Tohatsu 6 hp change to 9,8 hp

[taisto]

We here in Finland are sold Tohatsu 9.8 hp 2 cyl. strangled 6 hp.

This is the same engine, the differences probably can be found in carburator, I guess.

Which parts of the from that carburator to be changed, the lifting power to succeed.

Spare part drawing, the difference is only main jet, or a different size carburators throttle.

Or is it easier to make a 6 hp to 8 hp.

Information prior to giving thanks to Taisto in Finland.

 

[pvanv]

Re: Tohatsu 6 hp change to 9,8 hp

No, sorry to say you can't.

The 4/5/6 is a one-cylinder family; The 8/9.8 2-cylinder family is a different block. You can bump a 4 to a 6. Likewise, you can bump an 8 to a 9.8. But you cannot carb the 1-cylinder to perform like a 2-cylinder.

 

[taisto]

Re: Tohatsu 6 hp change to 9,8 hp

So this is my 6 hp 2-cyl.

I think there is the same machine than 9.8 hp.

This is the type of 4-STROKE MFS6A3Z S and

9,8 hp type is 4-SROKE MFS9.8A3 S

Here is a link to the Finnish site, sorry in Finnish:

http://www.tohatsu.fi/index.php?sivu=4-tahti&teho=6.0&malli=S&rec_id=99

I mentioned cylinder cubic engines are the same.


In what way different from the 8 hp then 9.8 hp?

 

[TOHATSU GURU]

Re: Tohatsu 6 hp change to 9,8 hp

Same frame, different block. You could do it, but it wouldn't be cost effective.

 

[taisto]

Re: Tohatsu 6 hp change to 9,8 hp

After all, there is the same in both the cylinder block.

- Number of cylinders is 2
- Cylinder capacity is 209 cm?.
- Stroke x bore is 59 x 44


How can it be a different block?

These same data can be found in both types of machine technical information.

 

[TOHATSU GURU]

Re: Tohatsu 6 hp change to 9,8 hp

The blocks have different porting. Look at the parts book and compare the part numbers.

 

[taisto]

Re: Tohatsu 6 hp change to 9,8 hp

Yes, I noticed no difference in the numbers of spare parts.

Apparently, then so be it.

 

[TOHATSU GURU]

Re: Tohatsu 6 hp change to 9,8 hp

The part numbers are different.
9.8 = 3K9B011001M
6 = 3B2B011002M