1971 100hp point gap

[toey77]

hi there needing some info on what the point gap should be set at for the mentioned motor (1971 100hp) i do have a manual but as our house is for sale and we are getting ready to move my lovely wife had packed the cd that i bought with a manual on it and has know idea on where she put it, so i am hoping to get the answer here, as i thought it was the amplifier but was told to check my points (thanks to Iboats Brains) and found there is barely a visible gap am hoping this gets me going and then i have a complete second motor i bought for the electrical's still on stand by

 

[dkonrai]

Re: 1971 100hp point gap

gap should be about .20

 

[toey77]

Re: 1971 100hp point gap

gap should be about .20

sweet thanks mate

 

[boobie]

Re: 1971 100hp point gap

New points should be set at .012 ". Old points .010 ".

 

[toey77]

Re: 1971 100hp point gap

New points should be set at .012 ". Old points .010 ".

thanks a heap for the information greatly appreciated, whys is there a difference between old and new, new to marine motors but not new to 2 strokes (dirtbike) and haven't ever heard of this so very curious as to know why

 

[boobie]

Re: 1971 100hp point gap

New points have to be broken in. After the rubbing block on the points gets broken in they are considered old points. It's mainly a rubbing block thing.

 

[toey77]

Re: 1971 100hp point gap

New points should be set at .012 ". Old points .010 ".

just been thinking that is a very small gap they have in opening just cuase i am used to cars or bikes that can run good to.019

 

[Tim Frank]

Re: 1971 100hp point gap

gap should be about .20

????

You probably meant .020.....but that is still wrong.

 

[dkonrai]

Re: 1971 100hp point gap

????

You probably meant .020.....but that is still wrong.

i am sorry, thanks for the correction.

 

[boobie]

Re: 1971 100hp point gap

The specs I gave you are out of the service manual. And from experience.

 

[Tim Frank]

Re: 1971 100hp point gap

^^^^^ that's the number...

 

[Joe Reeves]

Re: 1971 100hp point gap

(Point Setting Of Battery Capacitance Discharge)
( Ignition Models - 1968 thru 1972)
(Some have points - Some do not)
(Joe Reeves)

The points must be set to .010 but no wider than .010..... BUT in some instances due to a possible slight inaccurately machined crankshaft lobe or a slight offset of one set of points, a setting slightly less than .010 would be required as follows.

Whether the crankshaft has two or three lobes, when setting the points, check the setting of the points on each individual lobe by rotating the crankshaft by hand.

You may find that setting one set of points to .010 on one lobe, then turning the crankshaft to the next lobe, the gap measures .011 or .012 (too wide). This is where you would need to close that gap down to the required .010. A gap too wide can result in a ignition miss when throttle is applied.

Bottom line, pertaining to the point setting at the various lobe locations____ .010, .010, .009, is okay____ .010, .010, .011 is not!

 

[toey77]

Re: 1971 100hp point gap

The specs I gave you are out of the service manual. And from experience.

I was sure that's where you got them but you seem quite knowledgeable so i though id ask bought the gap cause i was just going by my experience with cars and bikes, best way to understand is to ask, not meaning to offend just acquiring knowledge myself, and appreciate the help

 

[toey77]

Re: 1971 100hp point gap

(Point Setting Of Battery Capacitance Discharge)
( Ignition Models - 1968 thru 1972)
(Some have points - Some do not)
(Joe Reeves)

The points must be set to .010 but no wider than .010..... BUT in some instances due to a possible slight inaccurately machined crankshaft lobe or a slight offset of one set of points, a setting slightly less than .010 would be required as follows.

Whether the crankshaft has two or three lobes, when setting the points, check the setting of the points on each individual lobe by rotating the crankshaft by hand.

You may find that setting one set of points to .010 on one lobe, then turning the crankshaft to the next lobe, the gap measures .011 or .012 (too wide). This is where you would need to close that gap down to the required .010. A gap too wide can result in a ignition miss when throttle is applied.

Bottom line, pertaining to the point setting at the various lobe locations____ .010, .010, .009, is okay____ .010, .010, .011 is not!

now that sets it straight for my brain thanks, ohh i am missing my manual

Thanks