Help needed to mod a 1980 Johnson V4 85hp

Printable View

Show 40 post(s) from this thread on one page

06-24-2017, 10:13 PM
flabum1017

I have never seen a bubbleback V-4 that the chest was not cut..... just sayin'
06-25-2017, 01:18 PM
spybot

Quote:

Originally Posted by 58Evinrude

Yup, its a prop shaft rated 115, or a crank rated 140. It has the exhaust stuffers, not sure about the reed stuffers, but I do have a set of them. Its been sitting on the rack for so long I don't remember if the exhaust chest is cut. I'm thinking about building it for my 16 Sidewinder Low Pro

well 58Evinrude if you have a spare set i would be willing to buy them from you. Iam struggling to get hold of any here in Scotland
06-25-2017, 01:58 PM
spybot

Ok guys gathering all the info needed for my build. But and its a big BUT
Should i Square of the ports r just leave them as is?
If i leave them as they are Should i remove the "Tits"
Some say Square some say Leave
06-25-2017, 03:28 PM
58Evinrude

Quote:

Originally Posted by spybot

well 58Evinrude if you have a spare set i would be willing to buy them from you. Iam struggling to get hold of any here in Scotland

If I find a spare set you can have them. I'll have to check and see if the 115 has any in it, that might take me a while.
06-25-2017, 04:39 PM
71V153

2 Attachment(s)

Quote:

Originally Posted by 58Evinrude

Seriously, following this thread is giving me ideas. I've got a mid 80's 115, already has the bubble butt, and I was wondering what sort of hp I could get out of it with a say a 6 page mod.

Please correct me if I'm wrong, but I think '85 was the last year for the xflow 140. They detuned it with lower compression (thicker) head gaskets and different jetting. And it became the bubble back 115 (prop rated). Should have the exhaust chest cut, and reed stuffers. Prior to that the 115 was a flat back.

I have a running '79 115 w/good compression on a stand in the craport that I hope to tear into/140-ize soon. Gonna go on the Baja after I hang my 140 on the Speedcraft.
06-25-2017, 04:43 PM
71V153

Quote:

Originally Posted by spybot

well 58Evinrude if you have a spare set i would be willing to buy them from you. Iam struggling to get hold of any here in Scotland

Keep watching Ebay.
06-25-2017, 04:51 PM
flabum1017

Quote:

Originally Posted by 71V153

Please correct me if I'm wrong, but I think '85 was the last year for the xflow 140. They detuned it with lower compression (thicker) head gaskets and different jetting. And it became the bubble back 115 (prop rated). Should have the exhaust chest cut, and reed stuffers. Prior to that the 115 was a flat back.

I have a running '79 115 w/good compression on a stand in the craport that I hope to tear into/140-ize soon. Gonna go on the Baja after I hang my 140 on the Speedcraft.

That '79 115 would be comparable to the later model 90.
06-25-2017, 04:54 PM
flabum1017

Quote:

Originally Posted by 71V153

Keep watching Ebay.

http://www.ebay.com/itm/1978-98-John...pYtF4y&vxp=mtr
06-25-2017, 05:02 PM
71V153

Quote:

Originally Posted by flabum1017

http://www.ebay.com/itm/1978-98-John...pYtF4y&vxp=mtr

Them're purty, but for that kinda money think i'd shop around for a blowed up 140?
06-25-2017, 05:15 PM
58Evinrude

Ya got me curious enough to go check my 115. Its a 91, not mid 80's like I thought. And the exhaust is cut. Just have to pull the reeds out and see if there are stuffers in there. Any idea just what sort of hp I might be able to make from this? I have an early 80's 115 on my Winder now, I know its really a 90 in prop hp.
06-25-2017, 05:15 PM
flabum1017

2 Attachment(s)

Quote:

Originally Posted by 71V153

Them're purty, but for that kinda money think i'd shop around for a blowed up 140?

And if you pay $500 and open it up and find this?

Attachment 378658
06-25-2017, 05:18 PM
flabum1017

Quote:

Originally Posted by 58Evinrude

Ya got me curious enough to go check my 115. Its a 91, not mid 80's like I thought. And the exhaust is cut. Just have to pull the reeds out and see if there are stuffers in there. Any idea just what sort of hp I might be able to make from this? I have an early 80's 115 on my Winder now, I know its really a 90 in prop hp.

Put some tighter heads on it and let er rip
06-25-2017, 05:20 PM
71V153

1 Attachment(s)

Quote:

Originally Posted by flabum1017

That '79 115 would be comparable to the later model 90.

Plan is to cut the chest, hang a bubble butt on, pair of type III carbs w/primer system. Stuffers, if necessary, and screw on some Carson reeds. Add some '78 hi-comp heads et voila!
06-25-2017, 05:33 PM
71V153

Quote:

Originally Posted by flabum1017

And if you pay $500 and open it up and find this?

Attachment 378658

I wouldn't pay $500 for that ...
06-25-2017, 05:35 PM
71V153

Seriously I've had pretty good luck on "junk" buys. Just gotta know what kinda junk ya wan't and how much yer willin to pay for it?

Show 40 post(s) from this thread on one page