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  1. L

    Water on spark plug

    I have a 78, crusader 270 that I had a loss of power on and returned on one motor. After return I fired up the motor with issue and it would run and idle fine most of the time but did stumble at times and needed to give a bit of throttle then would inlet fine for a bit and stumble again, it also...
  2. L

    270 fuel pump

    I have a 78 Carver with twin 270's and a single fuel tank. Last fall as I was headed to have it pulled for winter the port engine lost power and eventually stalled and would not start. Checked canister fuel filter and that was about 1/2 full from what I recall and seemed fine. If I filled carb...
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    Harmonic balancer spun

    I have twin Crusader 270's, LH & RH. Both harmonic balances have spun. I have used the flywheel marks for timing, but one has not only spun but it has also worked its way to the back and rubs against the timing chain cover which could cause bad things over time. So my questions are; Is thee a...
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    Distriutor change

    I have twin 1978 270 crusaders with pint style distributors. I am changing to Prestolite idu7801B with B.I.D. Electronic ignition. They have two leads, a purple and a black. Can I just swap out and hook the purple to positive, before the balist resistor and black to negative on the coil? Or do I...
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    Crusader 270 choke

    I have a 1978 Carver with twin Crusader 270's with V-drives. I am going to have the carbs rebuilt and the chocks currently are not hooked up The mechanic doing the rebuild has suggested that I hook up the chokes. So as of now I had two questions. There is a 0 deg. and a 12 deg. What is the...
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    Timing mark on crusader 270

    I have been trying to set timing on a 1978 Crusader 270, LH rotation. Should be 10 deg.. BTDC. Using the plug wire for #1 cylinder the timing mark on harmonic balancer is no where to be seen/found. I started moving pickup to other wires. I found the mark using #7 plug wire and at 10 deg BTDCit...
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    Marine gaskets

    I am sure this has been covered before and that there are a number of opinions on this topic, but let’s go for it. What are the differences between marine gaskets vs. the standard automotive version? Application is; 1978 Chevy SM 5.7, Crusader 270. Thanks
  8. L

    Oil pressure

    Recently rebuilt Crusader 270 after a spun bearing. Plastigauged all bearing journals’ and all were at min specs. Oil pressure was 50 psi at 1500 rpm, now it’s at 80 psi at 1500 rpm. Less than 5 min on rebuild. Is this normal this new after rebuild?
  9. L

    Head gaskets

    Rebuilding a Crusader 270. I have heard and read that most gaskets are the same as automotive. As for head gaskets I have heard that you should use marine for every application, only if it is salt water application, use if it is a fresh water cooled, and last, if it is raw water cooled in fresh...
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    Leaky Qjet

    "Recently replaced the plastic "Recently replaced the plastic float with a brass and along with the other internal parts in a Rochester Q-jet. Upon installation and first test It fired right away but soon stalled. There was fuel running into all four barrels. Disassembled and found that the...
  11. L

    Rochester gasket

    Does any one know were you can Does any one know were you can get gaskets only for Rochester carbs with out getting the whole kit?
  12. L

    Water in lower unit

    "“72” 50 HP, new to me. Draine "“72” 50 HP, new to me. Drained lower unit and found water after running with muffs. Refilled and at boat landing, drained and had water again. When I changed impeller, I noticed that the shaft had some grooving. Is this the most likely cause? What are the options...
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    Quadrajets wanted

    "I have twin 5.7 270hp with mi "I have twin 5.7 270hp with miss-matched Rochester Quadrajets 4MV's, that are in need of some service. From what I have found, model numbers starting with 70 are pre about 1975 and are 650 CFM, ones starting with 170 are after that and are 700 CFM. If i am going...
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    Oil usage

    "I have twin 5.7L, 270HP, 1978 "I have twin 5.7L, 270HP, 1978 Crusader motor. RH rotation has about 1200 hrs. and LH has about 400 hrs. In the last six weeks or so the RH motor has started using oil at the rate of about quart in a 30-45 cruse, running at 3500 RPM’s. There was a slit valve cover...
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    270 Qjets

    "I have a pair of crusader 270 "I have a pair of crusader 270. One has a Rochester #17082403 which is listed as a 4MV, used on both the 350 CI & 454 CI. The other has a #7028282 which is also listed as a 4MV used on a 427 CI. what is the difference in the two units? Or are they interchangeable?"
  16. L

    Running engine with out water

    "This is my first spring with "This is my first spring with a boat with inboards. I want to make sure things go as smooth as possible at launch time. The boat has a pair of crusader 270 with Walter V-drives. There is no were to put muffs on a lower unit for cooling, so how long can the engines...
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    Crusader 270 with Quadrajet carbs

    "I have a 77 Carver with Crusa "I have a 77 Carver with Crusader 270's. Carbs are Quadrajet's. One of the chokes is not hooked up to the choke plate linkage, if I hook it up it startes very hard and barely runs. If I keep it unhooked it starts great. I am thinking of changing chokes to electric...
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