How To Compression Test an Outboard Motor {TIGHTEN UP TUESDAY}
2021 ж. 1 Ақп.
35 171 Рет қаралды
How To Compression Test an Outboard Motor {TIGHTEN UP TUESDAY}
Welcome back to Tighten Up Tuesday! This is a straight up step by step instruction video of how to do a compression test on an outboard motor. This is a mujst do when buying a used boat or outboard motor of any kind. If the compression is good and the motor runs good without any other noises (knocks especially). Then it is most likely sound. Leave a comment below if you thought this was helpful.
As always thanks for watching and Please SUBSCRIBE if you want to see more.
#compressioncheck
#outboardcheck
#buyingboats
#compressiontester
#compressiontest
Great information. I did this when I bought my 25hp Johnson years ago. A Buddy is looking at bigger motor for his boat and wanted to refresh myself. This is easy enough like you said if you can get to the plugs easy it’s definitely worth doing. Great insurance. Great clear cut instructions 👍
Awesome! Thanks for watching
Amazing video, simple and clear expenation. Best on the net. Thanks from greece
Awesome 🙏 thx
Good video straight to the point thanks for the info.
Thanks and appreciate the comment!
Great video for anyone checking out their motor! Keep up the good work Bill.
Thanks man! Pretty soon it will be solid fishing videos. lol
Great clip man, good clips and great info 👍
Thx man!
great video man keep it up
Thanks, will do!
That was very informative brother. Great content
Thanks buddy!
Thanks man. Easy video
Thanks for watching!
Hi from Australia, nformative vid, none of us want to break down on the water, home maintenance can make all the difference. 👍
Thanks for watching ! So awesome! Appreciate the support from down under!
Good video n explanation. I was taught to warm up the motor first and ground out the spark plug ends prior to testing. True?
I usually pull the kill switch which shuts off ignition. I have tried both open throttle as well as closed and it's virtually the same on 2 stroke engines. 4 stroke yes open throttles
Let me see. Hmmm Ahhh, the top spark plug wire goes on the top cylinder, wow that was easy. Also and this is a big also. --> the reason you trip your kill switch on a boat with a CDI ignition and even some electronic ignitions is so you do not burn out your ignition. If you remove your spark plugs and the voltage that would normally go through that spark plug has no place to go it can easily burn out your ignition. It is not enough for that plug to just be in the cap, it has to be in the cap and grounded to metal on the engine.
Thanks for watching
Lol
know its an older vid but suggestion is to also open the throttle to full. Allows full airflow and gives a more true reading.
Yep 100 percent correct
I've tried that process but it didn't make any difference...that's just not true....I do this daily...been a mechanic for 40+ yrs now...I challenge you to prove it....
Thanks for your videos. What happen to the Micro-Anchor Power-Pole follow up video? Do you still recommend the Micro-Anchor for the Gheenoe's? What has been your experience with it so far? Please advise. Thank you.
Funny you say that. I have it filmed and getting ready to edit it. Yes I recommend it bigtime. We have not had any issues at all with it. We did lose the nut to mount it in the water but that is because my buddy dropped it and it bounced into the drink. Lol. Thanks for watching and subscribing!!
@@JackedUpFishing Thank you. I am considering getting one for my Gheenoe LT-25. I have read mixed reviews on it. I am also considering a Power-Pole Sportsman II 8' for the Gheenoe. The New 2021 Micro-Anchor version 2 is out of stock until June but the sportsman is available. Do you think the Sportsman's 2 its an overkill?
Awesome! So clear. Is it necessary to run water through the lower leg to lubricate the impeller?
Not doing a compression check.
clean 2005! Owner must really maintain and care for it! lol...
😂 😂😂😂
For a 50 hp Yamaha 2 stroke 2005 should the psi be around 110 to 130 psi also?
I am honestly not sure. You can google it and find it for sure. I know you want no more than 10-15% difference between cylinders. Hope that helps. Tight Lines!
A saw the No.3 as just uunder 110 both times. Have a closer look?
Motor still running years later
If the seller won’t let you, don’t buy it
That’s right!!!
@@JackedUpFishing my 150 Johnson 2000 year has 150 on every cylinder. It's got 500 hrs run time.
@@JeffreyRust-oq7rw perfect!
I have a 1984 Evinrude 50HP reeding 121 on both. I am guessing I am in the good?
Yeah I love them engines they are hard to kill
HI, what is the name of the device to measure the pressure of the boat that you used please to look for it in amaozon
It’s called a compression tester, I got mine at autozone for $35.
Torque those spark plugs with a breaker bar.🤣 I love older stuff because of how simple it is. I bought a HF compression tester just because it was so cheap and noticed what you said. What brand is the one you're using? I didn't catch it. I'm guessing you're happy with it.
Lol I’ve seen people crank them down waaaay too much. Mine was a autozone special bought on a whim. Seems good I’ve had it for few years now.
@@JackedUpFishing oh yea I've came across quite a few like that. So surprised it didn't rip the threads out of the heads. Thats good to know. One guy I usto deal with used the same one and was happy as well.
Where did you buy your compression gauge and what is the brand?
You can get them online or autozone also Has them
💪👍
😂
Looking at a boat this weekend. Does the motor have to be warm or can it be cold? Also does the throttle have the be wide open? Ive had different mechanics say Wide open throttle and others say it doesn't matter and engine can be cold
Cold is fine on 2 strokes, but with 4 strokes I would do it cold and then warm just to see if there is any variation.
@@JackedUpFishing gotcha thanks.
@@JackedUpFishing does wide open throottle make a difference on a 2 stroke ? The one im going to be testing has a 93 Evinrude 40hp with console steer. Can i just remove plugs then cold test the cylinders without being Wide open throttle? I will be doing a compression test before we lake test it
@@shooter3288 yep 2 stroke fine to pull plugs and test cold. Make sure there isn’t over 10 percent difference between the 2 cylinders. That’s a strong engine too. I have had many of them
@@JackedUpFishing gotcha thats good to hear that those are strong motors. Amd ive never tested with throttle wide open on a compression compression lol
how do you shut off the gas line to the engine? or we don't need to do this.
You can just unplug the fitting. But you do not have to.
thanks, also I notice you didn't push the throttle to fully open. should we open the throttle to let more air into it during testing?@@JackedUpFishing
A mi me dijo alguien que hay que lubricar con un poquito de aceite antes de medir la compresión eso es correcto?
No.
Is the motor supposed to be hot or cold for a compression test? Does it matter?
Either works, but if you can do it hot it’s prob better. The main thing is that each cylinder is within no more than 10 percent of each other
@@JackedUpFishing awesome. Thanks for the quick response!
@@KZ-wk4xb no prob!
Wow! I noticed a few things I would never do in this video...... Never run an Outboard without water, the water pump requires water as lubrication. If you run an Outboard without water connected you will be destroying the impeller. Next you must bring the motor up to operating temperature to get an accurate reading. 2 stroke, 4 stroke doesn't matter ALL engines need to be at operating temperature! If this dude would warm the motor up first he would get completely different readings!
Actually I have tested that theory and numbers were in fact not that different. And another thing, I never ran the motor. You can turn the engine over either way starter without hurting your impeller. I work on engines and I can 100 percent tell you this is common practice on a 2 stroke.
Apparently you're not a mechanic
@@Showmethefish doesn't take much brains to be a mechanic......
the last one was under 110
It was a little higher, and the others if you are getting technical were around 115ish so compression was perfect
Dead!
😂