boat won't start in cold
Present Boat- 2018 VR5 45200hp Mercruiser. When fishing it is easy for someone to mistakenly bump into the throttle and move it out of neutral.
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The safety lanyard has become disconnected.
. As the engine warms up the valves expand and dont seat as well causing a loss of compression. When you back down the ramp turn the key and nothing happens its a problem. If you have a multimeter set it in DC to 20V and check the voltage it should read 126 volts or more.
When it cools down it will start again. Boat fires up beautifully when cold and runs without issue. After skiing for a bit and shutting it down it wont start until I raise the engine cover and let it sit for 3-5 minutes.
The fuel tanks air vent is closed. A cold engine is a lot harder to spin than a warm engine. Ad Talk to a Boat Mechanic Now for Help w Maintenance Troubleshooting and Repair.
The ultimate issue is that the throttle is not in neutral. If you have run through this checklist and your engine still wont start you may have either blockages to your exhaust or your engine may be lacking compression. When you shut off engine once hot check to see if you continue to see fuel dripping down throat you shouldnt.
And if its warm you have probably been recently charging the battery with the engine alternator. By putting the throttle in neutral you will be able to turn the key and hear the engine start. Your boats fuel tank is empty or nearly empty.
Believe it or not these are indeed some of the most common reasons why a boat engine wont start. Last Boat- 1998 Capri 1950CL 30 Mercruiser. If you have a weak battery you will find out when it is cold and the engine is cold.
Check The Battery Condition. Of course any leaking injector overnight will fill the cylinder with fuel and make it extra richand difficult to start cold since there is rich fuel already being added to all cylinders during a cold start. Dont get stuck at the boat ramp - fix your outboards fast with these basic troubleshooting tips.
Before you go insulate the fuel lines and the fuel pump if possible when youre there prop the cover up with something when taking a break and it should help. Of course were barely scratching the surface of what can go. Ethanol on a hot day is likely the problem.
A valve job is needed. If the batteries are the cause the boat engine will try to start up and eventually fail. 2 Open throttle 100 then close it to the start position on the handle I tried it more than the start position at times too 3 Pull the rope 2-4 times 4 Open the choke so I do not flood the thing 5 Pull the rope 6-7 more times 6 Remove the motor cover 7 Give it a nano second of starting fluid with lube in it.
Or it would be if you hadnt seen this video on basic troubleshooting when your outboards wont start. Since these issues may require a more resources and experience than the average boater has we recommend taking the boat in to a certified mechanic at this point to help troubleshoot the issue. After that time and its almost like clockwork it fires right up.
As long as the engine is running it usually keeps running. The battery is the device that starts your boat and if the battery is dead discharged it will not send the required power to the starter and it wont start the engine. When you say it wont crank I will assume that it would not spin.
Four stroke engines that start up when cold but wont when hot usually have valve problems.
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