JOHNSON 200

[mel-j]

I have a johnson 200 91 model with low compression around 65 on all cylinders it has steel sleeves in it.Can i get away with reringing it?

 

[JB]

Re: JOHNSON 200

Howdy, Mel. Your numbers don't sound right.<br /><br />1. 65psi is very low and would indicate a damaged cylinder in a 10 year old engine,<br /><br />Except<br /><br />2. all six cylinders measure the same.<br /><br />Redo your compression test. Use a screw-in style guage and warm the engine if possible before the test. Turn the engine over at least 5 times while measuring for each cylinder. If you cannot warm the engine, be sure that the cylinder walls are not dry.<br /><br />If you cannot produce over 90psi cold or 100psi warm, all cylinders within 15 psi of one another you have a problem.<br /><br />Recheck and let us know the results, plus any recent events such as overheat or oil pump failure that could have contributed to your odd measurements.<br /><br />Red sky at night. . .<br />JB

 

[mel-j]

Re: JOHNSON 200

the 200 johnson i have has beeh sitting up a year so the cylinders are probley dry.i cant run it because it doesnt have any spark.i bought the boat like it was hoping it would run .i pulled the head off after the compression check and the cylinders look great.i used a screw in type guage.HELP !!

 

[almost retired again]

Re: JOHNSON 200

Hi Mel;<br />I don't think that I would worry so much about the compression until I solved the firing problem, in the meantime you could squirt a little OMC engine tunner in each cyl. while you are working on the fireing problem. It could be that the rings are stuck in the piston groves, and this might un-stick them. Try unplugging the big red cannon plug from the control box (this will be under the hood)by doing this you have elimited the key switch. Of course you will have to use a remote start switch to check for spark now.<br />HOPE THIS HELPS

 

[JB]

Re: JOHNSON 200

Hi, Mel. Lubricate your cylinders (WD-40 does well) and retry.<br /><br />Red sky at night. . .<br />JB

 

[mel-j]

Re: JOHNSON 200

CAN YOU TELL ME WHAT THE STANDRED BORE SIZE ON A 91 JOHNSON 200GT IS?I WOULD LIKE TO CHECK THE CYLINDERS BEFORE I GO TO FAR IF THERE WORE OUT IT IS PROBELY NOT WORTH FIXING THIS MOTOR IS ON A STRATOSV 201.ALSO CAN YOU TELL ME THE BEST PLACE TO GET RINGS BEARINGS GASKETS REASONABLE.THERE WAS QUIT ABIT OF SLOP IN THE PISTON TO CYLINDER BUT I AM NOT SURE IF IT IS THE RINGS OR CYLINDER THIS IS THE FIRST TIME IT HAS BEEN APART. THANKS FOR ALL YOUR HELP.TOM

 

[almost retired again]

Re: JOHNSON 200

mEL I'm not sure , BUT I'll let you know tomorrow after I go back to work. That is unless someone else hasn't replied to your post in the meantime.

 

[G DANE]

Re: JOHNSON 200

Hi Mel<br /><br />There is slop between pistons and cylinder walls on outboards. Theese pistons gets really hot and expand a lot. Dont worry about that. I experienced the same on a motor which apeared to be in perfect shape - it is not like automobile engines. Lubricate rings a lot with WD 40, get the heads on again and retry. Later you can decarb it to loosen rings up.

 

[mel-j]

Re: JOHNSON 200

I pulled the heads off the motor it all looked fine I am going to put new rings in it anyway while it is apoart.I still dont have any spark do you have any ideas?thanks for all your help .Where can I get the parts to put it back together reasonable?

 

[DJ]

Re: JOHNSON 200

Mel,<br /><br />The no spark issue could be as simple as making sure the "dead man" switch is working correctly on the control box.<br /><br />Do the simple things first. Could also have a blown fuse under the cowl. Check every connection. Pull them all apart and clean if necessary.

 

[almost retired again]

Re: JOHNSON 200

Hi MEl;<br />Well as promised here is the bore size, 3.685" is standard, the ring end gap is from .019 to .031" I hope this information helps, but I would do what a lot of the folks on this board have recommended. Put the heads back on, solve the firing problem first. With no fire on any cyl. it's more than likely something that's common to all cyl.s. Unplug the big red plug under the hood then jumper the battery red terminal on the starter solenoid and the yellow red terminal on the starter solenoid (if you don't have a remote start switch) While doing this check for spark. Once that you have spark, crank that engine up, but you will have to plug the big red plug back in to kill it. If all this works it will sure beat tearing the whole thing down just to add rings. Let us know how it comes out.

 

[mel-j]

Re: JOHNSON 200

to almost retired.when i pulled the heads off i had to pull one of the pistons out because it had a cracked skirt.i checked the ring gap and it was .022.i am going to replace the piston with new one.should i replace all the rings or not?I can pull the pistons out witout spliting the case i went through the reed plate holes and took the cap off the rod.can i try to get it to fire without putting the heads back on.while it is down i really hate not to replace all the rinds.THANKS SO MUCH FOR YOUR HELP.

 

[mel-j]

Re: JOHNSON 200

CAN YOU TELL ME WHAT PROP WOULD BE BEST FOR THIS MOTOR 91 200 JOHNSON ON A STRATOS 201.

 

[Capn Mike]

Re: JOHNSON 200

I run a 200 johnson on a 23' WA (about 3800 lbs fully loaded), and use a 15.5 X 15. Would think you can go to Michigan props 19 or 22 pitch.

 

[almost retired again]

Re: JOHNSON 200

Hello again Mel;<br />I know that you can remove a piston the way that you did, however I would never try to put one back that way. The rod caps are fractured during production, no two fractures are the same,and each rod and cap must perfectly be aligned when re-installing. This is something that I belive is almost impossible without splitting the crank case.I have only known two people that tried to do a rebuild in this fasion, one of them had a rod thru the crank case in less than 50 hrs, of operation the other I didn't hear from again. If it wasn't critical for rod cap alignment OMC wouldn't have made a special tool for it. I don't say that you must use this tool, but you must be very careful with rod cap alignment. Well I'll get off the soapbox now, hope this helps<br />Good Luck

 

[Dhadley]

Re: JOHNSON 200

Mel -<br />Almost is right on. Besides it's going to be really hard (next to impossible) to get the assembly clean again after it's honed.<br /><br />BTW - how did you know it had a cracked skirt by just removing the head? Just wondering.<br /><br />Good luck!

 

[mel-j]

Re: JOHNSON 200

I found out the skirt was cracked because pisto looked like it had been beat to death from the backside i used a flaslight to look through the reed plate holes.I pulled the piston out and it was cracked and a piece broke off but i cant find the piece.Ill split the case for reassembly.I orded a new piston and rings.Still working on the spark problem.I checked the ring gap in that cylinder that was bad and it was .022 in 4 places through the cyl.

 

[mel-j]

Re: JOHNSON 200

LOOKING FOR A POWER PACK FOR A JOHNSON 200 91 MODEL.CAN ANYONE TELL ME HOW TO TEST ONE TO SEE IF IT IS GOOD OR BAD?

 

[mel-j]

Re: JOHNSON 200

can anyone tell me what they mean when they say v-6 looper and v-6 crossflow?