Boat Motor Won't Start? Why It Happens & What To Do

Jun. 17 2023 News By Mellissa F.

Engine problems are the fastest way to spoil a boating excursion. Fortunately, there may be a simple explanation for why your boat motor won't start as well as a simple solution to the problem. Here is a guide to understanding the common causes and solutions when your boat motor won't start.

Safety Features Engaged

It is simple to forget to deactivate the safety mechanisms that restrict your boat from starting up while enjoying the thrill of traveling over the sea. Most contemporary boats come with an ignition interrupt switch or safety lanyard that must be always linked while the boat is operating.

Your boat engine may crank but not fire or fail to kick over if the safety lanyard has disengaged for any reason. Make sure the ignition interrupt switch is turned "on" if your boat has one.

Starting Sequence Errors

Even experienced boaters occasionally make mistakes. Verify that you are starting your boat in the proper order before disassembling your marine engine. Depending on the sort of engine you have, you might need to choke the motor by turning the ignition key or removing the manual choke lever from the engine. Your boat could need a bit more choke than normal to start in chilly weather.

Take a moment to go over your boat's documentation if you recently bought it or if it has been long since you were last on the water to be sure you are following the proper pre-ignition routine.

Boat Not in Neutral

Before starting the engine, many boats require to be in neutral. The motor won't start if your boat is in gear, but the lights and instruments will still function. Check that the gearshift lever is firmly in the neutral position, halfway between forward and reverse.

Dead or Disconnected Battery

Your boat battery might be low if your starting engages yet the motor cranks extremely slowly. The battery can be dead if the engine won't even start. Utilize a voltmeter to measure the voltage of your batteries, then fully charge them at a voltage of around 12.6 volts. You might need to acquire a new battery if the old one won't charge or won't retain a charge.

Make sure the battery switch or, if your boat has two batteries, is set to "on" or "both" before attempting to start it. While a battery switch is a great feature to reduce battery drain, if you fail to turn it back, it might also be why your boat motor won't start.

Examine the battery cables if your boat motor still won't start after you've charged the batteries and checked the battery switch. Check to see if there are any loose or rusted connections between the engine and the battery. Any broken or severed battery wires should be reconnected or replaced.

Engine Not Primed

Starting the boat before properly priming the engine is another common starter problem. You need to turn the key to the "on" position and wait until the engine starts up, depending on the type and year of your boat. Check to see whether gasoline is flowing to the engine and that the primer is not broken if your boat motor still won't start after letting its prime.

If your boat has an electronic primer, remove one of the fuel lines that link the primer to the carburetor or engine intake to make sure gasoline is flowing properly. While you wait to see whether petrol comes out, ask a friend or family member to turn the key in the ignition to prime the engine. Remember to use a cup or bucket to catch the fuel from spilling.

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