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Dec 30th, 2023
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 Mercury 150 Oprimax won’t start
#15024060
03/22/24 02:40 PM
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Joined: Dec 2008
Posts: 421
Snug
OP
Angler
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OP
Angler
Joined: Dec 2008
Posts: 421 |
I purchased an 07 Nitro 591 with Mercury 150 Optimax. I put it in storage and treated about a gallon of fuel that remained in the tank. Pulled it out of storage to get it ready. Batteries on charge, tried and it’ll spin over but won’t start. Changed plugs, fuel filter and added sea foam to to the 16 gallons. Charged the battery again and again, still cranks but won’t start. I get an old fuel smell. I’m getting spark, fuses are all good.
I’ve read the battery needs to be perfect for these to start.
Any thoughts or ideas?
Thanks,
Doug
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Re: Mercury 150 Oprimax won’t start
[Re: Snug]
#15024089
03/22/24 03:10 PM
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Joined: Jul 2010
Posts: 1,358
boatman025
Extreme Angler
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Extreme Angler
Joined: Jul 2010
Posts: 1,358 |
Do you hear fuel pump running, I would pull kill switch and rehook up. pm if have any question
Hughes Marine
3855 Osage Lane
Wylie ,Texas
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Re: Mercury 150 Oprimax won’t start
[Re: Snug]
#15024123
03/22/24 03:47 PM
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Joined: Dec 2008
Posts: 421
Snug
OP
Angler
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OP
Angler
Joined: Dec 2008
Posts: 421 |
Pulled the kill switch and reset it and still nothing. I can hear the pump kick on.
Last edited by Snug; 03/22/24 04:12 PM.
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Re: Mercury 150 Oprimax won’t start
[Re: Snug]
#15024220
03/22/24 05:32 PM
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Joined: Jan 2005
Posts: 17,274
Pat Goff
TFF Guru
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TFF Guru
Joined: Jan 2005
Posts: 17,274 |
Two strokes are pretty simple machines, fuel/spark/compression
Easiest way to test which direction is to open the butterfly on the intake and give it a good squirt of starting fluid. If it fires, you know it's fuel delivery, if it doesn't then you know it's not getting spark.
Pat Goff Seadrift TX ![[Linked Image]](https://i.ibb.co/X48Kbbq/scooter-shallow.jpg)
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Re: Mercury 150 Oprimax won’t start
[Re: Snug]
#15024341
03/22/24 07:44 PM
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Joined: Dec 2008
Posts: 421
Snug
OP
Angler
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OP
Angler
Joined: Dec 2008
Posts: 421 |
Weak battery was the culprit. It would charge, just not enough to get it over the top when cranking. All is well now. Thanks
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Re: Mercury 150 Oprimax won’t start
[Re: Snug]
#15024726
03/23/24 02:57 AM
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Joined: Jan 2005
Posts: 17,274
Pat Goff
TFF Guru
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TFF Guru
Joined: Jan 2005
Posts: 17,274 |
Pat Goff Seadrift TX
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Re: Mercury 150 Oprimax won’t start
[Re: Snug]
#15027633
03/26/24 12:00 PM
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Joined: Apr 2004
Posts: 14,160
Stump jumper
TFF Guru
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TFF Guru
Joined: Apr 2004
Posts: 14,160 |
Weak battery was the culprit. It would charge, just not enough to get it over the top when cranking. All is well now. Thanks Optimax's need a strong battery. 1000 CCA minimum.
2200 Bay Champ/200 Mercury Optimax
2017 Tundra TSS 4x4 Crewmax 5.7L
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Re: Mercury 150 Oprimax won’t start
[Re: Stump jumper]
#15028576
03/27/24 04:07 AM
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Joined: Dec 2010
Posts: 5,613
Mckinneycrappiecatcher
TFF Celebrity
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TFF Celebrity
Joined: Dec 2010
Posts: 5,613 |
Weak battery was the culprit. It would charge, just not enough to get it over the top when cranking. All is well now. Thanks Optimax's need a strong battery. 1000 CCA minimum. Yeah, they need a good one that’s for sure. Bigger center consoles run 2 of that size and that doesn’t include the 3 TM batteries under the console. Not quite sure if bass boats run two batteries or not, might be a bay boat only design out of an abundance of caution.
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