200 johnson ocean runner no power over 2500 rpm's

[robalo520]

folks, my 2000 - 200hp ocean runner idles great also runs great on low, but when i try to speed up it stalls and bogs out....

i had a so called reputable mechanic and he replaced stator, power pack, ignition coils, spark plugs ignition, wire harness, water fuel seperator and trigger.

has anyone delt with this before? please give me some advice, i have spent over $2500 in parts....

 

[daselbee]

Re: 200 johnson ocean runner no power over 2500 rpm's

Ouch. Lesson learned regarding throwing parts at a problem.

Sounds like the "mechanic" concentrated on spark as the problem. It could be a few other things tho.
Let's disregard the ignition for now, cause YOU NOW HAVE ALL NEW IGNITION PARTS!!!! Geezx....

Look at these items:

Dirty HS jets in the carbs. SLOW mode from overheat (unlikely but possible). Low compression on one or more cylinders.
Very badly adjusted link and sync.

1. Do a compression test and post the numbers back. 1 thru 6.
2. Pull the brass drain plug from the bottom of each carb bowl, and remove the HS jet. Should pristine clean and clear. Any sign of gunk, gumming, etc, and it is likely that the HS fuel circuits in the carbs are clogged.
3. Using a digital temp thermometer, record the temp of the cyl heads when it fails to get up and go. Should be 140 degrees or so, and if it is significantly higher, possible that SLOW has kicked in. (But unlikely as I said above). Should be checked tho.

Link and sync....very involved stepwise setting of the linkages. One thing to double check is the pickup point where the throttle roller hits the throttle cam. There is an embossed line on the cam that is supposed to line up with the roller. Double check that to make sure it is positioned right.

Here is something you can try, that is free and you can't screw anything up. That throttle roller is not supposed to be touching the cam when at idle. If it is very very close (.005) or touching, you can TEST by loosening the screw that provides for adjustment of that roller, and moving the roller AWAY from the cam to a distance of about .040". This is for TEST!!!! If it picks up and runs, then your link and sync is off, or your engine may just require a bit more advance to get it up to WOT from idle.
If no change, put it back where it was. Eyeballing it is close enough.

Post back the results of these tests which can be easily done at home.

Where are you located? I need work!!! (Joke).

 

[archcycle]

Re: 200 johnson ocean runner no power over 2500 rpm's

Good lord $2500.. Have you done a compression test?

 

[robalo520]

Re: 200 johnson ocean runner no power over 2500 rpm's

Ouch. Lesson learned regarding throwing parts at a problem.

Sounds like the "mechanic" concentrated on spark as the problem. It could be a few other things tho.
Let's disregard the ignition for now, cause YOU NOW HAVE ALL NEW IGNITION PARTS!!!! Geezx....

Look at these items:

Dirty HS jets in the carbs. SLOW mode from overheat (unlikely but possible). Low compression on one or more cylinders.
Very badly adjusted link and sync.

1. Do a compression test and post the numbers back. 1 thru 6.
2. Pull the brass drain plug from the bottom of each carb bowl, and remove the HS jet. Should pristine clean and clear. Any sign of gunk, gumming, etc, and it is likely that the HS fuel circuits in the carbs are clogged.
3. Using a digital temp thermometer, record the temp of the cyl heads when it fails to get up and go. Should be 140 degrees or so, and if it is significantly higher, possible that SLOW has kicked in. (But unlikely as I said above). Should be checked tho.

Link and sync....very involved stepwise setting of the linkages. One thing to double check is the pickup point where the throttle roller hits the throttle cam. There is an embossed line on the cam that is supposed to line up with the roller. Double check that to make sure it is positioned right.

Here is something you can try, that is free and you can't screw anything up. That throttle roller is not supposed to be touching the cam when at idle. If it is very very close (.005) or touching, you can TEST by loosening the screw that provides for adjustment of that roller, and moving the roller AWAY from the cam to a distance of about .040". This is for TEST!!!! If it picks up and runs, then your link and sync is off, or your engine may just require a bit more advance to get it up to WOT from idle.
If no change, put it back where it was. Eyeballing it is close enough.

Post back the results of these tests which can be easily done at home.

Where are you located? I need work!!! (Joke).

i will try, and i forgot to mention it has brand new carbs on it, it was a new block that was installed thats why i am dumb founded, i used to rebuild my old evinrudes on my robalo and never had any issues, i just bought a new home and figured that a mechanic would build it right since i did not have the time at that moment... i f@%ked up choosing this guy and i just started researching today as now i will do my own work from this point on

 

[ReelPlumber]

Re: 200 johnson ocean runner no power over 2500 rpm's

Robalo520,

Curious as to what you find out. Let us know.

Is the primer bulb staying hard or is it sucking in when trying to speed up? May be a fuel delivery issue like clogged pick up screen in the tank, or bad primer bulb, E10 eating at the fuel lines or inside of the fuel tank.

 

[robalo520]

Re: 200 johnson ocean runner no power over 2500 rpm's

folks,
i tried adjusting the throttle roller, and tested it i got a little more rpm's but over 2500 it would bog down.... i also checked primer ball and it was fine. i am going to get a second opinion an old friend who is semi retired only works on his own boat at this time, and see what he can find out?? any other suggestions? i am leaning towards the link and sync..