Mercury Outboard Compression Test with Cold & Warm Engine | Different Results?? Find out

[saadaloogalways]

Firstly comment is my beautiful view and very amazing work pin me

[bradleymacblane]

I've been going MAD after having my motor rebuilt. It started running like crap, so I used a harbor freight pressure tester and also got 90 psi. I had blindly ignored the test and am pretty sure it's carburetor related now, but thank you for this video!!! The same thing must be happening to me and i can write off my worries as HFT junk!!!

[hapaboym]

great video, i had same results on my 200 efi and harbor freight gauge, going to return the harbor freight junk, thanks

[alistairshanks]

I am a mechanic and compression tests should always be done on a warm engine if possible and the throttle should always be wide open and the cranking should be the same for each cylinder. The main thing you are looking for is an even spread of results. The gauge difference is not good but they were both even spreads. You can have gauges calibrated but at the price, you paid it would not be worth it.

[hudsonbridges]

I have the same model engine but its a 200hp, so this was very helpful and well-made. Any chance you know where I can get replacement head bolts for this motor?

[BritishPakFamily]

lk 5 😎
wow great job dear
congratulations for mono

[freakazoid]

I have a 15hp 2 stroke Mercury. Both chambers are at 75psi. Is this ok? Test was done wot but the choke was in.

[khudztv]

When it comes to boat....you're the one

[chunlimon]

I have the same engine, do you have the spark plug gap info? Thx

[coastalcleaningandmaintena]

Pep boys im from canada do they just sell tools or do they do repairs as well. Cause it looks like shady business going on there. It would even run if it was 90

[mrsensable]

If motor has aluminum heads test cold!! Removing plugs when hot can damage threads!! Ask any good mechanic!

[coastalcleaningandmaintena]

Wide open throttle is for 4 strokes my man.

[vladimir-Strelovich]

Привет интересный обзор Огромный лайк 👍✊

[elliottstanaway]

Super nice video . I would think of something I hope you would do then bam ya did it multiple times👌

[DustinKeating-ykvq]

Harbor freight compression gauge is trash i will never use one

[philbarrows]

So we have proved Harbor Freight calibration tools are the worst

[ricksnowden]

115 to 120 on these motors is great. Harbor freight garbage.

[coastalcleaningandmaintena]

Barely alive my friend. 90 is terrible

[dereksuperstrong]

How do you know the harbor freight one wasn’t giving you the right rating and that Pep Boys was not giving you the wrong rating just because the pet boy one was giving you a stronger rating does not mean it was more accurate

[dereksuperstrong]

If your hose wasn’t so long you would not have to spend it over so many times to get the 90 pounds shorten your hose I hear your battery starting to lose towards the end of your test