Any known problems w/ 1993 Johnson 90HP?

[Dhadley]

Just make sure the set up is correct. Most hi-ring issues were related to motors set up in the mid to low 5K range. Thats also the range that coking happens quickest followed by broken rings. <br /><br />Where exactly is the crack in your 78?

 

[phatmanmike]

Re: Any known problems w/ 1993 Johnson 90HP?

those motors are no good. for propper disposal, please send motor to:<br />mike black<br />largo, fl 33770

 

[piniongear]

Any known problems w/ 1993 Johnson 90HP?

I finally got my 1978 Evinrude 140HP apart to discover a broken block at the rear exaust tube area. So, I have an instant boat anchor on my hands.<br /> I have a chance to replace it with a 1993 90HP Johnson engine. Does anyone know of any problems this year model had, such as the top piston ring being to close to the edge of the piston, as it was on '78 140's? That little item alone costs me a complete rebuild on the 140 only 49 hours(of operation) ago.<br /> I thank you all for any comments you may have regarding this engine, pro or con......piniongear

 

[piniongear]

Re: Any known problems w/ 1993 Johnson 90HP?

The 1978 140HP broke when removing the lower exhaust tube housing. The long bolts and the front four bolts came out OK, but the rear studs were stuck tight. The nuts came off easy but the leg would not drop. When it finally let go one stud stayed where it should in the upper block. The other stud decided to stay with the lower leg, and in doing so broke the block off in a chunk inside where the stud was threaded into the block.<br /> Could it be fixed? I suppose so, but it would require disassembly of the power head and some welding, redrilling and tapping and surfacing off the block face. Not worth the expense to me. Maybe I will part it out. The lower gearcase is good and so is the power tilt/trim. I bought a new motor for the trim unit before the broken block, so that sits here without a usefull purpose. <br /> Ah, such is life I guess!