318 doesn't idle 75 F-26

kevin babineau · Post by **kevin babineau** » Mon May 18, 2009 9:18 pm

if ur looking at it like its car and the crankshaft is turning clockwise that is a clockwise motor...or the portside....on the outside of the boat the prop will be a lefthand.....ur distributor will be turn clockwise ragardless of model....when u bring #1 which if looking at it like a car would be driverside....the driverside bank is 1,3,5,7...when u take the spark plug out and stick ur finger over it ull feel the compression biuld in number one...at that time at the very top both rockers should be loose..pushrods spin in ur fingers...that will be number tdc...the distributor placement does not really have a effect as long as number one goes to number one cylinder...in a clockwise order ur firing order is 18436572....and your points gap is .017....there shouldnt be ...what u said it wants to run 180 off..u said u changed distributor so it couldnt be a dist. bushing...proper timing can be confusing... there r different figures and procedures ...some go of the damper in the front of the motor and some use an access cover on the flywheel housing....timing can be 5btc..0btc...12.5btc....but as long as a base line is set...it should run...what u do is take an outboard motor gas tank and put fresh fuel in it...disconnect ur old system....squeeze the bulb to prime....with a remote starter button try to fire it....if it doesnt come to life i would look to other areas....starting with finding a carter carb that is good ....hopefully u can borrow one to try...yes electronic ing will help preformance but u need to get it running have decent first....another trick is when its running to shoot fuel into the carb..i have a mister designed for that...it tell me that ur idle circuit in the carb is not working

rdj59 · Post by **rdj59** » Mon May 18, 2009 9:59 pm

The firing order was one area that i'm having a hard time grasping. The 18436572 i have down pat from working on some buicks and chevys. When looking up the firing order, an auto engines dist will turn clockwise and use the 18436572 firing order. My dist turns the same clockwise direction as an auto but the motor is a reverse rotation motor as the crank also spins clockwise. Or at least this is what i'm lead to understand from doing some research. If the motor is reverse rotation should the crank be turning? Also, the prop on it is a right handed prop.

kevin babineau · Post by **kevin babineau** » Mon May 18, 2009 10:39 pm

if the engine is clockwise when looking at it from the front...like opening the hood on a car the front of the engine where the harmonic balancer is will be turning clockwise.....if it is ccw the harmonic balancer will be turning ccw ...on both the distributor will turn clockwise......the standard clockwise rotation motor is a LM318 meaning that it is a lefthand motor...yes confusing....now imagine that u mount the transmission like a horse facing the front of the motor....if u look at what the flywheel is doing it is turning to the left..thus lefthand motor LM318.....if it is a counter rotating meaning counter clockwise (which should be a starboard motor) the ccw motor sitting on the tranny like a horse facing the front the flywheel will be turning toward the right thus RM318....M stands for Marine......on ur motor in forward gear standing outside the boat aft looking forward under the boat the prop should be turning to the left...the letter after denotes horsepower/carb configuration...a LM318A is 190hp with a 2barrel LM318B is a 210hp with a carter AFB (aluminum four barrel) the LM318C which i have nevere seen is a 195hp with funky YH side draft carb

ready123 · Post by **ready123** » Mon May 18, 2009 10:54 pm

rdj59 wrote:The firing order was one area that i'm having a hard time grasping. The 18436572 i have down pat from working on some buicks and chevys. When looking up the firing order, an auto engines dist will turn clockwise and use the 18436572 firing order.

If your engine is RH then the firing order is: 1 2 7 5 6 3 4 8
The number 1 cylinder is the front cycl on the left side when looking from the rear of the engine towards the water pump.

Above firing order is for: R10 R13 R15 R25 R30 and L19
NOTE: L19 is in fact reversed due to the Borg Warner reduction box turning prop opposite to engine.

Hope that helps.

rdj59 · Post by **rdj59** » Mon May 18, 2009 10:56 pm

When looking at the engine from the rear with the front of the motor pointing towards the bow. The flywheel is turning clockwise or towards starboard. Does this style motor use a timing chain set up or does it use a timing gear setup? The reason i'm having a hard time figuring what engine this is, is because the original id plate from the engine is missing.

Thank you very much,
Jeramie

ready123 · Post by **ready123** » Mon May 18, 2009 11:03 pm

The firing order I gave was for an engine coded RH which refers to the prop rotation. So if you have a RH prop then the firing order is as I said.
If LH prop then order is 18436572.

Why not buy a digital manual from here, you can get it in minutes:
http://www.marineengine.com/manuals/chrysler/index.html

gjrylands · Post by **gjrylands** » Mon May 18, 2009 11:03 pm

My 318's had a timing chain.

kevin babineau · Post by **kevin babineau** » Mon May 18, 2009 11:08 pm

from what ur saying and if u read what i said....ur saying that if ur sitting on top of the tranny facing forward the fly wheel---not the harmonic balancer is turning clockwise toward starboard then u have a righthand motor which is a counter rotating motor....meaning if ur looking at it like a car with the hood up the harmonic balancer is turning ccw...ur firing order is 12756348 ur distributor will turn clockwise...ps i didnt see that others responded...im repeating them

ready123 · Post by **ready123** » Mon May 18, 2009 11:25 pm

rdj59 wrote:When looking at the engine from the rear with the front of the motor pointing towards the bow. The flywheel is turning clockwise or towards starboard. Does this style motor use a timing chain set up or does it use a timing gear setup? The reason i'm having a hard time figuring what engine this is, is because the original id plate from the engine is missing.
Thank you very much,
Jeramie

Clockwise engine rotation is firing order I gave you, not what you were using. Yes it uses timing chain.

rdj59 · Post by **rdj59** » Mon May 18, 2009 11:26 pm

Sweet, that is what i wanted to know. So my distributor is turning the right way, the motor is turning the right way, and the firing order that i've checked a million times is correct. Last thing that i can easily check would be a carb issue. I have a spare q-jet that was on a running 350 buick that i can try out and see what happens. Otherwise the only thing i can see wrong is the cam is out of time.

kevin babineau · Post by **kevin babineau** » Mon May 18, 2009 11:29 pm

...the order is as mike said 12756348...id find a carter

ready123 · Post by **ready123** » Mon May 18, 2009 11:30 pm

rdj59 wrote:Sweet, that is what i wanted to know. So my distributor is turning the right way, the motor is turning the right way, and the firing order that i've checked a million times is correct. Last thing that i can easily check would be a carb issue. I have a spare q-jet that was on a running 350 buick that i can try out and see what happens. Otherwise the only thing i can see wrong is the cam is out of time.

Or stretched timing chain.

kevin babineau · Post by **kevin babineau** » Mon May 18, 2009 11:34 pm

u said u had it running...i had a guy who put the wrong rotation starter in his boat but it would only pop

rdj59 · Post by **rdj59** » Mon May 18, 2009 11:48 pm

It will run if you keep the rpms up. When the motor is running it's running pretty rough. It vibrates pretty good and feels like it's beating itself up. I pretty sure this is because the timing is so far advanced that it's firing just as the cylinder is coming up. I'm also pretty positive that it's firing on all cylinders as it doesn't sound like it has a miss.

kevin babineau · Post by **kevin babineau** » Mon May 18, 2009 11:58 pm

i wish i could say for sure...it sounds like u know what ur doing....the 2 things i dont like is 1 the carb and 2 the low compression....u said the motor could have alot of hours..as u know it could have a stretched chain...worn cam... ...etc..if ur firing order wasnt the quick fix and it runs at a high rpm without a miss...without diving into the internals id question the quadra bog