Year of Engine and timing order/setting

[Thewagen]

I have a Johnson GT150 outboard installed on my boat and I was wondering how I could tell what year the engine was? I'm guessing 1991 becasue that's the year of the boat, but the Johnson engine was installed after the boat was delivered from what I am told by Ranger Inc.. As well, what is the timing order of the engine cylinders and what is the timing setting I need to use?

 

[Snoopy Joe]

Re: Year of Engine and timing order/setting

Whats the model number ?

 

[emdsapmgr]

Re: Year of Engine and timing order/setting

The factory manual for a 1990 150S (XP/GT) model indicates the timing is 28 degrees, plus or minus one degree. It's a good bet the timing spec is the same for a 1991. The model number will identify the real year of the engine. Timing to be set on the #1 and #2 cylinders when the engine is running at 5000 rpm's. You can't set it properly at idle. The flywheel has markings for both #1 and #2 cyls, so that you can make sure neither of the two cyls are set over the factory limit. (timing can vary slightly between cyls.) Not everyone has the ability to set the timing at 5000 rpm's, so you may want to have the dealer set it.

 

[Thewagen]

Re: Year of Engine and timing order/setting

The factory manual for a 1990 150S (XP/GT) model indicates the timing is 28 degrees, plus or minus one degree. It's a good bet the timing spec is the same for a 1991. The model number will identify the real year of the engine. Timing to be set on the #1 and #2 cylinders when the engine is running at 5000 rpm's. You can't set it properly at idle. The flywheel has markings for both #1 and #2 cyls, so that you can make sure neither of the two cyls are set over the factory limit. (timing can vary slightly between cyls.) Not everyone has the ability to set the timing at 5000 rpm's, so you may want to have the dealer set it.

Thanks for the information. I appreciate it. Will give it a go. My Father in law and a friend are basically mechanics since they've worked on cars and boats their whole lives...will use their help to set the timing.

Thanks again.