Power Pack on 93 Johnson GT 200

[Aquaman-PSD]

I am pretty sure I have lost a power pack. I am going to check it tonight to make sure. First going to see if I have spark at all 6 plugs. I have also been told that you need to check the coils coming from the power pack. They should have ~250volts. Judging from everything I have read on here about what happened when power packs go bad I'm pretty sure that's what's wrong. The motor misses at times, runs rough, and now hardly runs at all and I can tell that at least one of the cylinders isn't firing because the motor will not gain RPMS and when I shut the motor off I can see fuel coming out of what I assume is the exhaust and sounds aweful. I just replaced the plugs and had a compression check done two weeks ago and everything was fine. Water pump is peeing fine so I don't think it's blown, just not getting spark. First questions is a dumb one. Does a power pack go by a different name? I can't seem to find the part on Iboats parts section. Second question is how difficult these are to change and to identify which pack is bad? I am pretty sure on this motor they sit right under the fly wheel so I will need to take off the fly wheel to get to them. I would really like to do this myself because I just had a $600 bill from the marine shop two weeks ago and if I have another one I might be looking for a new place to live! :grumpy:

 

[Daviet]

Re: Power Pack on 93 Johnson GT 200

You might want to go to the CDI website and look up your engine, use their trouble shooting guide to help you check out your system.
The parts breakdown that I looked at called it a power pack.

 

[daselbee]

Re: Power Pack on 93 Johnson GT 200

http://www.*****************/boat-forum/showthread.php?416343-99-Johnson-200-overcharging

More testing is in order, though, I think.

EDIT:

Ah well.....they *******'ed out my link. Sorry. It is over on m a r I ne engine dot com.

 

[Aquaman-PSD]

Re: Power Pack on 93 Johnson GT 200

another dumb question... I have no idea what model number my motor is.. should there be a tag on there somewhere with the model number or can I just use the serial number on the transom mount?

 

[175se]

Re: Power Pack on 93 Johnson GT 200

if its a 93 it only has one power pack, that black thing top rear of motor, on your t bracket if theres a ser # then there should be a model # above it. And as #2 said cdi has great t-shooting guide.

 

[boobie]

Re: Power Pack on 93 Johnson GT 200

The model # should be on one of the stern brackets. Or on a quarter size core plug on the block.

 

[Aquaman-PSD]

Re: Power Pack on 93 Johnson GT 200

Alright thanks guys I didn't get to try it last night due to the fact that I need someone to turn the key while I check for spark and then it started raining. Just when the river was starting to look soooo good now its going to be back up to almost flood level in a matter of two days!

 

[Aquaman-PSD]

Re: Power Pack on 93 Johnson GT 200

Alright well I went home last night to check each cylinder and didn't get a chance. I fired the engine up and when I reved it I noticed smoke coming from under the intake manifold. I shut it off and took a look. On the front of my motor there is the intake manifold. I can see where the intake for each cylinder comes from each individual carb. Where the Manifold bolts the the engine block there is a Philips head plug looking thing for each cylinder except the top left one. I have no idea what these holes are for or why they are plugged all except one. That is where the engine is back firing out of. I can tell it has been doing it because there is oil and black crap slung all over the place in the area. I guess I never was missing spark it was just that cylinder wasn't getting compression... I know this is clear as mud but I don't know how else to explain it. I just had some engine work done that included work to the carbs so maybe they forgot to put the plug back in... If so did it cause any unfixable damage to the motor? I am dropping it off tonight and I am very interested what they have to say. I also found one other actual bolt on the intake manifold that is backing out... Not real happy with the local marine shop right now.

 

[daselbee]

Re: Power Pack on 93 Johnson GT 200

not sure of where you are describing plugs that are in the side of the intake....

Any chance for a pic?

 

[175se]

Re: Power Pack on 93 Johnson GT 200

I wonder if that's for the reed box, that's the only thing I can think of,with Phillips screws on the intake.

 

[boobie]

Re: Power Pack on 93 Johnson GT 200

I'll go along with the reed box too.

 

[daselbee]

Re: Power Pack on 93 Johnson GT 200

Phillips screws hold the reed blocks to the intake, but in a front to the rear direction, two per reed block.........is one of them missing?
If so, no open hole behind the screw, the screw threads into the reed block without going all the way through.
If one screw is out, maybe the reed block gasket has a massive leak, which would show up out in front of the carb for that cylinder.
It will massively rain gas out the front of that carb.

 

[Aquaman-PSD]

Re: Power Pack on 93 Johnson GT 200

That makes sense. I had to limp it back to the dock with it running like crap and when I shut the motor off I had a pretty large oil slick coming from the motor. So let me take this a little further, that means that the carb wasn't pushing gas into one of the cylinders so it wasn't getting oil either. If that is the case and it comes to be that the cylinder is scored I have no idea how I am going to handle that with the marine shop. It is pretty obvious that this is a screw that the mechanic left out, and on top of that there is a second manifold bolt that is coming loose! I have attached a picture that shows the rough location of the screws. It looks like there is only one for each carb and like a said when I rev the engine it back fires through that hole where the screw used to be and should be. I dropped it off at the marine shop and they are going to look at it this morning so I guess we will see. I would like to learn as much about it as I can just incase they try to screw me.

 

[daselbee]

Re: Power Pack on 93 Johnson GT 200

That pic is very small. But, I am sure that you are pointing to something that is NOT the Phillips screws that we have been speculating about. It looks like you are pointing to the back of the air silencer assembly.

 

[Aquaman-PSD]

Re: Power Pack on 93 Johnson GT 200

yea not sure why the picture uploaded like that. I am pretty confident that the ones I am talking about are plugs for something. The hole itself is about 3/8'' ID. The Phillips screws don't seem to be there to hold anything on but to just plug a hole. Either way the marine shop is looking at it so I should have an answer tomorrow. I just really hope they are honest if it could have caused any damage to the motor.

 

[Aquaman-PSD]

Re: Power Pack on 93 Johnson GT 200

Ended up being a Reed Plug? Don't have a clue what that is but they put it in and it ran fine this weekend.

 

[daselbee]

Re: Power Pack on 93 Johnson GT 200

No such thing.
I know these engines pretty good....

Boobie? What are they talking about?

Get a better pic of the area....