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  1. D

    HP 6BT oil change

    Just a quick question picking up a new boat with HP 6BT engines what is normal intervals for an oil change for this engines? Thank you.
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    Tamd41

    Just a quick question I am brining 31' 13000lbs boat with twin TAMD41 to a new home which is 250nm away, not familiar with this engines fuel burn, how much fuel should I have to be able to make a non stop run at cruise. Thank you
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    changed carb engine runs hotter fuel air mix?

    Replaced the carb on my 454 crusader fuel consumption is very good now, but the engine is running 20 degrees hotter and going from idle to 1000 rpms slowly it almost shuts down if i push the throttle faster it runs good a guy in my marina told me its not getting enough air in the combustion...
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    mid 80s 454 fuel flow scan installed?

    got fuel scans installed this is the readings i am getting can anybody tell me if its close to norm 750cfm quadrajets 34' luhrs thank you 1200 rpms 2.7 gph 1360 rpms 3.4 gph 1650 rpms 4.7 gph 2000 rpms 7.2 gph 2300 rpms 9.3 gph 2420 rpms 11.6 gph 2550 rpms 15gph seems like a high jump? 2900...
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    carb?

    I have been trying to chase down fuel consumption on one of my 454 changed wires plugs still port is burning 3-4GPH more. Not much knowledge about carburetors, but i did notice the numbers stamped on them are different, maybe old owner of the boat just installed much higher cfm carb on 1 side...
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    Cold weather use

    I just wanted to know if i can I just wanted to know if i can use couple of bildge heaters and not witerize the engines so i can keep running the boat in cold months I am in the north east and the temps do drop. I have FWC 454 used in salt water. Before I had boat with detroit diesels and never...
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    454 fuel problem

    "Well seems like as soon as I "Well seems like as soon as I found coolant leak it was the gasket between the block and manifold I just got new challenge here it is one of my engines burns more fuel and I am not that familiar with the world of carburetors. Is it most likely carb problem or...
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    Loosing coolant on 454 fwc

    I have 1984 454 fwc engines on I have 1984 454 fwc engines on my starboard engine I loose 1 gallon of coolant every 50 hours of running time. Engine does not overheat and runs fine didn’t see any traces of coolant in oil. Can it be the head or I have to look for a leak. Thank you One more...
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    1984 model 350hp 454 question

    What is expected life of the 4 What is expected life of the 454 if it is properly maintained and not pushed over 3400rpms. Engines currently have 1100 hours oil pressure 35 at idle 40 at 2500rpm 40 at 3200rpm 42 at 4000rpm on the port and temp is at 175. Starboard engine oil pressure 40 at idle...
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    318 questions

    "Iam new to the gas marine eng "Iam new to the gas marine engines always had diesels, but the deal was to good to pass what i need to know is 1. what kind of oil do i use and how many hours before oil changes 2. what rpm is a good cruise for 225hp 318 3. boat is 11400 lbs dry what is...
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    671 oil leak

    "It looks like one of my engin "It looks like one of my engines has a leak right around the my twin disck trans my thinking is rear main, is there anything else to look for and can it be changed with out pulling the engine?"
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    671n hard to start

    I have twin 671n's in my b I have twin 671n's in my boat if I don't use it for couple of days it takes a lot of cranking to get it going or if i push throttle open to about 30% it will start but at about 1000 rpms any suggestions or help? THANK YOU
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