Recommendation on setting timer

[Andre]

I posted earlier about a problem I had with my 90HP and determine the problem was a new stator and timer base. My question now is whether I need to perform a timer adjustment? The motor seems to run great as-is and if I don't perform the tune up, what effects if any will happen if I leave it alone.

Your opinion is always appreciated.

Andre

 

[Seasport]

Re: Recommendation on setting timer

I'd definitely check the timing. If the timing is too far retarded you won't be developing full power. Too far advanced and you risk damaging the powerhead.

 

[Andre]

Re: Recommendation on setting timer

I agree that bad timing could cause some problems if left alone but how far off could the timing be if I removed and installed the new one without make any adjustment chages (everything was put back in place exactly the same as before I started).

If I had the timing light I wouldn't give it much thought but seeing as it runs like a kitten and the gas consumption is better now than before I was hoping to just leave it alone.

 

[KYHunter2]

Re: Recommendation on setting timer

If you like to gamble, then go for it.

As told, you can do SERIOUS DAMAGE , if its not correct.

If you want to eliminate the possibility , of a powerhead rebuild/scrap.

Set the timing correctly.

KYHunter

 

[Seasport]

Re: Recommendation on setting timer

It only takes a few minutes to check the timing but you need to do it at WOT under load which means you either have to hang (carefully) off the back of the boat at full speed or you can back the boat into the water and check it with the boat securely fastened to the trailer and the motor in gear.

Joe Reeves has also published a method of setting the timing without running the motor which gives good results.

Maybe you could borrow a timing light - they're not too expensive to buy.

 

[Silvertip]

Re: Recommendation on setting timer

I believe Auto Zone has a tool loan program. Haven't had a need for it but they probably need a deposit which is returned when you bring back the tool. The reason for checking timing is two-fold. 1) How do you know it was right with the old one, and 2) no two parts in the ignition system can be made 100% identical. This is why timing is adjustable in the first place since it is a critical adjustment. Are the parts close to identical? Certainly -- but that does not mean they are close enough to forget about checking timing. It's your engine and your money. You either take a chance that it's right or pay the piper if its not. If you don't have a service manual for your engine you be advised that this is the best investment you can make if you work on your own engine. It saves time, helps prevent costly mistakes, and of course cuts down the amount of typing we need to do. d