Mercury Outboard Spark Plug Replacement | 20HP 4-Stroke Spark Plug Change
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- เผยแพร่เมื่อ 14 ส.ค. 2018
- Get your Mercury outboard spark plugs here: bit.ly/mercury-spark-plug
See how to change the spark plugs in a Mercury 20HP 4-stroke outboard in this video from Boats.net. This is a simple procedure that is an important element of your Mercury outboard maintenance. We’ll start by removing the cowling on the motor, which will reveal the spark plug wires. When changing the spark plugs on a 20HP Mercury four stroke, it’s crucial that you keep the correct plug wires running to each of the two spark plugs. To make sure, we’ll remove the plug wire and replace one plug at a time.
The Mercury outboard spark plug socket size is a 5/8ths inch socket, and when you thread in and tighten the new spark plugs they should be torqued to 15 foot-pounds. You should check or change the spark plugs on your Mercury outboard every 500 hours of run time. If the tips of the plugs are black, the engine is running too rich and may be getting too much fuel. If the tips are white, your engine may be starved for fuel.
VIDEO HIGHLIGHTS:
Removing the cowling - 1:00
Replacing the spark plugs - 1:15
Find Mercury 20 HP outboard parts here:
www.boats.net/catalog/mercury...
In the video we’re working with a 2016 Mercury 20HP 4-stroke outboard motor, but you may have similar steps for your Mercury outboard. If you’re not sure whether these steps apply to your motor, leave a comment and we’ll get back to you. - ยานยนต์และพาหนะ
Thank you, i just bought a 20 HP 4 stroke Tohatsu and you are the only one showing a spark plug change,
did not address plug gap ???
do you use never seize on spark plug threads ? or silicone grease on the boots?
It seems to me an important part of changing spark plugs is ensuring/checking the correct gap, before putting them in. If the gap set from the factory is incorrect, or one of them has taken a knock, you could end up running worse than with your old plugs.
Regarding the plug wires, while the wires are different lengths so it makes it somewhat obvious which is which the reality is the engine has single coil so runs a wasted spark set up for a twin, so which lead goes where would make no difference on this motor.
hello . 1 where and how many anodes does the 2016 20 hp 4 stroke have? ... 2 what is the wash screw on the lower unit for? ... 3 every few hours or time the engine belt is changed.?? . thanks if you could answer .......
If it is not too much trouble, can someone please direct me to a place for help on my 1967 thunderbolt 200 20 hp. compression 59
thank you
What do work spark plug in mercury marine outboard motor
I have a 2010 four stroke 25hp Mercury. 2 plugs or 3?
If you took off both plug wires at the same time how would you know what plug goes to what wire without trying to start it. Mercury 4 stroke 15to 2006
one plug wire is shorter than the other..the long wire goes to the bottom plug..
Hi sir
Can t find the right spark plug socket for a 2006 15 h. power 4 strokes.
All the regular sockets just don t fit,,
Can you help me?
Thanks
Mario
most plugs use 5/8 socket are you using a socket made for plugs? regular deep sockets might not fit the spark plug
2006 15hp four stroke. Bottom plug is black, sooty. Top plug is fine. What caused this? Thanks
could be too much oil or not tilting engine up once in a while so oil isn't laying behind bottom piston sneaking past rings
Wow. Looks just like a Tohatsu, because it is.
SILENCE!
Is this disel engine
Diesel engines do not have spark plugs...
Lmao!!!!😂😂😂😂😂😂
Video title is for 20 hp 4 stroke. Engine is 2 stroke. Maybe confusing to the novice. Maybe do the demo on a 4 stroke or change the title of the video. Just a thought.
It says right on the back of engine cover four stroke...