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Forum: Engines & props 01 April 2018, 19:21
Replies: 12
Views: 6,033
Posted By Lee1
So is the bore/cc on the 4hp 6eo outboard already...

So is the bore/cc on the 4hp 6eo outboard already running at its maximum fuel air compression with no way of getting more power by re-jetting the original carb?
Forum: Engines & props 31 March 2018, 18:09
Replies: 12
Views: 6,033
Posted By Lee1
Yamaha 4hp restoration and derestrict to 5hp

The steering bracket fitted, half a kilo of corrosion wire brushed off and in primer ;)[ATTACH]124048
Forum: Engines & props 29 March 2018, 23:27
Replies: 12
Views: 6,033
Posted By Lee1
Yamaha 4hp restoration and derestrict to 5hp

I think your right as I can't find a 5hp 6eo on searches, I guess the 4hp was the 4hp block at that that time so no upgrade will work, I did see on diagrams that the bigger later 5hp block used the...
Forum: Engines & props 29 March 2018, 19:34
Replies: 12
Views: 6,033
Posted By Lee1
Yamaha 4hp restoration and derestrict to 5hp

The restoration is a 4AC 6eo the donor is a 5cs 6m3
If it don't bog down with the 5 carb then it's all good yes? if the bore is smaller on the 4 it will bog down no?
Forum: Engines & props 29 March 2018, 19:31
Replies: 12
Views: 6,033
Posted By Lee1
Yamaha 4hp restoration and derestrict to 5hp

I've checked the carbs, the 4 intake is a lot smaller than the 5 I've not run it with the 5 carb yet but will do as soon as I've finished the overall restoration. The carbs are exactly the same? I...
Forum: Engines & props 29 March 2018, 19:00
Replies: 12
Views: 6,033
Posted By Lee1
Yamaha 4hp restoration and derestrict to 5hp

Your in luck there is one with the handle and one without both thread bars are good condition, I take it you mean the transom screw thumb clamp yes, these are the non bolt type so I will have to fold...
Forum: Engines & props 29 March 2018, 18:53
Replies: 12
Views: 6,033
Posted By Lee1
Yamaha 4hp restoration and derestrict to 5hp

Will have a look to see if I have the 4 I'm not sure I do. . . .
Forum: Engines & props 29 March 2018, 15:30
Replies: 12
Views: 6,033
Posted By Lee1
Yamaha 4hp restoration and derestrict to 5hp

Happy Easter all!
With the poor weather forecast all weekend I've decided to finish a last few projects before the season starts and my spare SIB outboard is first up. . .
I picked up a 4hp yam...
Showing results 1 to 8 of 8

 


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