engine is hard to start after big bore install

Posts : 11 Join date : 2013-03-10

I have a 09 700 just installed a alba 734 big bore.i have to hold my hand over the throttle body to make it start.Plus it turns over hard and kicks back.any ideas.my other mods are thanks mike
Hot cam stage 2
K&n air filter
exhaust end cap removed
25in mudlite tires
hot rod sheeve
msd charge

Did you get the cam decompression mechanism installed properly. It can be a pain.

yep,easy to get decompression in backwards...

Posts : 11 Join date : 2013-03-10

yea decompression is working I installed the cam a year ago and it has worked fine.till i installed the big bore

Well, then I might venture that your timing might be off by a tooth???
Mine cranks over easy, even with a low battery and a heathy 11:1 piston.

I have had this same problem on my 660 since my new motor. Just thought the higher compression made it harder to start. Now it's lookin like I have problems? Help us out hear guys.

Posts : 11 Join date : 2013-03-10

i have adjusted my timing both ways with no help.

when u put the decompression pin in the cam...the pin should go in when you move the weights out on the cam,when the cam is at rest with the fly weights installed the pin should stick out.

Timing wont help if the decompression pin is installed wrong.

I need some help I guess..... Anyone live in central ohio that's good with these motors!?!? Lol

Posts : 11 Join date : 2013-03-10

I gave up on it for the night. I will pull the cam tomorrow after work and see if its right.

go on you tube and search for: raptor 700 can install.... there is a part 1 and a part 2, it helped me.... hope you get it man.

I have the same issue with mine. Cold starts it fires right off. Once it's at running temp, it spins about 5-10 seconds before it bearly fires off. And it did this before and after cam install.

Posts : 11 Join date : 2013-03-10

turns out the decompression pin was installed right. the spring was unhooked from the wieght so it was holding the pin in. fires right up now.

Bam!
Glad you got it fixed. Good job!

Posts : 789 Join date : 2013-03-10 Age : 70 Location : oHio

Phew!

I still need help! James how much would you charge me if I dropped off my rig and you go threw the motor and fix it and tune it for me?

nice!!

nice glad ya got it

CamoRhino660 wrote:: I still need help! James how much would you charge me if I dropped off my rig and you go threw the motor and fix it and tune it for me?

That's exactly what you need to do,then you will be ready to ride!

It may be the only way to get those hard earned ponies freed up.

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