need help with 1987 johnson 200

[awdgraybird]

i have a 87 johnson 200 and you get it on the water in nuetral it revs and runs great but in gear going forward it misses and runs bad so far i have checked spark while going with a timing light and it looks good also tried spraying a pre mix in each carb and it did nothing it has a new vro pump and i went through and cleaned all six carbs.the compression is between 85-92 on all cylinders most are 90 any help would be great thanx

 

[awdgraybird]

Re: need help with 1987 johnson 200

any body have any ideas what it could be really need to get this thing running right thanx

 

[dehydrated]

Re: need help with 1987 johnson 200

timer base move freely? when accelerating does it get on plane right away ? also what does your spark plugs look like? they usually will show the story

 

[cdn-pk]

Re: need help with 1987 johnson 200

If spark seems good and all spark plugs are firing (i.e good burn)

1) ensure carbs are clean, i'd do a carb kit on all carbs
2) Do a link and sync following the OEM manual (you do have an OEM manual...?)

once your sure the valve are synchronized and your timing is good and being advanced with the throttle. water test it again and post your results here.

 

[awdgraybird]

Re: need help with 1987 johnson 200

plugs were black i hav put new in though and they look ok and have already done carb kits in all carbs. i have a factory manual and will do link and sync following it and post my results

 

[dehydrated]

Re: need help with 1987 johnson 200

Were all the plugs black and oily? might be a little rich do you have mains jets 62d also i would suggest getting a spark tester at auto zone test each cylinder set the gap at 7/16 and turn it over should see bright blue spark .

 

[awdgraybird]

Re: need help with 1987 johnson 200

i have a spark tester and checked all and had a bright blue spark the high speed jets that came in it are a 74d jet and i dont know if that is what i should be running i am in utah so the elavation is around 4200 feet and ya they were all black and oily

 

[dehydrated]

Re: need help with 1987 johnson 200

74 d might be too rich for 4200ft try 72d at least on the top 4 cylinders for sure elevation kills makes them run like a pig

 

[awdgraybird]

Re: need help with 1987 johnson 200

ok i put new jets in it and synced the carbs took it out on the water and it is hard starting in the water sometimes.it ran good going forward at low range then mid range acted like it was missing then full throttle once you get going if you back it of slightly it runs beautiful now i am going to pull the carbs and adjust the floats it is getting to much and dripping out but other than that are there any suggestions to try thanx in advance

 

[metriccrescentwrench]

Re: need help with 1987 johnson 200

i am going to pull the carbs and adjust the floats it is getting to much and dripping out

The floats must be correct for it to run right, if they're off it'll really mess you up.

Also, what do you mean by "dripping out"? Can you see fuel spitting out the front of the carbs when it's running or what? The reason that's significant is that if you can see fuel spitting out like that (sometimes you can only see it after dark with a timing light acting as a strobe) it's a pretty good indication there are issues with the reeds.

 

[awdgraybird]

Re: need help with 1987 johnson 200

ok i put new fuel lines on it and primer bulb adjusted the floats and now it has good mid range and top end but now it wont idle and is hard stating once it has been started. When first in the water it fires right up but then after a min of running it dies and will only start with the warm up lever all the way up and is still hard to start even at that thanx

 

[dehydrated]

Re: need help with 1987 johnson 200

what are the rpms at idle in gear? should be 750 or so if not adjust idle timing should be 6 degrees

 

[awdgraybird]

Re: need help with 1987 johnson 200

they are around 700-750 in gear when it will idle most the time it wont it seems to idle ok when you first run it but once you run it around the lake it wont idle or start unless you pull up the warm up lever