kick back when trying to pull start my 25hp

[bigscott]

Hi guys im hoping you can help.

I have a 25hp 2 stroke. When I try to pull start the engine I get about halfway and the flywheel just stops turning. I spoke to a guy over the weekend who reckons this is a common problem with older engines and theres nothing I can do about it apart from slowly pulling the pull start all the way out and trying again. IT happens a good few times before I get the engine going.


Any idea's?

OH forgot to say, the problem is become more common the more I use it

[PeterM]

Sounds sort of normal for pull starting. I have (I think) the same engine and it just needs a really good pull.

The modern motors have all sorts of fancy things to reduce the compression on pull starting but I think you are just feeling the cylinder compress as it comes up the stroke - just before they go 'pop' and the motor starts.

The solution is I think just pull harder......

I'm starting mine on Sat morning - if I remember I'll video it ...

[bigscott]

Aahh thanks for the quick reply PeterM its good news to know its not dying on me (hopefully)

It seems to happen regardless of how hard I pull so im going to buy a new pull cord and carry a backup just incase

[Ian M]

When I was first instructed in the noble art of swinging an engine, I was told to turn the engine until I felt it come up to compression (ie felt a resistance on the pull cord - you can experiment by pulling it past this point and see if the resistance suddenly reduces significantly; it has then gone past TDC) let the recoil mechanism recover the pull cord fully in, and then pull for all you are worth Sorry if I am instructing you in egg sucking

[bigscott]

sounds Good Ian So it could very well be down to my technique aswell ( don't tell the wife )

[Ian M]

we'll keep it to ourselves shall we?

[uncle al]

it sounds like it is the timming advancing ,it hurts like hell

[bigscott]

Yes it Does!!!! especially 2 or 3 times in a row. How would I go about changing the timming or is this a job best left to the experts

[uncle al]

just have the throttle in the tickover position then pull to start if it still does kick back you will have to find either a linkage fell of somewhere or it could be stuck/siezed in the advanced position, if it is electric advance the ecm may be faulty, tick over to fast ther you are something to keep you out of mischief good luck

[bigscott]

Cheers Uncle Al Ive had a quick look at the manual for checking and changing the timming. Lots of tinkering coming up