Which one is the best engine for C30 ?

[Capt.JDavis]

Atomic 4 - 5411 - M25 or M25XP ?????

I don't mean which one is the stronger but instead i am asking that which one of these ones gives the least amount of headache to their skippers?

Which one/s are the most problematic ones between those.

And after all pros and cons imagine this.
If your engine craps out and if I offer you a free engine from the above list for your boat, which one you'll ask for?

Thanks,

 

[jeepbluetj]

I have an A-4. 'it's a good engine. It's very old. It's gas. It's raw water cooled. The 5411 is (usually) raw water cooled to.


But I'd say the M25 or M25XP is a far better choice. Diesel and much newer. Age of boat will determine what engine, really. I

 

[Stu Jackson]

the M25 or M25XP is a far better choice

Agreed. They are essentially the same engines.

This may be of use:

Engines 101 - The BIGGEST & BEST collection of M25 Series Universal Engine Information on the Internet, plus some M35, too

http://www.c34.org/wiki/index.php?title=Diesel_Engine

 

[Damifudo]

A running engine. My Universal M25XP has been faithful to me.

 

[Gunni]

The advent of small diesels in production boats was a great thing. Beta Marine even makes a diesel replacement for the Atomic 4. I love gasoline engines and have an old gasoline Jd tractor but would not want a gas engine in a boat.

 

[SailormanDan]

I vote for diesel also. If free, the M25XP.

 

[hvbaker]

M25xpb

 

[Stu Jackson]

M25xpb

without the b is better.

 

[womble]

without the b is better.

What does the "B" signify??
How do I know if I have one?

 

[Steve k]

M25XP Is quite the work horse. I cruise at 2k RPM's without the engine even working hard.

 

[fox islander]

M25XP has been very dependable for me. 2 small issues in 9 years of ownership and both my fault. It's easy to maintain. Has some nice features like the fuel air bleed valve and most of the (non-marinized) parts can be bought at a local Kubota Tractor dealership for literally half the price.

 

[Cayennita]

I only have an Evinrude 2 Stroke outboard.

 

[AXEL]

What does the "B" signify??
How do I know if I have one?

I do not know what it stands for but I believe there are either XPA's or XPB's. The B being the newer and latest version. I think they started production late 1990's or 2000. I do know there have been some upgrades with the "B" and parts are readily available.

 

[Stu Jackson]

What does the "B" signify??
How do I know if I have one?

The XPB is a different engine than the XP. There should be a label on your engine stating what it is. You could also try calling Catalina Yachts and asking them what they put in your hull, since I doubt any PO repowered with an inboard engine on your Catalina 25. Good luck.