is pushed (as the manual >> describes). If that were the case, the I would not be able to start the >> engine with only the start button. Nevertheless, it does start the >> engine. Tracing the wires, we found that the bridging wire actually came >> from the hot side of the glow plug switch, so that either button will work >> independently as both are always powered. What I don’t understand is why >> you would wire it the other way (as the manual shows) since that would >> remove the ability to start the engine without the glow plugs (as in an >> already warm engine). I don’t know if the PO or some yard mechanic made >> that change or if it is indicated wrong in the manual, so I am curious how >> other Universal panels are wired. The way it is actually wired makes more >> sense to me than what is in the manual unless I am missing something. >> >> >> >> Thanks- Dave >> >> >> >> Aries >> >> 1990 C&C 34+ >> >> New London, CT >> >> >> >> >> >> >> _______________________________________________ >> >> >> >> Email address: >> >> CnC-List@cnc-list.com >> >> To change your list preferences, including unsubscribing -- go to the bottom >> of page at: >> >> http://cnc-list.com/mailman/listinfo/cnc-list_cnc-list.com >> >> >> >> >> >> >> _______________________________________________ >> >> Email address: >> CnC-List@cnc-list.com >> To change your list preferences, including unsubscribing -- go to the >> bottom of page at: >> http://cnc-list.com/mailman/listinfo/cnc-list_cnc-list.com >> >> >> _______________________________________________ >> >> Email address: >> CnC-List@cnc-list.com >> To change your list preferences, including unsubscribing -- go to the >> bottom of page at: >> http://cnc-list.com/mailman/listinfo/cnc-list_cnc-list.com >> >> >> > _______________________________________________ > > Email address: > CnC-List@cnc-list.com > To change your list preferences, including unsubscribing -- go to the > bottom of page at: > http://cnc-list.com/mailman/listinfo/cnc-list_cnc-list.com > > >
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