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#1
IP: 104.249.229.37
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OPSS Switch question
Greetings - a couple questions as I upgrade to a electric fuel pump (working with the MM conversion kit)
1) the brass plug I need to remove to install the OPSS is giving me grief. Instead of fighting this any longer, I got a bright idea.....wondering if I can add the OPSS to the same outlet as the Oil Pressure sending unit. To avoid any extreme torque on that location, I would use a “AN” fitting, and remotely mound the sending unit and OPSS. Any reason this won’t work? 2) I am adding a fuel shutoff solenoid. Any reason I can’t power this off the coil “+” terminal ? Turn off the engine, solenoid closes. This is over and above the valve on top of the tank. As always, I value, and appreciate the input of this group. Cheers Jimmy
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Jimmy C&C 29 MK1 Erieau , Lake Erie |
#2
IP: 99.30.185.198
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Jimmy, I have made a similar change and it is perfectly acceptable. Mine is made up using AN fittings and stainless braid hose. In my case I'm feeding four units, the OPSS, two oil pressure gauges and a Cole Hersee low oil pressure alarm.
Tom |
#3
IP: 24.152.132.65
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1) That's how mine is, oil pressure actuated sender/switches mounted on a bulkhead, connected to the engine with 300psi oil rated hose. Be sure to run a ground wire to the sender array, the oil pressure gauge won't work without it.
2) Yes, you can power the solenoid shutoff from coil + with this advisement: to do it right, as you add load to the ignition circuit (this valve and the new electric fuel pump) you should measure the voltage at all components on the circuit. You don't want voltages lower than 3% of the source which for the engine circuit is the alternator. Voltage measurements below 3% indicate the entire ignition wiring circuit needs bigger wire. We have a voltage drop calculator on the USCG/ABYC Standards forum category.
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Neil 1977 Catalina 30 San Pedro, California prior boats 1987 Westsail 32, 1970 Catalina 22 Had my hands in a few others |
#4
IP: 104.249.229.37
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One more question...
Thanks for the feedback guys. Last piece to this mini refit, is to relocate the coil, on a bulkhead. Like the idea of cooler ‘smoother environment. In doing so, I will need to increase ( replace with longer )the length of the coil wire that runs between coil and distributer cap. Any pit falls?
Again, Tnx Cheers Jimmy
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Jimmy C&C 29 MK1 Erieau , Lake Erie |
#5
IP: 24.152.132.65
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No pit falls with coil relocation, rock on. It would be interesting to get some IR temp readings of the coil before and after relocation to compare.
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Neil 1977 Catalina 30 San Pedro, California prior boats 1987 Westsail 32, 1970 Catalina 22 Had my hands in a few others |
#6
IP: 104.249.229.37
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Future coil temp comparison
Thanks for the info.....
I will prep the A4 for a coil relocation, but not actually move it until after launch, around last week of April. I have a IR temp gun, so readings should be very accurate. Cheers Jimmy
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Jimmy C&C 29 MK1 Erieau , Lake Erie |
#7
IP: 24.152.132.65
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Great! Please mark a target on the coil so you are reading the same spot.
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Neil 1977 Catalina 30 San Pedro, California prior boats 1987 Westsail 32, 1970 Catalina 22 Had my hands in a few others |
The Following User Says Thank You to ndutton For This Useful Post: | ||
Dave Neptune (01-25-2018) |
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