2000 Johnson 90 Blew Up - Advice?

[Loco-Coco]

Hello,

Not new to outboards or to forums, but I'm a new member here.


Long-story short, my 2000 Johnson 90 (V4 2-stroke) blew a hole right through the block. There are large chunks of aluminum scattered under the cowl. Not a pretty sight.

Anyway, a new block (empty block only, nothing with it) is $3900 at the stealership so rebuilding there is out of the question. I haven't found any powerheads for sale online so I'm wondering how reasonable it would be to try and replace it.

Am I best off trying to rebuild it? Or buy another used one and part this one out?

What others years and sizes would be compatible? I did some searching but didn't find much info.



Thanks very much,


Chris

 

[tnduc]

Re: 2000 Johnson 90 Blew Up - Advice?

You should be able to find a very good, used Johnson/Evinrude 90HP for $3900.

 

[tx1961whaler]

Re: 2000 Johnson 90 Blew Up - Advice?

Rebuilt power head $2299 here at iBoats.....
Was it a FICHT or carb'ed motor?

 

[Loco-Coco]

Re: 2000 Johnson 90 Blew Up - Advice?

Rebuilt power head $2299 here at iBoats.....
Was it a FICHT or carb'ed motor?

It's carbed. What's included in that rebuilt powerhead? US dollars I would imagine? Unfortunately I think it would come out to well over $3K to get it to my door in Canada.

Thanks for the tips, guys.

LC.

 

[mikesea]

Re: 2000 Johnson 90 Blew Up - Advice?

And most rebuild companies want a good core.If yours is blown apart through cast ,its not going to acceptable as a core.Depending on the site of the blow out,it might be weldable,but the rebuild guys wont deal with it.You might know someone local that can do it.But Id look for a used motor or powerhead.Be sure to figure out WHY it blew,especially if you reuse carbs.The rebuilds require you to reuse all electrical and carbs.If you blew due to a dirty carb or electrical component ,you dont want to have it happen again.Usually all rebuilds will get carbs rebuilt too,along with fuel testing for water and new filters

 

[bob johnson]

Re: 2000 Johnson 90 Blew Up - Advice?

I saw an ebay ad for a rebuilt 60 degree motor.( which is what you r motor probably is as well...it was a little older though mid to late 90's..

but i think he only wanted about $2K....already rebuilt!!!!...no trade in!!!

i have seen complete motors that are rebuilt with zero hours selling for about $3-4K all the time.....

good luck


what caused your issue???????

what were the symptoms prior to it coming apart??

bob

 

[Loco-Coco]

Re: 2000 Johnson 90 Blew Up - Advice?

At this point I'm really not sure what caused it. The motor started up, idled and ran perfect up until it went. I was somewhere near 3/4 throttle and it began sounding like a marble in a shaken can. I slowed it down and when doing so heard a bang and it stopped. There's aluminum on one of the spark plugs (upper-port side) - the other three are clean.

Any idea how I could tell if the oiling system failed?



Also, I found a local guy with a powerhead from a '98 115. He's confident it'll bolt right up and will need no retrofitting at all (meaning my 90 carbs and electrical will work as well). He's offered it for $1000 undressed and will buy my old holy one for $100. He also said he'd do the swap for $200 if there are no surprises, though I'd probablly do it myself.

Is he correct about the '98 115 bolting up?



Thanks again,


LC.

 

[ezeke]

Re: 2000 Johnson 90 Blew Up - Advice?

If the oiling system failed the damage would not be limited to one cylinder/piston.

Which cylinder blew out?

 

[bob johnson]

Re: 2000 Johnson 90 Blew Up - Advice?

my guess is if the motor is a 60 degree looper( i dont know when they stopped making the 90 degree crossflows...right about that time frame maybe)....

then it should fit ....

the $1000 power stands on its own as far as a good deal or not...you got to look at its condition, check its compression.. and spark and if it runs in the right temperature range...

other wise the $200 install is a SWEET deal I think...

Id run to have someone swap out a power head for only $200 in labor!!!!!!!!!!!!!!!!!!!!

if he guarantees the motor running good with good compression good idel good temperature and goot WOT

then it is a very good deal for you!!!

bob

 

[Loco-Coco]

Re: 2000 Johnson 90 Blew Up - Advice?

If the oiling system failed the damage would not be limited to one cylinder/piston.

Which cylinder blew out?

The upper left (port) cylinder blew.

I'll check out the other cylinders when/if I take it apart. Regardless, if I fix it I'll be converting it to premix. That was the plan all along with this motor, but I actually just bought it two weeks ago so hadn't gotten around to it.

my guess is if the motor is a 60 degree looper( i dont know when they stopped making the 90 degree crossflows...right about that time frame maybe)....

then it should fit ....

the $1000 power stands on its own as far as a good deal or not...you got to look at its condition, check its compression.. and spark and if it runs in the right temperature range...

other wise the $200 install is a SWEET deal I think...

Id run to have someone swap out a power head for only $200 in labor!!!!!!!!!!!!!!!!!!!!

if he guarantees the motor running good with good compression good idel good temperature and goot WOT

then it is a very good deal for you!!!

bob

Before purchasing it I could actually see it run, and would follow up with a compression test.

The $200 labour to me also sounded like a good deal, however, this guy isn't a mechanic by trade. He said it's just a hobby and he likes to tinker with motors, mostly in the winter. That said, he could be excellent, but he could also be terrible. I would basically be dropping off my boat & motor at a complete stranger's house and pay him to tear it apart. That would be my only concern.


For now I'm not going to rush into anything. The plan may be to pick up another boat to get back on the water and take my time fixing this one.


LC.

 

[tashasdaddy]

Re: 2000 Johnson 90 Blew Up - Advice?

pull the cylinder head on the bad side and have a look.

 

[bob johnson]

Re: 2000 Johnson 90 Blew Up - Advice?

The upper left (port) cylinder blew.

I'll check out the other cylinders when/if I take it apart. Regardless, if I fix it I'll be converting it to premix. That was the plan all along with this motor, but I actually just bought it two weeks ago so hadn't gotten around to it.

LC.

you wont be fixing that motor!!!!!!!!!!!!!!!!!!!!!!!!

you can go do some pathological exploration in your spare time...thats all good...but with aluminum sprayed all over inside your cowl and a hole in the block..it is done....

you are starting over with something else I am sure...

Id love to get involved in a thread about the major reasons for engine failure!!

from reading here the last year it seems like bad carbs preventing oil mixed gas from getting into the system and lubricating the motor is one of the top reasons.

then maybe over heating...

Id love to hear about how you could diagnose one fuel starved cylinder before damage starts to occur on motors with more than 2 cylinders!!!!

bob

 

[Loco-Coco]

Re: 2000 Johnson 90 Blew Up - Advice?

you wont be fixing that motor!!!!!!!!!!!!!!!!!!!!!!!!

you can go do some pathological exploration in your spare time...thats all good...but with aluminum sprayed all over inside your cowl and a hole in the block..it is done....

you are starting over with something else I am sure...

I guess I didn't explain myself properly. By "fix it" I meant fixing this outboard motor by replacing the entire powerhead. At no time did I consider it a possibility of repairing this particular block. I picked out a few pieces of aluminum with one the size of a stack of 5 quarters. Unless I can just silicone the hole... using the high-temp stuff of course.





LC.

 

[mikesea]

Re: 2000 Johnson 90 Blew Up - Advice?

Loco,the $1000 sounds like a good deal,whats the deal with the gys motor?? did he blow a gearcase ,or ?? how did he come to decide and sell a powerhead from a complete eng .if it is complete.That said,if its a good engine complete,might be easier to trade him yours for his.Alot less hassle,especially if his engine is a good clean runner

 

[1946Zephyr]

Re: 2000 Johnson 90 Blew Up - Advice?

Another good option, is to check out some of these salvage yards and see if you could find a good used one. A motor that age should still have relatively low hours on it and a used one could be a good candidate for bringing yours back to life. I would of course get compression readings before you buy one and what happened to the motor, before it went to the salvage yard.

 

[jonesg]

Re: 2000 Johnson 90 Blew Up - Advice?

Rattling sound , to my ear, is pinging, pre-ignition and then detonation.
My mercedes did that, never forgot that sound.