Or, it would be, if you hadn't seen this video on basic troubleshooting when your outboards won't start. For the second time this year my 2009 optimax 225 dfi wouldn't start this morning (29 degrees).
I've had this issue since i bought the motor new a few years ago.
Boat won't start in cold. Engine won’t shift into gear. It is also possible the iac (even if oem) is defective (slight warpage/weak internal electrical connection) and it behaves differently when stone cold compared to warmed up. When it's cold outside, like getting into the 30's, i have to pull the string literally a hundred times before it starts, but it immediately dies.
Check out these 10 simple solutions for the most common engine breakdowns. Wait about 10 minutes and try starting again. Position throttle setting as follows:
Follow up troubleshooting  engine does not turn over; Engine will not start when cold If you have high humidity in your boat, this can cause excessive sweating, as well as quick ice buildup on the evaporator.
If the temperature warms up the motor starts fine. Again you do not have to worry about rebuilding or replace your carburetor altogether. Boat fires up beautifully when cold and runs without issue.
Boat engine is sputtering and losing power. Engine won’t start or turn over. (it won't start because there's no spark plugs) as you crank the engine, this will help the fogging oil to circulate through the cylinders.
Backed down the ramp.and vroom it started right up. As we all know, marine environments are humid. Motor will not roll fast enough to start when cold.
Once it starts and finally achieves idle, the boat will run like a champ all day. It use to take three or four tries, but this morning it was more like 7. Keep a dehumidfier running on the boat when its sitting at the dock.
The only way i can seem to get it to start is by using starting fluid or pouring gas down the carb. Basic trouble shooting when your outboard won't start. It is a little hard to cold start but once it starts all is well.
After that time (and it's almost like clockwork), it fires right up. These could effect cold starts before you start you might check the fuel bulb and make sure the system is full before turn the key the first turn of the key before the starter you should be able to hear the high pressure pump energize the pressure to the fuel rail that should take 5 seconds or thereabouts Boat won't start in cold.
The problem starts when a choke fails to close; This years has progressed to be even harder to start. Have a 1997 mercury 125 outboard.
Position throttle setting as follows: If it doesn’t start with a half dozen pulls, wait 10 minutes and try again. Try the starter fluid first, and if she catches (even for a short while), then your problem is fuel supply.
Hopefully we will get the oem/aftermarket question answered. Do not use the choke, open the throttle all the way and try starting again — it will usually take at least 2 to 3 pulls. Discussion starter · #1 · may 12, 2010.
What to do if your boat motor won't start? How cold to freeze a boat engine; Vibration from the engine prop.
Trim is stuck on the engine. Once done, reinsert the spark plugs. Boat won't start when warm from the 3.0 owners manual place control handle in neutral.
Step by step instruction for solving the most common boat engine starting problems. The engine never starts on the first pull despite the fuel bulb being primed. If your timing is too advanced your starter will try and turn the crank one way and combustion sequence is going the other way and it'll act like the starter and or battery doesn't have the cojones to crank it.
Pulled the boat out and plugged in the charger.charged it until charger indicated full charge. Engine turns over, but will not crank; However, in cold weather it’s worth checking the glow plugs:
Put in new 1250cca battery. And if it's warm, you have probably been recently charging the battery with the engine alternator. This causes a rich fuel mixture while the engine is cold.
How cold to freeze a boat engine; When you back down the ramp, turn the key, and nothing happens, it's a problem. Next put some paper towels over the spark plug holes and crank the engine over.
Yes.that sort of thing does happen from time to time. If you have a weak battery, you will find out when it is cold and the engine is cold. If she doesn't it's probably no spark.try the spark tester and see if you have spark.
Drew the battery way down trying to start it. Last two years its been hard to cold start after sitting for 1+ days.