83 to 90 marathon parts swap?

bfdaddy · 08-08-2011, 04:49 PM

Just picked up a 1990 2cycle and was wonderin if its possible to switch the clutches. I know there is a difference but will it work. Oh the 90 has a bad motor.

cincinnati_kid · 08-08-2011, 05:21 PM

Sorry I can't answer your question but If you end up not being able to use it and you are interested in selling it let me know how much you would want for it. I am in need of a clutch. good luck

madoc1 · 08-08-2011, 08:25 PM

Quote:

Originally Posted by bfdaddy

Just picked up a 1990 2cycle and was wonderin if its possible to switch the clutches. I know there is a difference but will it work. Oh the 90 has a bad motor.

we need more info. which clutch are you trying to change. from which to which?

bfdaddy · 08-08-2011, 08:50 PM

Use the drive clutch from the 90 and put ot on the 83. They both look the same but 88 is the switch over year. Will it work?

madoc1 · 08-09-2011, 05:27 AM

bf, the parts catalogues show two different clutches for those years. you might ask dave or brew what the difference is and if it would work. they sure look the same.

Dave Box · 08-09-2011, 07:24 AM

So you want to put a 3PG clutch onto a 2PG engine. Well the honest answer is that I don't know as I have not done it (and I like my answers to based on having actually done the job myself). That said I can tell you that the crankshaft is the same diameter so the clutch will physically fit and you have nothing to lose by giving it a go.

Dave

BrewCityMusic · 08-09-2011, 08:36 AM

Well, I TRIED to do some research but I came up with 2 different part numbers (as Madoc stated the 88-down is 23192G-1 and the 89-up is either 23817G-1 or 26952-G01) and the pics I've seen show that they indeed look a bit different (at the rear of the clutch) but I'm leaning towards Daves theory, if the crank dimensions are the same then considering the engine specs RE RPM, etc are similar, you should be fine provided it mounts up straight and secure. My concern would be that the starter pulley may be a bit different (it looks a bit wider on the newer style) but if that's the case, I wouldn't see why you couldn't remedy that with a pulley and belt swap or adjustment ...

Let us know how it goes, this is a good one for all of us to know!

Dave Box · 08-09-2011, 08:47 AM

Perhaps I should reiterate that my advice is based on already having the parts so the experiment will be zero cost. I would certainly not advocate buying the wrong clutch but the crankshaft chamfer is the same so if they look similar I would go for it.

Dave

bfdaddy · 08-09-2011, 06:56 PM

O k whats the secret to remove the clutch. The 83's center bolt isnt breakin loose.

Dave Box · 08-09-2011, 07:28 PM

The secret is probably using an impact wrench. That is a long bolt that drives into the crankshaft and may well be cold welded in after 28 years. You will not be able to get any rust buster in there and if you use an extension on your wench you may well shear the bolt. Gently does it.
Dave

08-08-2011, 04:49 PM	#1
bfdaddy Not Yet Wild Join Date: Dec 2010 Location: Athens, GA Posts: 30	83 to 90 marathon parts swap? Just picked up a 1990 2cycle and was wonderin if its possible to switch the clutches. I know there is a difference but will it work. Oh the 90 has a bad motor.

08-08-2011, 05:21 PM	#2
cincinnati_kid Getting Wild Join Date: Jul 2011 Posts: 110	Re: 83 to 90 marathon parts swap? Sorry I can't answer your question but If you end up not being able to use it and you are interested in selling it let me know how much you would want for it. I am in need of a clutch. good luck

08-08-2011, 08:50 PM	#4
bfdaddy Not Yet Wild Join Date: Dec 2010 Location: Athens, GA Posts: 30	Re: 83 to 90 marathon parts swap? Use the drive clutch from the 90 and put ot on the 83. They both look the same but 88 is the switch over year. Will it work?

08-09-2011, 05:27 AM	#5
madoc1 no clue Join Date: Sep 2009 Location: spicewood, texas Posts: 3,308	Re: 83 to 90 marathon parts swap? bf, the parts catalogues show two different clutches for those years. you might ask dave or brew what the difference is and if it would work. they sure look the same.

08-09-2011, 07:24 AM	#6
Dave Box Respect the Cart Join Date: May 2010 Location: Rocky Mount, Virginia Posts: 2,190	Re: 83 to 90 marathon parts swap? So you want to put a 3PG clutch onto a 2PG engine. Well the honest answer is that I don't know as I have not done it (and I like my answers to based on having actually done the job myself). That said I can tell you that the crankshaft is the same diameter so the clutch will physically fit and you have nothing to lose by giving it a go. Dave

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08-09-2011, 08:36 AM	#7
BrewCityMusic Hammer Down !!!! Join Date: Jun 2010 Location: Lake Geneva, WI Posts: 2,681	Re: 83 to 90 marathon parts swap? Well, I TRIED to do some research but I came up with 2 different part numbers (as Madoc stated the 88-down is 23192G-1 and the 89-up is either 23817G-1 or 26952-G01) and the pics I've seen show that they indeed look a bit different (at the rear of the clutch) but I'm leaning towards Daves theory, if the crank dimensions are the same then considering the engine specs RE RPM, etc are similar, you should be fine provided it mounts up straight and secure. My concern would be that the starter pulley may be a bit different (it looks a bit wider on the newer style) but if that's the case, I wouldn't see why you couldn't remedy that with a pulley and belt swap or adjustment ... Let us know how it goes, this is a good one for all of us to know! Last edited by BrewCityMusic; 08-09-2011 at 08:37 AM.. Reason: Typing faster than my coffee intake justifies this morning

08-09-2011, 08:47 AM	#8
Dave Box Respect the Cart Join Date: May 2010 Location: Rocky Mount, Virginia Posts: 2,190	Re: 83 to 90 marathon parts swap? Perhaps I should reiterate that my advice is based on already having the parts so the experiment will be zero cost. I would certainly not advocate buying the wrong clutch but the crankshaft chamfer is the same so if they look similar I would go for it. Dave

08-09-2011, 06:56 PM	#9
bfdaddy Not Yet Wild Join Date: Dec 2010 Location: Athens, GA Posts: 30	Re: 83 to 90 marathon parts swap? O k whats the secret to remove the clutch. The 83's center bolt isnt breakin loose.

08-09-2011, 07:28 PM	#10
Dave Box Respect the Cart Join Date: May 2010 Location: Rocky Mount, Virginia Posts: 2,190	Re: 83 to 90 marathon parts swap? The secret is probably using an impact wrench. That is a long bolt that drives into the crankshaft and may well be cold welded in after 28 years. You will not be able to get any rust buster in there and if you use an extension on your wench you may well shear the bolt. Gently does it. Dave

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