Engine dies under a load

[Crosbyman]

close to 37,000 feedbacks should not be ignored

All cylinders have 72 psi

very odd....did you or not try another compression meter or pull the head to look inside. gaskets are cheap and you have no other options.

btw ... "Hello have a 1984 Johnson 150 V6" is this a new to you engine ??
with untested compression or successful trial run ?

 

[cyclops222]

I would think ignition is O K. Especially at such low compression pressures.

 

[Paradise pontoon]

Gee, sounds like the carbs. Put a flusher on the motor and give it a shot of 50::1 down the carb throats. Crank it up, choke closed and see if she runs a bit. If so, the carbs likely need cleaning.

Carbs are rebuilt

 

[Paradise pontoon]

I would think ignition is O K. Especially at such low compression pressures.

I check on this year model it says it’s within specs on compression

 

[Paradise pontoon]

close to 37,000 feedbacks should not be ignored

very odd....did you or not try another compression meter or pull the head to look inside. gaskets are cheap and you have no other options.

btw ... "Hello have a 1984 Johnson 150 V6" is this a new to you engine ??
with untested compression or successful trial run ?

 

[Paradise pontoon]

Might be compression? We ran it until good and warm compression dropped to 65 all cylinders

 

[racerone]

On my compression tester a good one of those shows 120 PSI all day long.----You have a bad gauge , bad test procedure or your motor is JUNK !!!----In what manual did you read that 72 PSI is factory spec.----Just plain nonsense to me.

 

[havoc_squad]

To the OP, if you reject the advice from experienced members here that know these outboards extremely well, they will not endlessly entertain your questions about things of no value asked in this topic if you don't follow their advice fully as they walk you through diagnosing.

Like ignoring advice of removal of heads for photos on forum to inspect cylinders and asking for help afterwards of why it doesn't work conveys an uncooperative mindset unless you can really back up your reason with hard to dispute proof that rules out that step(s) suggested are not needed.

 

[cyclops222]

A word about D I Y mechanics. ME
I rebuilt a simple Evinrude carburetor 3 times !! In 1 hour. Because I FORGOT to install 1 gasket under the large main jet in the center of the carburetor bowel.
I only found the problem because I rebuild anything on a large clean white Beach Towel !!! I found 2 identical gaskets. 1 was used. DDUUUGGHH

I am old and wise enough to realize I am not.........

 

[Crosbyman]

stuff happens when you work with one eye missing

 

[Paradise pontoon]

Update on engine. Running great runs 68 mph . FYI none of the info on here was the problem. New primer bulb and hose assembly was bad. The plastic inside the hose was restricted hose
Thanks for the advice
Glad I didn’t call motor junk!

 

[Crosbyman]

Happy ending... thanks for feedback but....doesn't explain compression #s ????

happy ending nonetheless

 

[Paradise pontoon]

Happy ending... thanks for feedback but....doesn't explain compression #s ????

happy ending nonetheless

Bets me. I used two different gauges on test read the same. Pull heads off looked ok By any means it’s not new no more.

 

[Paradise pontoon]

Oh and the book specs reason I found it saying in spec because this sn# has low compression throttle bodies on it. You can install on some other sn# has well. Just FYI

 

[Dubed]

Update on engine. Running great runs 68 mph . FYI none of the info on here was the problem. New primer bulb and hose assembly was bad. The plastic inside the hose was restricted hose
Thanks for the advice
Glad I didn’t call motor junk!

Hmmm. That was replaced in post #1.
I guess new doesn't always mean good

 

[saltchuckmatt]

Going to get my chest waders on....it's neck deep in here.

 

[Paradise pontoon]

Going to get my chest waders on....it's neck deep in here.

And why’s that?

 

[Paradise pontoon]

Hmmm. That was replaced in post #1.
I guess new doesn't always mean good

Nothing made like it use to be.

 

[Paradise pontoon]

And why’s that?

EVINRUDE OEM LOW COMPRESSION CYL HEAD

KIT, 149 CU. IN. ON LY | 0389489


Part #: 0389489 Plus you could get carb intake throats at a time. This motor has both on it!!!