1991 200 evinrude firing problems

[hinklemarine]

hey guys, i am a boat mechanic, but have come across something i've never seen before. this is very frustrating to have to go to a forum to get help, when i am a mechanic... but anyway.. here we go. i hit a big rock with my motor, and ripped the lower unit off and cracked my midsection. i have replaced both. now, my motor will crank, but will not get on plane. i replaced power pack, i've checked the keyway on flywheel and magnets, carbs, and plugs. i went to check the timing and i had no fire on #1 #3 #5, and when i grounded the #1 spark plug on the block to check the fire, i saw the #2 lead from power pack jump fire at the coil... what the heck is going on? this has baffled me? any ideas...

 

[Dhadley]

Re: 1991 200 evinrude firing problems

Welcome!!<br /><br />If I read this right we have no fire on the starboard bank, right? (The #2 arcing is probably unrelated but needs to be delt with.) <br /><br />If we're looking for spark on the starboard side have you looked at the shift interrupter?

 

[hinklemarine]

Re: 1991 200 evinrude firing problems

you know what, i think you might have a point there. i forgot that the shift lever rod that runs from the cable to the shift rod broke, and i got it wielded. the shift interrupter piece that is spring loaded sits on that piece didnt fit like it should. so, no i havent checked that.. don't you think that it's crazy the motor will still crank, and idle? i would think that no fire on one bank would make it not run, or idle rough.

 

[hinklemarine]

Re: 1991 200 evinrude firing problems

i've only been working on these boats part time for about 4 summers... so i am still wet behind the ears.

 

[Dhadley]

Re: 1991 200 evinrude firing problems

It'll run on 3 but just not real good. And that would sure explain not getting on plane.

 

[hinklemarine]

Re: 1991 200 evinrude firing problems

the arcing problem only exisists on the # 2 coil.. if i unhook the lead on from the powerpack, there is no arc. coil problems?? it seems like the coil is grounding out, or something is grounding out. i have a book, but no CD VOLTMETER...

 

[Dhadley]

Re: 1991 200 evinrude firing problems

It never hurts to bounce things off someone else. I was just talking to someone who's one of the best in the industry and he was having a problem with his V8. I cant say we figured it out yet (we will) but there were a couple of things he hadnt thought of.<br /><br />Sometimes you cant see the forest for the trees. It happens to everybody.

 

[Dhadley]

Re: 1991 200 evinrude firing problems

You might try cleaning all the grounds real good. A new plug wire may help too if it has too much resistance internally. The spark will always try to get to ground the best (easiest) way it can.

 

[hinklemarine]

Re: 1991 200 evinrude firing problems

so u dont think i have a coil prob?

 

[hinklemarine]

Re: 1991 200 evinrude firing problems

i guess i could swap the # 4 and #2 coils and see if the arcing changes cylinders..

 

[hinklemarine]

Re: 1991 200 evinrude firing problems

that shift interrupter piece, how does it work?<br />i saw the button, but never saw it move when i engage it to foward or reverse?

 

[hinklemarine]

Re: 1991 200 evinrude firing problems

i really appreciate your time and concern, thank you for your help!!!!!

 

[Dhadley]

Re: 1991 200 evinrude firing problems

Sorry! Work got in the way.<br /><br />Yes, absolutely switch a couple of the coils around. Those coils have a habit of building up some green corrosion on the towers. The connection for the primary wire gets overlooked a lot.

 

[hinklemarine]

Re: 1991 200 evinrude firing problems

hey, got it fixed!! it was the shift interrupter...!!! <br /><br />thanks man

 

[Dhadley]

Re: 1991 200 evinrude firing problems

Thanks for letting us know. So many times we dont hear if it worked or not.<br /><br />Good luck! Dont be a stranger!

 

[Dhadley]

Re: 1991 200 evinrude firing problems

Oh, to answer the other question -- it only works when coming out of gear into neutral. It momentarily interrupts the spark to the starboard bank so its easier to shift out of gear. If it wasnt there and the motor was idling slightly high you might not be able to get it out of gear. Or at least have a tough time doing it. It has to do with the aggressive angle on the engagement lugs on the clutch dog & gears.<br /><br />On the other hand, if the motor is set up properly and idling at around 500 (in gear) you dont need it at all.

 

[hinklemarine]

Re: 1991 200 evinrude firing problems

yeah, that's what i'm going to have to do, set the timing @-4 degrees, and adjust the throttle body so that it idles around 5-800 and comes out of gear..... once again, thanks man!!!! i should have figured this one out myself, but i'm glad i used this site! you have been a great help. i dont know if i told you but i hooked my timing light to it the other day and of course, it didnt work... i thought my light had messed up! but then today, i checked the timing light onthe #2 cylinder, and of course it worked....

 

[Dhadley]

Re: 1991 200 evinrude firing problems

Dont get all too concerned about the exact idle timing. A lot has to do with how low it sits in the water (backpressure). Especially those 3 liter motors. We just set the idle timing so it idles as best it can regardless of what the number is. Thats why they idle so much higher on the flushette than in the water. Obviously we pay a lot of attention to the full advance timing.