The differences between Chrysler 140HP and 130HP ?

[Mr. Grey]

Hello@all,
I use a good old '78 140HP Chrysler and it runs very well. Now I could buy a cheap '73 130HP for spare parts, but what are interchangeable between them?
Thanks for the help.
Frank

 

[Frank Acampora]

Re: The differences between Chrysler 140HP and 130HP ?

The 73 and 78 may have different lower units--right around 78 Chrysler developed the one piece lower unit. If both are two piece lower units with a thrust pin, then everything is swappable. The two piece lower is not interchangeable with the one piece lower and no parts will swap between them.

HOWEVER: One caveat. The 140 is a 3.375 bore by 2.875 stroke. The 135 is definitely a 2.80 stroke (shorter than the 140) and bore is 3.375, just like the 140. You can certainly replace the whole block and if both are distributor drive, parts of the ignition. If the 78 is Prestolite, then the whole ignition system including flywheel needs to be swapped since it operates differently than the distributor system.

Cranks can be swapped but port timing will change because of the different stroke--but the engine will still make usable power, just not as much.

EDIT: How did I read 135? The 130 is (I think) a 2.80 by 3.3125 engine Other than that, all the rest applies.

 

[Mr. Grey]

Re: The differences between Chrysler 140HP and 130HP ?

Thanks a lot for this quick and helpfull informations, so I would'nt buy this engine.

I have time enough to wait for another 140hp model with more interchangeable parts.

This old boating Dino's are very unsought today here in Germany about the "polutions" and the
"enormous" fuel consumption . The "normal" people don't realized the complete and real costs
(include servicing) about a new 4stroker over it's livetime.

I would never buy so an expensive, unselfserviceable and heavy computerized engine and I like my
"Big white Fridge". A little goodie is: no one want to steal this oldie. Sometimes new and atractive
engines are chopped away overnight with a chainsaw (!!!), include parts from the stern...

During the last year I found some nice spareparts: a complete new leg with gear, carburators, 2x Ignition's
an a lot more.

Please, can you tell me a good matching propeller for a light and fast hull ?

Kind Regards
Frank

 

[Mr. Grey]

Re: The differences between Chrysler 140HP and 130HP ?

Thx....

 

[Frank Acampora]

Re: The differences between Chrysler 140HP and 130HP ?



A 140 with a small light hull will use a 13 X 21 prop. If the RPM still goes over 5500, then that prop can be cupped or you can step up to a 23 pitch--if you can find one.

The first photo is of my `140 with a 1 piece lower unit on a 21 foot cuddy cabin. This engine uses a 13 X 19 pitch prop and for water-skiing it uses a 13 X 17 prop. In the photo, it has a 13 X 23 bronze Mercury racing propeller.

Just for illustration, the last two photos are of a Force 125 on a 14 foot flat bottom hull.The Force 125 is very similar to the Chrysler 140. That is why I can use it for comparison. This engine uses a 13 X 21 prop and turns 5900 RPM at 60 MPH. This does vary with prop brand: A Ballistic 13 X 21 stainless loads down the engine to about 4700 RPM, but because of increased efficiency (of the prop) speed still remains at 60 MPH. (88KPH?)

SO, a 13 X 21 is a good starting point but you must still experiment.

And yes,I agree. When you can buy an engine very cheaply, total operating cost does go down. It takes a lot of gas saved to make up for the cost and depreciation of a newer engine.