base timer

[modsrx]

anyone already have problem with base timer on a johnson

 

[Joe Reeves]

Re: base timer

That's a common problem. Year, horsepower, problem?

 

[modsrx]

Re: base timer

sorry its a 200 hp gt 1988 johnson.. what will do the motor if its bad

 

[Joe Reeves]

Re: base timer

If it sticks, then releases, the engine will hesitate and possibly die out. If it sticks and does not release, the spark stays retarded. If one of the six sensors are bad, the related cylinder will have no spark.

Now, are you going to tell us what kind of problem you're having?

 

[modsrx]

Re: base timer

well i ask about it cause i did all the johnson place in my area and know one can solved my mystery problem...after you run in midrange rpm for 3 or 4 min after you start the engine beggin to make alots of detonation ...something creates alots of heat in the head chamber to creates that detonation... i try to let the engine run cooler and it doesnt work i try to retard the timming and it didnt help ... the only thing left in my mind is that someone shaved those heads to raise that compression so it create to mutch heat.... now i try to figure out the oem compression and the squish of it ..squish is the space bettween head and top piston on the top side piston went the piston is at tdc ... you measure that with solder.. you insert that in spark plug till u in the wall same way of the wrist pin and than you squeeze it with piston ... the gap you get they call that "squish" dont know where to call to get the original one ....

 

[Joe Reeves]

Re: base timer

After reading your last post, I believe that you have also been contacting me via email. The compression on that model is usually 95 psi on on bank and 90 psi on the other. Anything higher than then is inviting pre-ignition.

 

[modsrx]

Re: base timer

thnx thats solved my problem why all that detonation ... ill bring those head too my friend and cut those squish band and maybe pot inside the heads

 

[Gary H NC]

Re: base timer

mmmm?

 

[modsrx]

Re: base timer

thnx joe ... i wish i could see that 2 years ago lolll..i was not that good in 2 stroke 2 years ago and i ask u the same question but now with your help again i found my problem ....those head are so shaved that its not possible for water to circulate inside the heads lolllll..... jesus how come i mist that 2 years ago those heads cost me a set of piston and alots of machine shop work grrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrr....)) i am happy anyways really appreciate