Fuel Injector Maintenance
#41
#42
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Joined: Jul 2011
Posts: 9,594
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From: Ft. Worth TX
as of today FST filters do not install to the OEM Merc mount --- Black production side nor any Volvo s. Also will not install to some of the Merc racing engines either.
If room allows the biggest filter the better but quality depending.
Racor is a good filter but not cheap priced either.
If room allows the biggest filter the better but quality depending.
Racor is a good filter but not cheap priced either.
#43
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Joined: Nov 2004
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From: On A Dirt Floor
#44
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Joined: Jul 2011
Posts: 9,594
Likes: 46
From: Ft. Worth TX
Straight out of the shipping box --- 496 injectors always need to be check out and service. NO BS these more times than not really need to be deep cleaned --- 


tested and flow tested - --- so very common as they suffer from many contaminates - he is one of them. Straight out of the box - 2008 app not that many hours



tested and flow tested - --- so very common as they suffer from many contaminates - he is one of them. Straight out of the box - 2008 app not that many hours
#45
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Joined: Nov 2012
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would you say the contamination in that injector would be from the ethanol content in the fuel, and fuel /water contamination to turn it that yellow/brownish color?
if there was no water contamination i would suspect thet the ethanol would just leave white deposits correct ?
if there was no water contamination i would suspect thet the ethanol would just leave white deposits correct ?
#46
Banned
Joined: Jul 2011
Posts: 9,594
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From: Ft. Worth TX
That set of 8 had rust thru out the cool fuel and alot of rust internally in the fuel rail. Water intrusion and it sat around for X AMOUNT of time. That was not from E 10 because the other engine was not like this period nor experienced the loss of 300 rpms. .
to further expand -- alot in the issues at hand cause injectors to end up contaminated internally all way thru the injector itself. .
Lack of maintenance
Lack of fuel maintenance
improper lay up for seasonal storage and or winterization.
water in the fuel and E 10 is NOT the main source of water intrusion
poor quality - some of these marine parts. ie: fuel rails , cool fuels, seals on top of the gas tanks, gas caps themselves, fuel lines, fuel pumps, fuel filters and so on.
496 injectors suffer from contamination -- so hard for them NOT to. I prob have 1000s of pics -- 496 injectors and most are in need of deep cleaning and flow testing beforehand.. Marine injectors suffer by far worse than ANY auto side injectors. BY FAR. - freaking junk yard auto injectors can be in better shape than alot of marine injectors sitting in owners garages.
to further expand -- alot in the issues at hand cause injectors to end up contaminated internally all way thru the injector itself. .
Lack of maintenance
Lack of fuel maintenance
improper lay up for seasonal storage and or winterization.
water in the fuel and E 10 is NOT the main source of water intrusion
poor quality - some of these marine parts. ie: fuel rails , cool fuels, seals on top of the gas tanks, gas caps themselves, fuel lines, fuel pumps, fuel filters and so on.
496 injectors suffer from contamination -- so hard for them NOT to. I prob have 1000s of pics -- 496 injectors and most are in need of deep cleaning and flow testing beforehand.. Marine injectors suffer by far worse than ANY auto side injectors. BY FAR. - freaking junk yard auto injectors can be in better shape than alot of marine injectors sitting in owners garages.
Last edited by BUP; 11-08-2018 at 12:33 AM.
#49
Banned
Joined: Jul 2011
Posts: 9,594
Likes: 46
From: Ft. Worth TX
YES I can. Any gas side injector I can test EXCEPT the Etec injectors. They require 50 Volts to do so and at steady state. But soon I will be able to test all Etec injectors. For those whom do not know etec that is Johnson and Evenrude outboards systems / engine and injectors.
I can TEST and clean all marine MPI and GDI and DI injectors for outboards, auto, truck, natural gas, jet ski, marine I/O and inboard. Even Merc Opti max - and Yamaha HPDI.
Also the 8.2 Mercruiser Cat engine and that requires special attention. Those injectors a person can really jack them up. And those are not cheap to buy period.
I do have alot to say about your injectors. for starters they become restricted flow in patterns and flow volumes.
VoodooRob as he has basically the same injectors. He knows what I had to do to make all that flow very very well again.
I will post more info about them. THANKS for asking as well.
I can TEST and clean all marine MPI and GDI and DI injectors for outboards, auto, truck, natural gas, jet ski, marine I/O and inboard. Even Merc Opti max - and Yamaha HPDI.
Also the 8.2 Mercruiser Cat engine and that requires special attention. Those injectors a person can really jack them up. And those are not cheap to buy period.
I do have alot to say about your injectors. for starters they become restricted flow in patterns and flow volumes.
VoodooRob as he has basically the same injectors. He knows what I had to do to make all that flow very very well again.
I will post more info about them. THANKS for asking as well.
#50
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Joined: Jul 2011
Posts: 9,594
Likes: 46
From: Ft. Worth TX

I have to give BUP a huge thank you and recommend his fuel injector service. My port engine always was lazy when cold and my revs were far off from stbd going up the rpm range. 600SCIs decided to send injectors in for service. Bup sent video of the injectors straight out of the boat and the video was eye opening. 2 Port engine injectors were lagging so far behind it was remarkable I didnt lean the engine out. Bup rebuilt and matched all the injectors, sent video for proof. I ran everything this weekend and now no cold run issue and my rpm are nearly identical match thru rpm range. The engines just idle like they never have and respond so much better. I have 260 hrs on the boat and engines. I am not one for any services to clean this or test this and that but Bup has the knowledge and abilities that made me a firm believer. If you have hours or some running issues look into the F.I. system and talk with Bup about service.







