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pgenesta

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Good morning to all.

I am new to the boating bug and recently purchased a 1988 Burns-Craft Dynasty 374.

The boat has twin 454ci Crusaders and this past weekend I could not get the starboard over 2700 rpm's.

The thinking is that I may have clogged fuel filters. So, the question is: how many fuel filters do these motors have and where are they located?

The reason I ask is that in discussing this with a friend yesterday, he mentioned that on his boat he had filters "down below" that he did not know he had until he encountered a similar problem and the filters were cleaned/replaced.

Any thoughts?
 
Each engine should have one fuel/water seperating filter. Down below means that it is housed below your deck. If you follow the fuel line from the fuel tank to the carburator, you will find the fuel filter for each engine. You may have the old canister type that you unscrew and simply put in a new filter cartridge or the newer ones that look like an oil filter that you just unscrew and replace the whole thing. The filters are probably mounted on the fire wall aft of the engines. If you pour the fuel from the filter (be real careful) into a glass jar and let it sit, you can often see a white milky substance that settles at the bottom. That stuff is the water combined crud that the filter has trapped. You can thank ethanol fuel for that mess.
nightstalker
 
You have two fuel filters "on the engine" and there may be an additional one between the fuel pump and the tank (builder or previous owner added). The primary filter is a canister type. there is an additional one inside the carb
 
As usual, makomark is 100% correct while I'm only a little correct I guess. I totally forgot about the fuel filter on the engines. Sorry, just trying to help. That being said, my vessel doesn't have the canister type fuel/water seperators where you just replace the inside filter. I have fuel/water seperators that look like oil filters and screw on the same way.
Nightstalker

nightstalker said:
Each engine should have one fuel/water seperating filter. Down below means that it is housed below your deck. If you follow the fuel line from the fuel tank to the carburator, you will find the fuel filter for each engine. You may have the old canister type that you unscrew and simply put in a new filter cartridge or the newer ones that look like an oil filter that you just unscrew and replace the whole thing. The filters are probably mounted on the fire wall aft of the engines. If you pour the fuel from the filter (be real careful) into a glass jar and let it sit, you can often see a white milky substance that settles at the bottom. That stuff is the water combined crud that the filter has trapped. You can thank ethanol fuel for that mess.
nightstalker
Click to expand...
 
pgenesta said:
Thank you guys for the help.

Nightstalker, I see you're out of CT, hope to have the pleasure of meeting you someday.
Click to expand...

I see that you are in Niantic. I'm in Noank, only a few miles apart. I'm sure we cover the same waters. Good luck with your new vessel.
Nightstalker
 
Be sure you still have the original carbs...if not you may be looking for a long time on the carb and never find one
 
I'd not limit myself to a fuel delivery issue only.
Check and see what your ignition advance is offering at BASE, and more importantly, up to 3.2k rpm.

Just yesterday I went to a boat on the water to find an issue.
The owner's old tired ignition system was delivering ZERO spark lead..... I mean ZERO.
It was operating on BASE advance only.

An engine under load, without the correct ignition lead, will not make RPM nor any power what-so-ever.

If you eliminate Ignition as a possible source of the problem, you can more successfully move on to other potential issues.
 
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