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Author Topic: cruise 2 engine tries but fails to start  (Read 858 times)

lou984

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cruise 2 engine tries but fails to start
« on: November 20, 2017, 10:01:22 PM »

'01 cruise 2, ran lovely. but only on kick start,got the electric start going by replacing parts in the starter clutch, mainly the starter gear, gear sprag and the start clutch bendix. new spark plug, battery. now started her up twice with electric start, try to turn her over again and now it won't even kick start, you can hear the engine trying but not getting that final oomf sounds like its starved. checked the spark plug all good, checked the carb twice, all good. fuel is fresh. battery on charge but connected it to my car and nothing. tried bump starting it. zip. haven't checked the kill switches as it was running a couple of hours before and nothing had been done after starting it, didn't even move it. turned it over to show a neighbour and nothing. engine has compression, spark, fuel, checked the abc's. not checked the starter solenoid, cant think of anything else to check. neighbour says it sounds like the ignition timings off if that helps. 
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Joss

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Re: cruise 2 engine tries but fails to start
« Reply #1 on: November 21, 2017, 09:44:25 AM »

engine has compression, spark, fuel, checked the abc's. not checked the starter solenoid, cant think of anything else to check. neighbour says it sounds like the ignition timings off if that helps.

What was the compression reading, quality of spark, plug gaps and are you getting fuel into the cylinder?
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lou984

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Re: cruise 2 engine tries but fails to start
« Reply #2 on: November 21, 2017, 10:16:25 AM »

Donít have a compression tool, used a finger instead. Spark is lovely single arc, fuel is going to the carb (My hand got squirted ) havenít checked the carb bowl for crap. After discussing this problem with my other half, the fuel line from the carb to the engine came up. Could the line be blocked to the cylinder?
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Joss

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Re: cruise 2 engine tries but fails to start
« Reply #3 on: November 21, 2017, 12:52:59 PM »

Donít have a compression tool, used a finger instead.

One of the biggest myths ever told. Dont waste your time, get a compression tester. Your finger will not hold 200PSI.

Spark is lovely single arc, fuel is going to the carb (My hand got squirted ) havenít checked the carb bowl for crap. After discussing this problem with my other half, the fuel line from the carb to the engine came up. Could the line be blocked to the cylinder?
Arc colour?
I asked for fuel to the cylinder, not carb. Pull the plug, turn it over, do you get fuel on your finger or tissue? There is no fuel line from the carb to the engine as such, its called your inlet rubber. I highly doubt its blocked but you can check it.


That rubber on the end of the carb.

It will be compression, spark or fuel. You have yet to rule out any of the three. Start by doing that and we should get it running.

« Last Edit: November 21, 2017, 12:56:58 PM by Joss »
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lou984

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Re: cruise 2 engine tries but fails to start
« Reply #4 on: November 21, 2017, 02:20:50 PM »

Sparkplug had a nice bright blue colour, checking out compression tools now. Sparkplug had a smell and feel of fuel on it not too wet, not dry. Should I strip the carb and clean the bowl?
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Joss

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Re: cruise 2 engine tries but fails to start
« Reply #5 on: November 21, 2017, 03:48:55 PM »

Not until you check if your getting fuel into the cylinder. If you are, then look at compression and spark, if your not, strip the carb dont just check the bowl, check the jets are clear too.
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lou984

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Re: cruise 2 engine tries but fails to start
« Reply #6 on: November 28, 2017, 09:24:25 AM »

Checked the compression came out 175. Have spark. Used a Hayes manual to get a rough idea, did the wet test came out the same. Even tried bump starting it, no joy. Stripped the carb, cleaned the jets found crap in one of them. Still nothing, decid d to look at the parts I put on. Soon as I opened the side and removed the new parts from the crankshaft found a sliver of the woodruff key 😌 mocked up and temporary followers x and she started to try more than before. Assuming the flywheel was slipping on crankshaft. Ordered some and fingers crossed it solves the problem.
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Joss

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Re: cruise 2 engine tries but fails to start
« Reply #7 on: November 28, 2017, 01:50:48 PM »

Checked the compression came out 175. Have spark. Used a Hayes manual to get a rough idea, did the wet test came out the same. Even tried bump starting it, no joy. Stripped the carb, cleaned the jets found crap in one of them. Still nothing, decid d to look at the parts I put on. Soon as I opened the side and removed the new parts from the crankshaft found a sliver of the woodruff key 😌 mocked up and temporary followers x and she started to try more than before. Assuming the flywheel was slipping on crankshaft. Ordered some and fingers crossed it solves the problem.

Hyosung service manual pdf on this forum should help more.

I dont recall you saying you were tinkering with the crankshaft from your original post? You said it was running lovely till you added the electric start but it did run after you added it. Woodruff key shearing is never a good sign. Good job on the carbs, that would of come back to bite you at some point although at this stage it probably feels like you wasted time on it. Keep us posted. Some photos wouldnt go a miss  ;D.
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Cloud

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Re: cruise 2 engine tries but fails to start
« Reply #8 on: November 28, 2017, 03:12:06 PM »


Better the key shearing than whatever the next weakest thing was.
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lou984

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Re: cruise 2 engine tries but fails to start
« Reply #9 on: November 28, 2017, 08:58:22 PM »

still have the wood-ruff key that was in it, well whats left of it, in a little bag for a memento. at the start i replaced the starter idle, the sprag gear that sits behind the flywheel, and the starter clutch with the rollers that attaches to the flywheel. which sits on the left of the crankshaft if i'm right, correct me if i'm wrong by all means. Those three part were missing, i replaced them and it came across as a timing issue when it would start after 2 nice starts. when i originally opened up the side to see the flywheel, it was set back further than it should and no timing issues as i could kick start it. after reading up and looking in the haynes manual ( not mechanically savi ) that's how i found which parts were missing. looked at the flywheel closer, seems fine, no chips or damage or cracks, but did notice some claw marks on the bit you attach the puller to, the flat bit just after the holding nut. i'm assuming some one has removed these missing parts and man handled that area, hence why i think they could have damaged or replaced the key with the wrong size i'm not certain as i don't have the full mot history, only what i could see online, passed every year with no advisories until aug 2016. carb jets cleaned poked with brass wire from cleaning brush (pulled them out of the handle) dosed in carb cleaner then air blown dry. main jet, small jet and 2 other jets one of which i found the crap in. carbs looks brand new now. couldn't get the float pin out but the float needle was not sticking. oh also the needle with the crap in was bent slightly so I've gently straightened it. possibly have to replace that. used some of my modelling tools the straighten it. I've attached a link to the pics of the parts and the tool used.  just got to wait now till Fri or Mon when a 80pcs set of wood-ruff keys, with different sizes ranging from 3*3.7 to 6*9mm if anyone needs some in that range let me know  :)

 https://photos.google.com/album/AF1QipPfVx-UIkEoibpaypc1Yuk0oN1qPo2-XWxgb107
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