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Anyone Know Much About Chev Engines


mattpwc

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  • Member
  • Member For: 20y 5m 22d
  • Location: New Zealand

hey everybody... I have a boat with a 63' 327 chev with a twin barralled holley carb and am having some issues that have me stumped... went to our local lake on thurs... ran great and on friday to... sat started to get a very uneven idle, sort of surging so I turned the idle up a bit... then it seemed to be missing under power... then it wouldnt start... checked points, plugs, cant check timing cause wont idle... could it be fuel pump or carb issues?really lost... help

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  • Member
  • Member For: 20y 2m 19d
  • Gender: Male
  • Location: Mildura

wounds like either fuel pump or dizzy problem mate.

also check your timing, when u say its difficult to start does it sound like its got a flat battery? like its struggling to turn over? if so then shes to far advanced. just back the dizzy off a tad.

if its a relatively stockish 327 they run about 7-15 degrees positive.

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  • Member
  • Member For: 20y 5m 22d
  • Location: New Zealand

cheers mate... il check the dizzy first as I suspect it may have slipped... with the left and right adjustment would the middle be tdc... and looking from the back of the engine to the front( the dizzys is right in front of you then) is adjusting left adv or ret? thanks for any help or info...

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  • - Track Bound EVO III -
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  • Member For: 19y 11m 12d
  • Gender: Male
  • Location: Strapped in and holding on

I see your problem. 3 days of skiing... you have too much time on your hands..

Does it run a timing chain?? might be stretched?? set all your timing marks to check it..

disconnect a fuel line and crank it over to chek the pump. Pull a lead off to chek spark.

running rich??

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  • Member
  • Member For: 20y 1m 3d
  • Location: gold coast

easiest way to check the timing is turn the engine over put the timing mark an the harmonic balancer on about 7 degrees btdc on the timing mark then lift the dizzy cap and see if the rotor is lining up with number 1 plug lead on the cap if all is good timing is ok

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  • Mal Wood Automotive
  • Member
  • Member For: 22y 20d
  • Gender: Male

Checking timing on boat motors can be difficult. Many have no harmonic balancer, and the cam is generally advanced to buggery. Sounds like a fuel supply issue.

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  • Member
  • Member For: 20y 5m 22d
  • Location: New Zealand

thanks for the advice guys... its a marinised 327 chev... basically its a mercruiser cause all they are are chev blocks with their heads on anyway... looks like im gonna be a busy boy tommorow but im sure well get it going on the advice ive got from you guys... cheers again

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