what is the difference from a 260 crank to a fishing motor crank

**camaro7081** · 02-09-2007, 07:25 PM

whats the difference????????? i have a non oiler crank from a 2.0 (top crank measurement is 1.5 inch,the same measurment as my old 260 crank)) will this hold up to the rpm's if not how many rpm's is this crank good for ?????

**MTOLLEY** · 02-09-2007, 07:41 PM

far as i know there the same. someone with more crank knowledge will chime in soon. mt

**jphii** · 02-09-2007, 07:48 PM

Depending on who you are buying it from it could be over a grand.

**camaro7081** · 02-09-2007, 08:12 PM

Originally Posted by jphii

Depending on who you are buying it from it could be over a grand.

i own the crank . i bought a 150 parts motor a few years ago . and the crank is good (non oiler) is it the same as the 260 crank ???????? the top bearing surface measures the same as my 93 260 crank (which needs work)

**dez nuts** · 02-09-2007, 08:32 PM

They are different if you have a 150hp non oil injection crank it is a bottom guided crank and the center mains are different make sure you check that becuase they are several different centers some cranks have a lip on them that support the bareing and some are flat if you use the wrong one it will take out the bareing.if you had a 93 260 it is a top guided crank and your 150 crank is bottom guided so i think the centers are smaller on your 150 crank.hope that helps keys dave

**gselite2000** · 02-09-2007, 10:05 PM

Ruck told me the fishing motor crank will not hold up as well as the 260 hipo crank. Apparently there is additional bead blasting, or something, that occurs between machining processes for the hipo cranks that the other cranks do not get.

He was very adament that they are not the same. I was also thinking of using an oiler crank...but I listen to Ruck.

Scott

**T-REX** · 02-10-2007, 09:50 AM

I won't argue about tha metal in tha differnt cranks, kuz I ain't a metal specialist, but I have put 2.0 fish'in cranks in 260's that have seen rpm'z over 10K, and I now have a F1 2.0 mota with a 2.0(oiler crank) and it will turn 11.5K!!!.....I personally kan't see mercury use'in differnt metals in differnt cranks, but what da hell I no.....Tha metal question would be a good one for Cy!!!!......Oh, and I have top guide rods in tha lil F1 mota, on a crank that had bottom guide rods!!!.....But maybe junkyard mota's live by differnt rules!!!

**dez nuts** · 02-10-2007, 10:03 AM

it will as long as you use the right center mains.

**hydroholic** · 02-10-2007, 11:32 AM

Originally Posted by T-REX

I won't argue about tha metal in tha differnt cranks, kuz I ain't a metal specialist, but I have put 2.0 fish'in cranks in 260's that have seen rpm'z over 10K, and I now have a F1 2.0 mota with a 2.0(oiler crank) and it will turn 11.5K!!!.....I personally kan't see mercury use'in differnt metals in differnt cranks, but what da hell I no.....Tha metal question would be a good one for Cy!!!!......Oh, and I have top guide rods in tha lil F1 mota, on a crank that had bottom guide rods!!!.....But maybe junkyard mota's live by differnt rules!!!

I have ran the crank and rod scenario you have in your F1 mota as well and had no problems.As far as the metal that the cranks are made out of I don't know either but I have ran some stock fishin mota cranks in the hi-po's as well and turned them hard and they lasted.The Bidgeport on my Vector currently has a crank out of a 1980 2.0 150 in it and it gets twisted pretty damn hard (close to 9000 quite often).No problems so far and its fixin to start its fourth summer!Hydro

**T-REX** · 02-10-2007, 04:50 PM

it will as long as you use the right center mains.

Yea, tha tricky part iz tha bear'inz...Ain't reely tricky, juss gotta remember to look for tha shoulders(late 2.5 cranks) and tha non-shouldered cranks(old stuff)...Juss like tha top bearings...I have turned down tha top ov tha crank and put ball bearinz on it....Theyz bear'inz readily avalible ta use any crank in any mercury, it'z juss a matter ov know'in which ones U need....once ya see tha differnce in tha shouldered crank and tha non shouldered, it'z a piece ov cake!!!

**gselite2000** · 02-12-2007, 11:07 PM

I am going to do whatever Brendon Power tells me is ok to do. I will run this by him and see what he says.

I am not the experimental type. Can't afford it. After blowing up my last one after 6 hours of breakin time, I am almost scared to crank my engines, much less experiment with possibly using the wrong crank.

Scott

**T-REX** · 02-13-2007, 08:36 AM

much less experiment with possibly using the wrong crank.

Thats tha hole point ov these reply's...THERE IZ NO WRONG CRANK!!...They will all work...it's the bearings that are differnt!!!.....but I understand ya position!!!

**camaro7081** · 02-13-2007, 02:03 PM

i would guess that if you are using a 2.0 crank , order the bearings for the 2.0 crank . or if you take the crank out of a motor and the bearings are good ,just use the bearing that are on the crank already. and there should be no problems, no matter what motor you put the crank into ?????? i would say if you find a crank or buy one from someone then you really need to know the difference , i guess the bottom line is match the crank with the right bearings and you should be good to go no mater what engine it goes into . am i right ????????? if not let me know !!!!!!!! thanks

**camaro7081** · 02-13-2007, 02:05 PM

ruck told me that the hi po cranks are shot peened . i understood that the metal is the same

**T-REX** · 02-13-2007, 04:52 PM

i would guess that if you are using a 2.0 crank , order the bearings for the 2.0 crank . or if you take the crank out of a motor and the bearings are good ,just use the bearing that are on the crank already.

NO!!!

If U use a 2.0 crank in a 2.5, U have to use 2.5 bearings......If U use a 2.5 crank in a 2.0/2.4 U have to use the 2.4 bearings that don't rub the crank shoulder!!!...I don't know the numbers....

Tha only reason U have to use 2.5 bearings wit 2.0/2.4 crank in a 2.5 iz kuz tha 2.5 block haz a bigger external bearing diameter!!...Tha crank journal dia. iz the same!!!(we are reffer'in to tha center 2 mains!!)...Lower bear'in iz tha same on both...tha top bear'in iz tha same outside dia, but thers 2 differnt size inside diam...in both older and newer mota'z!!