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#1
IP: 70.54.31.229
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Trouble starting engine - valve open?
I am troubleshooting an engine that won't start. I have a brand new battery that's fully charged so I'm moving on to gas delivery. At the top of my gas tank I see a valve. Should it be open or closed?
See attached photo Thank you Last edited by wetbirks; 07-03-2021 at 10:02 AM. |
#2
IP: 32.211.28.40
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That's a 1/4 turn plug valve for shutting off the fuel. I'd guess that yours is in the OFF position.
Those valves are prone to corrosion, making them hard to turn. But make them too loose and they leak air into the fuel line (yours is at the top of the syphon). My choice would be a stainless ball valve. Connect to the tank fitting with a nipple. Other side goes to your fuel line, with either a barb fitting or a longer nipple with the threads cut off one end (doesn't chew up the hose like a barbed fitting). |
#3
IP: 162.219.70.239
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Open to run engine, closed otherwise.
In the closed position it prevents fuel from siphoning out of the tank if a leak develops somewhere in the system. Valve is mandated by CG I believe. Peter Al beat me to it |
#4
IP: 32.211.28.40
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Peter,
You snooze, you lose. Tell us about your avatar??? |
#5
IP: 162.219.70.239
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That is a picture taken on a dead calm day in about 10 feet of water just off Mason’s Island in Mahone Bay, Nova Scotia. Incredible how clear the water was and how calm it was.
Better wake up! Peter |
#6
IP: 70.54.31.229
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Thank you all for your help so far. I opened that valve but the fuel is not running down the line. I know this because I opened the valve and then unscrew the hose clamp and looked inside and there is no fuel running and the line with dry.
Is there a pump that draws a fuel into the engine? |
#7
IP: 134.41.132.177
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Take a pic of the engine on the side where the carb is. A manual pump will be right behind the carb. An electric pump, depending on type, could be located in the same position or on a bulkhead close by. Pics will help. The guys are correct as well, that valve is closed. You likely won't see fuel unless you have a pump to pull it. Ensure on joints are closed well with clamps so it doesn't suck air.
Next, is this boat new to you. If so will want to know when it was last started, when that gas in tank was put in there, if it was treated with stabilizer. Bad gas is always a concern on engines that haven't been started in a while. When the engine is turning over ensure the choke is working. Fuel Fire Compression. All should be checked if this is a new to you engine or hasn't been fired up in a while. Hope that helps, but we have to remember there sometimes a combination of things that cause an engine not to start. More info on the engine would be nice such as the last time it was running, if it has fire at the plugs and compression.
__________________
Mo "Odyssey" 1976 C&C 30 MKI The pessimist complains about the wind. The optimist expects it to change. The realist adjusts the sails. ...Sir William Arthur Ward. |
#8
IP: 134.41.132.177
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Pretty common to look down at the bottom in 18 feet of water around here when its been calm for a little while. I'm off to Bra Dor Lakes in a few weeks...should be a good run. I"ve got over 600 nm on so far this season and expect to rack up another 600 on that trip alone.
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Mo "Odyssey" 1976 C&C 30 MKI The pessimist complains about the wind. The optimist expects it to change. The realist adjusts the sails. ...Sir William Arthur Ward. |
#9
IP: 47.142.136.235
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That valve will have to be open so fuel can get to the engine.
The raw water cooling valve should be closed when cranking a no start engine. A fully charged battery does not guarantee that you have spark. Have you confirmed that you have spark? Have you tried shooting starting fluid into the carburetor while cranking the engine? We will be able to help further if you could supply details. The first step is to figure out if the no start is due to a problem with fuel, spark or compression since all three are needed for the engine to start. ex TRUE GRIT |
#10
IP: 99.237.234.117
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Quote:
Hi John, where might I find my raw water cooling valve? |
#11
IP: 174.77.161.253
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Look at the REAR (StarBoard) side of your engine and locate the WATER PUMP.
(See PIC #1) Follow the hose attached to it to where it connects to a THRU HULL. (See PIC #2) Your valve may look a little different but basically you're looking for something with a valve attached to the hull. (More reading on this HERE) That valve feeds your cooling system and is commonly referred to as the Raw Water Cooling Valve. On that note, Forum Crew... We should maybe re-think how we refer to closing that "valve" for clarity to newbies? Just a thought.
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-Jerry 'Lone Ranger' 1978 RANGER 30 |
#12
IP: 99.237.234.117
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"That valve feeds your cooling system and is commonly referred to as the Raw Water Cooling Valve."
Thank you for helping me locate that valve. I will turn it off when I try to start the engine again. At what point would I reopen it? |
#13
IP: 174.77.161.253
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Quote:
That circled area (choke arm) is indeed what John was referring to. In the below pics you can see how is is supposed to be attached.
__________________
-Jerry 'Lone Ranger' 1978 RANGER 30 |
The Following User Says Thank You to roadnsky For This Useful Post: | ||
TimBSmith (07-17-2021) |
#14
IP: 70.54.31.229
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Quote:
Located the wrong water cooling valve. It was in the off position already. |
#15
IP: 99.237.234.117
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After doing a few things mentioned in this form, I'm convinced that my next step is to figure out an issue with fuel delivery. The manual fuel pump makes a continuous squeaky noise that doesn't seem to be drawing fuel into the engine. When I remove the clamps and pull the fuel lines in various locations between the tank and the fuel pump, the lines are all dry. So I am certain that there is no fuel passing through the fuel lines.
I added 20 L of fuel last week. Any suggestions on my next steps to troubleshoot this? Please recall that I did run the fuel tank empty prior to adding the new fuel. |
#16
IP: 47.142.136.235
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The inner wire for the choke is not connected to the dohicky on the choke; it appears to be resting on the part itself. The engine will not start unless it is choked, especially when cold.
To review: To start the engine needs fuel, spark, compression in the cylinders. Also the choke must be working and the spark needs to be at the right time (timing). The raw cooling water intake valve in located on the hull of the boat at the other end of the water pump inlet hose. When you crank the engine the water pump is turning and pumping water. Exhaust pressure will blow this water out when the engine is running. When the engine isn't running water can accumulate in the exhaust system and flood back into the engine if the engine is no start cranked for to long of a period of time. A BELATED WELCOME TO THE FORUM. We'll get your engine running. Hang in there. ex TRUE GRIT Edit: Jerry beat me to it with some excellent pictures Last edited by JOHN COOKSON; 07-03-2021 at 10:31 AM. |
#17
IP: 99.237.234.117
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[QUOTE=JOHN COOKSON;126028]The inner wire for the choke is not connected to the dohicky on the choke; it appears to be resting on the part itself. The engine will not start unless it is choked, especially when cold.
Is this what you're referring to? I'm heading down to the boat in about an hour and I will give it a closer inspection to make sure it is attached. Thank you for the warm welcome! I so much appreciate the help I received. |
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