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Need Help 2007 90 Hp Optimax Rough Idle

M

Madbig1

New member
2007 90 Hp Optimax

Idles rough then dies within 5-10 seconds, restarts right back up with same results.
Fuel Pressure-110 lbs
Air Pressure-90 lbs
Has great spark and compression is 125 lbs on all 3 cylinders
Spark Plugs look wet

Any ideas???

Mark
 
Madbig1 said:
2007 90 Hp Optimax

Idles rough then dies within 5-10 seconds, restarts right back up with same results.
Fuel Pressure-110 lbs
Air Pressure-90 lbs
Has great spark and compression is 125 lbs on all 3 cylinders
Spark Plugs look wet

Any ideas???

Mark
Click to expand...

Same problem for me 2007 Optimax 115

Test with Mercury diagnosis computer with no faults

After check the rail we see this
IMG_20180201_024911_714.JPG

This picture from internet but the same thing

Sparks wet, smoke alot fuel
 
mine was coils ===you have to change all 3. Dont buy the mercury ones- you can get the haltech ht-020114 for 71$. Made in same factory- all specs are identical. Even stampings are the same.
They cost 71$- See bulletins 2009-26 and also 2007-25R2 Those will help alot. Now- as 2009-26- it also affected my 115- the coils break down from normal use---heat and vibration- so they might test good- that is why mercury says "change all 3".
[h=2]HT-020114[/h]



I had a choice- buy 3 that were in a mercury box for 125-150 each, or 3 haltech ones in a non mercury box for 71$ each. I opted for the haltech and trust me- I tested every spec on those tsbs and these coils are within every spec- which makes perfect sense- they are made in the same factory in china. If you want some made in the US- get CDI--they are 100$ each. The ones from LEADER--are not made in the merc factory- but are chinese generics.

This was a personal choice I made- since I have 3 merc coils that gave me untold frustration---so I wasn't in any hurry to spend 2x the price for the same thing.
good luck.
 
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