evinrude specks for rebuild 1957 fleetwin 7.5 hp

[twocyclemania]

Re: evinrude specks for rebuild 1957 fleetwin 7.5 hp

Just my two cents but..... Why not look for a powerhead from a parted out motor. Bolt on an go. You can save yourself a lot of aggravation and cost. Just look around (ebay) and you should be able to get one in the range of $50.00.

 

[tx1961whaler]

Re: evinrude specks for rebuild 1957 fleetwin 7.5 hp

OEM Head gasket is PN 203034 and is list price at $11.50.
Sierra Head gasket is PN 18-2952 and is $8.99
http://www.iboats.com/Head-Gasket-f...5031766--session_id.620655671--view_id.173735

 

[1946Zephyr]

Re: evinrude specks for rebuild 1957 fleetwin 7.5 hp

Just my two cents but..... Why not look for a powerhead from a parted out motor. Bolt on an go. You can save yourself a lot of aggravation and cost. Just look around (ebay) and you should be able to get one in the range of $50.00.

If everything is in spec, it's actually cheaper to re-reing. This way you know what you have. If things look rough, yes this would be a great option. Often times with the Fleetwins, the rods are scorched and pistons scored, then buying a good used powerhead is the best option, but if a guy tears one down and sees that it's good to re-ring, why not?

 

[duckland23]

Re: evinrude specks for rebuild 1957 fleetwin 7.5 hp

Yes I have agree with you . im going to sears or harbor frieght today to get a hone for the cylinders . I got a ring installer today for the rings , Its the one's used on small engines , so I think i can use it on my powerhead pistons ring to install them in the cylinders . I need the smaller hone from 13/4 to 2 7/8 inch hone bore size . A man is going to sell me the rings for 27.00 with shipping . Im unsure if I should buy them from him . The dealer wants 40 dollars for one set of rings . there are three rings on each pistons for a total of six of them . There is some light marks on the pistons but thats noromal wear , the pistons rods seam tight and no play side to side . The crank looks good also too . This engine will be like brand new with new rings . Im going to buy the gaskets from the internet .

 

[rockyrude]

Re: evinrude specks for rebuild 1957 fleetwin 7.5 hp

I know you are all gung-ho on this, but have you checked that the cylinders are still round? If its never been touched before now there's a good chance they are egg shaped.

 

[duckland23]

Re: evinrude specks for rebuild 1957 fleetwin 7.5 hp

No there not , But I never know if someone before me changed the rings Its 50 years old and may have been changed out sometime in the past . They appear nto to be Egg shaped , my fiend looked at it for me and said it looks good for rebuild . I pulled it apart for inspection and found some minor wear on the conecting rod jornonals and main crank bearing ,But minor at that if . So I think the crank is good to go , there's no play in the crank just minor wear . I also think the cylinder bores are ok too . I have to order the parts from evinrude or for on the internet . The rings are 40.00 for the set of 3 rings you need a total of six rings total .

 

[rockyrude]

Re: evinrude specks for rebuild 1957 fleetwin 7.5 hp

You won't see egg shape, will only find it measuring.

 

[1946Zephyr]

Re: evinrude specks for rebuild 1957 fleetwin 7.5 hp

Yea, you'll need an inside micrometer and check the bores for out of roundness.

$40 for a set of rings will buy you the three rings for each piston, so you won't be spending $40 X 6, just X 2 Basically, the rings, head gasket, intake manifold gaskets, bypass cover gaskets, exhaust cover gaskets and carb mounting gasket will get you through the rebuild. You will definately want to replace the lower seal on the drive shaft too.

 

[duckland23]

Re: evinrude specks for rebuild 1957 fleetwin 7.5 hp

I checked them with a caliper and they are in spec's . I could use a inside micrometer to check them , but a caliper will do . My caliper is a starrett is a very good caliper for measuring things . One of the best to use for part measuring . Im waiting for the rings and gaskets for the engine so Im not ready for assembly of the powerhead . Yes your right about the seal on the main drive shaft the one under the power head . I almost forgot to replace that one thanks for reminding me of it .

 

[rockyrude]

Re: evinrude specks for rebuild 1957 fleetwin 7.5 hp

Did your caliper get below the land at the top of the cylinder?

 

[duckland23]

Re: evinrude specks for rebuild 1957 fleetwin 7.5 hp

Yes it did . I have checked it all around the cylinder , The ring are worned out . I pulled one of the old ring to see how worn the old rings are , the end gap is way off anyway and you can clearly see how worn the old rings are anyway . Im more than sure its not egg shaped the bore out . But i'll let my friend check it also too . It looks good to go . I dont see me needing machine work to bore it over size 020 . Im waiting for the parts to come in from evinrude anyway . I ordered the gasket for the head and the lower one to conect the powerhead to the lower unit . I need a touqe wrench in inch pounds or I can convert it to foot pounds . that way I can tourqe the head proper and the crank case as well . If all is well after Im done I should see compression better than Im seeing now ,not no 30 to 40 psi presure in the cylinders . I also waiting for a hone from sears so I can hone the cylinders out . A nieghbor also told me to use some sand paper and sand it down not to use a a hone , it my take off too much metal on the cylinder walls .

 

[1946Zephyr]

Re: evinrude specks for rebuild 1957 fleetwin 7.5 hp

Head bolts will torque at 60 - 84 inch pounds, which is 5 - 7 foot pounds. Smaller screws, no more than 4 foot pounds or 48 inch pounds. I would try to find a torque wrench that goes to inch pounds.

 

[duckland23]

Re: evinrude specks for rebuild 1957 fleetwin 7.5 hp

where do I find a touque wrench in inch pounds . I know sears has on but its 80.00 thats expensive to buy . So I torque the head bolts 60 inch pounds first than 84 inch pounds that same as the other bolts . I checked harbor freight they only sell foot pounds torque wrenchs . I never seen one in inch pounds , just at sears . But like I said they want a small fortune for them . I would not mine finding one for less money .

 

[rockyrude]

Re: evinrude specks for rebuild 1957 fleetwin 7.5 hp

The harbor freight 1/4" torque wrench is inch pounds $19.99

 

[duckland23]

Re: evinrude specks for rebuild 1957 fleetwin 7.5 hp

Ok thanks I just seen that . Now I am going to need something for flat head screw thats snaps on to the torque wrench .Some are screws and There flat head style . So Im going to need a flat head socket . But I may have one , I had the allen key type you snap on your wrench , but Im unsure if I have them for a flat head screw socket . Someone replaced the head bolts with standard bolts not the one's that have the flat head style screws on them . I also have other things that I need to do too . I need to send out a check for one of the members that send me a free fishfinder . I almost forgot to send it out . I had to apololize to him for not sending it out .

 

[Joe Reeves]

Re: evinrude specks for rebuild 1957 fleetwin 7.5 hp

All fixed?

 

[nwcove]

Re: evinrude specks for rebuild 1957 fleetwin 7.5 hp

betya she's running like a top!!

 

[duckland23]

Re: evinrude specks for rebuild 1957 fleetwin 7.5 hp

Im still waiting for the parts from evinrude to come in . No she's not running yet . Im hoping to get her to getter this weekend if posible . The dealer is still waiting for the rings to come in , they have the gaskets , but not the rings . I should see them at the end of the week . After that the fun comes to put her back to getter . Im hoping my compression come's back to normal and that I dont get 40 psi compression like before . I should see around 80 or better for compression , the better it compressing the fuel the more power she will have . I'll let you know how she is doing and how the job is going .

 

[duckland23]

Re: evinrude specks for rebuild 1957 fleetwin 7.5 hp

Hi guys .

I just got the parts from evinrude and am going to put it togetter this weekend . I also bought a ring expander , but I dont like it . I got it from harbor freight for 4.99 . Im having trouble figuring out how to use it , its the red handle one from them . I seen one better by lisle tools , that one looks better to use . I just cant figure out how to use the harbor freight one . My new rings and larger than the old ones you can clearly see this . So with any luck it should run good .

 

[boobie]

Re: evinrude specks for rebuild 1957 fleetwin 7.5 hp

Joe, remember our PM'S ??? Yeah I know, I had to check also. I think it killed a certain "Cat".