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Timing Issue - Need some help!

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91NaughtyQ View Drop Down
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    Posted: August-08-2019 at 3:07pm
Hey guys. In short the boat hasn't been idling as smooth as it should be (or used to be) I checked the timing and it is pretty far off. I tried adjusting it with my light, but I can't get it back in time before the engine just shuts off. What am I missing - Basically what are the steps I need to take.    91 Nautique - 351 PCM - PRO TEC (Retro Kit installed 3 years ago)
658 hours. I have looked through the various threads and can't seem to figure it out. Any help is greatly appreciated.

Also could my timing light be jacked up? Is there a way to test that?

Gary
1991 Ski Nautique
(Previous)1984 Ski Nautique 2001
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Post Options Post Options   Thanks (0) Thanks(0)   Quote KENO Quote  Post ReplyReply Direct Link To This Post Posted: August-08-2019 at 3:21pm
You must be trying for something around 10 degrees BTDC. at idle

What do you have for timing right now
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Post Options Post Options   Thanks (0) Thanks(0)   Quote 91NaughtyQ Quote  Post ReplyReply Direct Link To This Post Posted: August-08-2019 at 3:50pm
Right now the mark for 10 degrees BTDC is about 3 or 4 inches to the right of the post. Not even near the marks by my light. Should it be 10 BTDC at 600 RPM?
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Post Options Post Options   Thanks (0) Thanks(0)   Quote KENO Quote  Post ReplyReply Direct Link To This Post Posted: August-08-2019 at 3:53pm
Originally posted by 91NaughtyQ 91NaughtyQ wrote:

Right now the mark for 10 degrees BTDC is about 3 or 4 inches to the right of the post. Not even near the marks by my light. Should it be 10 BTDC at 600 RPM?


10 at 600 sounds good

Are you on the #1 cylinder (the front right)?

If you're on the front left you're making believe it's a Chevy   

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Post Options Post Options   Thanks (0) Thanks(0)   Quote 91NaughtyQ Quote  Post ReplyReply Direct Link To This Post Posted: August-08-2019 at 4:02pm
If I am facing the motor (belts toward me) it is the front right #1 correct?
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Gary S Quote  Post ReplyReply Direct Link To This Post Posted: August-08-2019 at 4:09pm
no front left then
69 Mustang HM SS
95 Nautique Super Sport
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Post Options Post Options   Thanks (0) Thanks(0)   Quote KENO Quote  Post ReplyReply Direct Link To This Post Posted: August-08-2019 at 4:26pm
Just to be sure

A picture's worth a thousand words

For your normal rotation engine


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Post Options Post Options   Thanks (0) Thanks(0)   Quote MrMcD Quote  Post ReplyReply Direct Link To This Post Posted: August-08-2019 at 4:59pm
On V8 engines one cylinder head is always forward of the other.
Looking down at the engine from the front top determine which head is most forward.
It will be about 1" forward of the other head.

Your Number 1 cylinder is always in the forward bank/Head on any V8 engine.
In the post above for the Ford, cylinders 1234 are 1" forward of the 5,6,7,8 cylinders in reality even though the pic shows them even.

Knowing this will let you find number one even if you don't know if it is a Ford or Chevy!
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Post Options Post Options   Thanks (0) Thanks(0)   Quote 91NaughtyQ Quote  Post ReplyReply Direct Link To This Post Posted: August-08-2019 at 5:13pm
Originally posted by Gary S Gary S wrote:

no front left then

Let me test again. Not being on 1 is probably going to be an issue.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote 91NaughtyQ Quote  Post ReplyReply Direct Link To This Post Posted: August-08-2019 at 5:29pm
Damn you boys are smart. Dialed in 10 degrees BTDC purring like a kitten! Can't thank you guys enough!!

Gary
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Post Options Post Options   Thanks (0) Thanks(0)   Quote KENO Quote  Post ReplyReply Direct Link To This Post Posted: August-08-2019 at 5:33pm
So your timing light was just fine and the only thing jacked up was you

Hate it when that happens
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Post Options Post Options   Thanks (0) Thanks(0)   Quote 91NaughtyQ Quote  Post ReplyReply Direct Link To This Post Posted: August-08-2019 at 5:41pm
Originally posted by KENO KENO wrote:

So your timing light was just fine and the only thing jacked up was you

Hate it when that happens


Guilty as charged sir! Thankful for you guys for sure. I told my wife (again) let me post to the forum I am sure it is something simple. They will get me straight.

Gary
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Post Options Post Options   Thanks (0) Thanks(0)   Quote KENO Quote  Post ReplyReply Direct Link To This Post Posted: August-08-2019 at 5:51pm
It's a good thing you've got a sense of humor
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