@saltwaterallday It is on a 21' center console, whose brand name is Offshore. I really poorly made boat, but the lines are awesome....replaced everything in 1993, floors, stringers, transom. Still solid after all of these years. It is paid for , so no need to sell it.
video of boat running? it would be cool to see how it is running,fuel numbers,top speed etc, impressive work. i want to go look at a old bonito 26 with 2 of these engines on a gill bracket. i dont think the engines run so it will be interesting.
The idle speed should be around 650 +- 50 rpm in forward gear in the water.
Adjusting the idle speed this way has made a world of difference, the engine is running richer (may adjust idle air bleeds) and cold starts in 2-3 cranks.
It has never cold started this well in the 19 years I've owned it....
OK for these engines there are two screws near the flywheel, one that is on the end of what looks like a cigar (the one that in question) and another that is just a stop. The one that is just a stop is the WOT max advance stop screw, the other is the idle advance screw, which adjusts the speed as well.
Screw it in(clockwise) and the engine retards and slows down, unscrew it (counterclockwise) and the engine advances and speeds up. to be continued...
Update to all...will post a #5 video soon, but in the mean time a little update. It appears I have been adjusting the idle speed all wrong, by using the Idle STOP screw...by doing it that way I was cracking the butterflies slightly and effectively bypassing the idle air bleeds and running too lean at idle. Not sure if this is true for all Johnson/evinrudes or not, but is defintely true for 1987/1987 v6 engines.
The proper way to set idle speed is by the timing advance...continued on next post..
If you were to use a 50 Gallon test tank and start it up the cough/sputtering would be so much more pronounced as you would have some exhaust back-pressure and you could clearly see the cough through the exhaust ports and which side its coming from. I think some mild cough is normal in these big v6 and up motors.
@valdi9165 any idea where I could get one.. I need one that is over 30 inches long and slightly over 24" wide since I have those dolefins bolted onto the cavitation plate.
@cfauvel Get yourself one of those big plastic storage bins I think some walmarts sell them. If the fins are in the way unbolt them for clearance and reinstall when done. Make sure you have no air leaks, restrictions and the synchronization must be checked this is the ignition timing in relation to all the carb plates . The carb plates must all be closed at idle. Again check your timing with the motor loaded. Hope you got it fixed.
I just watched the complete series , and I am glad you could fix it, I have a 225 EFI outboard, but same principles apply, no matter if its electronic ignition, normally aspirated or not...
Thanks, I was glad too...now maybe this year I'll test it out on the water :-(...of course by now there will be something else wrong with it. Doe the EFi engines have O2 sensors like a car does to measure the mixture ratio?
never in my life worked on an outboard before, i stick to automotive. what exactly are gapless plugs?? sorry if it's obvious to you guys, i've never heard of them before.
gapless plugs are justt that, a plug whitout gap, the electrode sits in the center of the sparkplug, and spark jumps around the sparkplug, not to afixed point..so no gap here, much like a concentric ring
Ypu won't believe this, but with all kinds of kid centric stuff going on, I haven't even tested it on the water since fixed everything :-(....I will definitely post the video if and when I get out on the water...very sad.
Sounds good buddy....But remember, these engines are VERY SENSITIVE to back pressure, so the only true test of idle quality is actually running the boat in the water....But, generally speaking, if it isn't lean popping on the hose, it probably won't do it in the water....D
Don't know if you can see it, but I have one of those outboard mufflers that are supposed to provide some back pressure. Sure is much quieter.
A guy from TheMarineDoctor suggested I file down/true up the float bowls by getting a piece of glass and some 400 grit wet sandpaper and sand down my bows. Apparently they are notorious for being untrue and thus don't seal properly. If not sealing properly then you have vacuum leaks and runs like crap. 2 month ordeal!!
@wetbootsmoke Took it out this past weekend...ur right the engine wouldn't idle in the ocean set at the 1000rpm. Had to adjust the rpm out on the water to about 1200, on land that equated to something like 1400+...What a differnece...some threads speak of drilling the Idle Exhaust Relief holes larger to allow the pressure to escape there above the water line...
what type of boat is this on?
saltwaterallday 2 weeks ago
@saltwaterallday It is on a 21' center console, whose brand name is Offshore. I really poorly made boat, but the lines are awesome....replaced everything in 1993, floors, stringers, transom. Still solid after all of these years. It is paid for , so no need to sell it.
cfauvel 2 weeks ago
video of boat running? it would be cool to see how it is running,fuel numbers,top speed etc, impressive work. i want to go look at a old bonito 26 with 2 of these engines on a gill bracket. i dont think the engines run so it will be interesting.
saltwaterallday 3 days ago in playlist Boat repair
The idle speed should be around 650 +- 50 rpm in forward gear in the water.
Adjusting the idle speed this way has made a world of difference, the engine is running richer (may adjust idle air bleeds) and cold starts in 2-3 cranks.
It has never cold started this well in the 19 years I've owned it....
cfauvel 7 months ago
OK for these engines there are two screws near the flywheel, one that is on the end of what looks like a cigar (the one that in question) and another that is just a stop. The one that is just a stop is the WOT max advance stop screw, the other is the idle advance screw, which adjusts the speed as well.
Screw it in(clockwise) and the engine retards and slows down, unscrew it (counterclockwise) and the engine advances and speeds up. to be continued...
cfauvel 7 months ago
Update to all...will post a #5 video soon, but in the mean time a little update. It appears I have been adjusting the idle speed all wrong, by using the Idle STOP screw...by doing it that way I was cracking the butterflies slightly and effectively bypassing the idle air bleeds and running too lean at idle. Not sure if this is true for all Johnson/evinrudes or not, but is defintely true for 1987/1987 v6 engines.
The proper way to set idle speed is by the timing advance...continued on next post..
cfauvel 7 months ago
If you were to use a 50 Gallon test tank and start it up the cough/sputtering would be so much more pronounced as you would have some exhaust back-pressure and you could clearly see the cough through the exhaust ports and which side its coming from. I think some mild cough is normal in these big v6 and up motors.
valdi9165 1 year ago
@valdi9165 any idea where I could get one.. I need one that is over 30 inches long and slightly over 24" wide since I have those dolefins bolted onto the cavitation plate.
cfauvel 8 months ago
@cfauvel Get yourself one of those big plastic storage bins I think some walmarts sell them. If the fins are in the way unbolt them for clearance and reinstall when done. Make sure you have no air leaks, restrictions and the synchronization must be checked this is the ignition timing in relation to all the carb plates . The carb plates must all be closed at idle. Again check your timing with the motor loaded. Hope you got it fixed.
valdi9165 8 months ago
I just watched the complete series , and I am glad you could fix it, I have a 225 EFI outboard, but same principles apply, no matter if its electronic ignition, normally aspirated or not...
xxxavier63 2 years ago
Thanks, I was glad too...now maybe this year I'll test it out on the water :-(...of course by now there will be something else wrong with it. Doe the EFi engines have O2 sensors like a car does to measure the mixture ratio?
cfauvel 2 years ago
@cfauvel : no, no oxygen exhaust sensor, AFAIk, just throttle postion, flywheel speed and air/fuel mixture, unless is a 4 stroke
xxxavier63 2 years ago
never in my life worked on an outboard before, i stick to automotive. what exactly are gapless plugs?? sorry if it's obvious to you guys, i've never heard of them before.
meandmyevo 2 years ago
gapless plugs are justt that, a plug whitout gap, the electrode sits in the center of the sparkplug, and spark jumps around the sparkplug, not to afixed point..so no gap here, much like a concentric ring
xxxavier63 2 years ago
how about a video of it running on the water?
wrestling560 2 years ago
Ypu won't believe this, but with all kinds of kid centric stuff going on, I haven't even tested it on the water since fixed everything :-(....I will definitely post the video if and when I get out on the water...very sad.
cfauvel 2 years ago
Sounds good buddy....But remember, these engines are VERY SENSITIVE to back pressure, so the only true test of idle quality is actually running the boat in the water....But, generally speaking, if it isn't lean popping on the hose, it probably won't do it in the water....D
wetbootsmoke 2 years ago
Don't know if you can see it, but I have one of those outboard mufflers that are supposed to provide some back pressure. Sure is much quieter.
A guy from TheMarineDoctor suggested I file down/true up the float bowls by getting a piece of glass and some 400 grit wet sandpaper and sand down my bows. Apparently they are notorious for being untrue and thus don't seal properly. If not sealing properly then you have vacuum leaks and runs like crap. 2 month ordeal!!
cfauvel 2 years ago
@wetbootsmoke Took it out this past weekend...ur right the engine wouldn't idle in the ocean set at the 1000rpm. Had to adjust the rpm out on the water to about 1200, on land that equated to something like 1400+...What a differnece...some threads speak of drilling the Idle Exhaust Relief holes larger to allow the pressure to escape there above the water line...
cfauvel 8 months ago