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2001 Johnson 90 vro problems?

A

Avanw88

New member
Hello I have a 2001 Johnson 90 that is giving me some issues. The previous owner eliminated the oil tank and went to premix. Ran pretty good last year would occasionally stumble getting on plane but that’s it. The problem got worse this year. I could feather the throttle and get it on plane and run 25-30 mph no problem, try and give it more and it falls on it’s face. Took to a mechanic who was certain it was the vro. Rebuilt all the carbs and new vro and now it runs even worse... I’ll try and post a video I took before taking it to the mechanic
 
Installing a new fuel pump as a guess has been done more than once.----And with no improvement.-----Perhaps talk to that mikanic.-------What other trouble shooting was done if any ?
 
faztbullet said:
Was carbs set properly? Was calibration pockets cleaned? Was sync and link set-up done properly?
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The only detail I got on the carb rebuild was he put new floats in, and another guy did them, which I was hoping meant good things. I will go over those things when I talk to him today, thanks!
 
racerone said:
Installing a new fuel pump as a guess has been done more than once.----And with no improvement.-----Perhaps talk to that mikanic.-------What other trouble shooting was done if any ?
Click to expand...

I think that’s part of the problem, pretty much no troubleshooting other than the video I showed him.
 
Avanw88 said:
The only detail I got on the carb rebuild was he put new floats in, and another guy did them, which I was hoping meant good things. I will go over those things when I talk to him today, thanks!
Click to expand...

Two "mechanics" working on a engine... and throwing parts at it on your dime? Yeah, I bet it came back worse!

You deserve a refund of the cost of the VRO and your old VRO re-installed.

Questions to ask: What were the compression PSI readings of all the individual cylinders? <-- First thing to do via the troubleshooting trail.

Second thing do test via troubleshooting --> With all spark plugs removed, using a spark tester whereas a air gap of 7/16" can be set for the spark to jump, the spark should be a strong blue lightning like flame... a real SNAP!. Ask if he did this test, and if so, what were the results in detail?

If these two tests were not performed first... one would not be able to determine the general condition of the engine in order to pinpoint whether the problem is due to internal powerhead failure, fuel problems, ignition, whatever.
 
joereeves said:
Two "mechanics" working on a engine... and throwing parts at it on your dime? Yeah, I bet it came back worse!

You deserve a refund of the cost of the VRO and your old VRO re-installed.

Questions to ask: What were the compression PSI readings of all the individual cylinders? <-- First thing to do via the troubleshooting trail.

Second thing do test via troubleshooting --> With all spark plugs removed, using a spark tester whereas a air gap of 7/16" can be set for the spark to jump, the spark should be a strong blue lightning like flame... a real SNAP!. Ask if he did this test, and if so, what were the results in detail?

If these two tests were not performed first... one would not be able to determine the general condition of the engine in order to pinpoint whether the problem is due to internal powerhead failure, fuel problems, ignition, whatever.
Click to expand...


I called him after getting it on the water last night letting him know it was running worse and he suggested changing the primer bulb. Happened to have one in the boat and changed it with no prevail. Called him back And he tells me it’s gotta be a bad VRO sometimes they’re bad from the factory. This is after him urging me to spend 500 dollars on the factory one...
 
Avanw88 said:
I called him after getting it on the water last night letting him know it was running worse and he suggested changing the primer bulb. Happened to have one in the boat and changed it with no prevail. Called him back And he tells me it’s gotta be a bad VRO sometimes they’re bad from the factory. This is after him urging me to spend 500 dollars on the factory one...
Click to expand...

If he went to the trouble to test the engine after repairs, he would have known that his guess work on replacing the VRO was useless and reinstalled your original VRO resulting in a refund or a cancellation of the bill. Personally I have a feeling you're headed to small claims court with this "mechanic".

You need a mechanic that knows how to trouble-shoot, that test runs the craft/engine to make sure he's found and cured the problem rather than to have you do the test runs.
 
Talked to the mechanic yesterday and he told me he did a compression check and spark test and that the carbs were thoroughly cleaned and set to factory settings. He thought it might be over oiling because the pre mix in the tank and the vro running together. Looked at it last night and the plugs didn’t seem bad, pumped up the prime ball and noticed gas spewing out from the top of one of the bottom carbs. I had it running on muffs and it seemed to over fuel itself, and eventually die, a couple times gas running out of the carbs.
 
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