Would Johnson V6 carburetor work on Johnson V4?

[Jeepcollector91]

I am almost finished parting out a 1982 Johnson 150 V6. I still have the carburetors and wanted to find out if they would work on a 1985 Johnson 115 V4 (I know I would only use two)? If so, would there be any performance loss or gain? The carburetors are clean and in great shape. They were removed from a running engine. I already swapped the power tilt/trim & the fuel primer onto my 115. If the carbs would work I would hang onto them as spares. If not then I will sell them.
Any info would be greatly appreciated.

 

[hidef]

Re: Would Johnson V6 carburetor work on Johnson V4?

The carbs will work you would have to change out the slow and high speed orifices

 

[Jeepcollector91]

Re: Would Johnson V6 carburetor work on Johnson V4?

Do you think they are worth keeping as spares? Or would I be better off selling them and getting carbs that are already set up for my engine.

 

[emdsapmgr]

Re: Would Johnson V6 carburetor work on Johnson V4?

Won't work. The carb bodies are the same, but the butterfly shaft lengths are different. The V4 crossflow carbs have butterfly shafts about 3/8" longer than a V6 carb.

 

[Jeepcollector91]

Re: Would Johnson V6 carburetor work on Johnson V4?

Won't work. The carb bodies are the same, but the butterfly shaft lengths are different. The V4 crossflow carbs have butterfly shafts about 3/8" longer than a V6 carb.

That's what I needed to know. I will go ahead and sell the 150 carbs. Thanks for all the help/info.

 

[Jeepcollector91]

Re: Would Johnson V6 carburetor work on Johnson V4?

I answered my own question the other day. I posted the '82 Johnson 150 carbs on craigslist for $60 and had someone ask me the bore size of the carbs. Turns out they are 1" bore. I then looked at my 115 carbs and they are 1-5/16" bore. So they wouldn't have worked anyway. Just bought another set of 1-5/16" bore carbs from a 1990 Evinrude 115 for $66 on ebay and am going to run them. The only difference between the '85 115 carbs & the '90 115 carbs is the newer set has plastic fuel bowls instead of aluminum. I guess I will rebuild my original set to keep for spares. Have a feeling I won't have the engine for more than a year due to the fact that Lake Powell is planning restrictions for motors that don't meet the '06 emissions. It will still work for where I live but not for where I travel to on vacations. Time to save my money. I just hope I can get some money out of the 1985 Johnson 115 & the 1966 Evinrude 60HP SportFour that originally came on my '66 Starcraft Jupiter.

Thanks everyone for the info.

 

[emdsapmgr]

Re: Would Johnson V6 carburetor work on Johnson V4?

The only problem with the carbs with the plastic bowls is that they warp over time, causing fuel leaks and (even worse) air leaks. Run the carbs with the aluminum bowls-that'l take avoid any problem.

 

[Jeepcollector91]

Re: Would Johnson V6 carburetor work on Johnson V4?

The only problem with the carbs with the plastic bowls is that they warp over time, causing fuel leaks and (even worse) air leaks. Run the carbs with the aluminum bowls-that'l take avoid any problem.

Thanks for the info.

I only plan to run this engine for this year then sell it. If I had more time to spend on it I would go ahead and buy the rebuild kits for the original carbs and run them. I am going to Lake Powell in May for my vacation and just want it to perform well. I will definitely rebuild them before I sell the motor and include them with it. I wish that I could keep the 115 on my Starcraft Jupiter forever but unfortunately it doesn't meet new emissions standards and more lakes are putting restrictions on them. I could keep using it at the coast but it looks like this year will be the last year it can be used in Lake Powell. The carbureted 2-stroke jet ski restriction took effect January 1st of this year and I checked with the park service to make sure I would be okay to use my outboard before towing the boat 2300 miles one way. They told me that there are currently no restrictions on outboards & inboards but that it was in the works for next year. As for a new motor I won't be able to afford to stick with 115HP and will most likely only buy a 60HP. I will miss the top speed I'm sure but imagine how much fuel I will save.

 

[rpsloan]

Re: Would Johnson V6 carburetor work on Johnson V4?

If you under power the boat your fuel mileage will be worse. As for the restrictions, welcome to my world. My 2005 I could take to Lake Skinner and Diamond Valley. Do to some issues I had to sell that boat. My 1971 with a '69 motor can't go there now. My solution is I just don't fish there unless I go on a friends boat. Why let one or two bodies of water dictate what you run?

 

[Jeepcollector91]

Re: Would Johnson V6 carburetor work on Johnson V4?

If you under power the boat your fuel mileage will be worse. As for the restrictions, welcome to my world. My 2005 I could take to Lake Skinner and Diamond Valley. Do to some issues I had to sell that boat. My 1971 with a '69 motor can't go there now. My solution is I just don't fish there unless I go on a friends boat. Why let one or two bodies of water dictate what you run?

My main reason for getting the boat was for Lake Powell & Lake Mead. I have yet to find another lake as beautiful as Lake Powell. My 1966 Starcraft Jupiter originally had a 60hp Evinrude SportFour and that motor loves drinking fuel. The boat is rated for 85HP max but since the 1985 Johnson 115HP weighs only a couple pounds more than the 1966 Evinrude 60HP and the 1985 85HP-140HP are basically the same weight I decided to overpower my 16' aluminum boat with the 115 that I already had. I bought the 115 with another boat & trailer for $200. Someone had a failed attempt at eliminating the VRO and the electric fuel pump they tried to hook up fried the wiring harness and the motor never made it back to the water. I installed a mechanical fuel pump and rewired the motor with part of a harness from the '82 Johnson 150 that I parted out. Also used the fuel primer from the 150. The motor ran great but the carbs still need to be cleaned/rebuilt.

I can use the 115 at the NC coast but I have been here most of my life and am bored with it. Nothing to do here. I had an apartment in Las Vegas, NV for a few years when I was an OTR Independent Contractor (truck driver) and absolutely love that area. My wife and I are planning to move to Pahrump, NV soon to be closer to all the stuff we enjoy. (Moab, Death Valley, Lake Mead, Lake Powell…...)

Now if I can find the 1966 Evinrude a new home that will get me closer to a new (emissions friendly) outboard. That motor has never been in salt water and spent its life on a private lake in Michigan. The motor was last winterized in 2005-or-6. Previous owner died and I bought the boat, motor, & trailer off ebay. I cleaned the points and the engine runs great but with no power t&t and since it's a pain to flush those old motors I decided not to take it to the coast.

I better stop rambling on now.

 

[rpsloan]

Re: Would Johnson V6 carburetor work on Johnson V4?

With that being the case then you should look for a two stroke Etech Evinrude, Mercury Optimax, Yamaha V-max or look for a 4 stroke by any of those manufacturers. Only problem with a four stroke is that they are heavy. I have experience with the Yamaha and Mercury 4 strokes and between the two I lean towards the Yamaha. Very quiet and fuel efficient. Down side unless you find a decent used one with controls, you will spend some bucks. Which leads to another thing to think about. Is it cheaper to repower or buy a newer boat with a emission compliant motor? I looked in to repower ring my 1971 and couldn't justify spending 10k on a 115 with controls and rigging.

Why stop at just Powell and Mead? Head across 95 to 6 in to CA and then north on 395. Some of the best free trout fishing in the country. There are a ton of lakes in the Eastern Sierra that are boat friendly. Crowley, Rock Creek, Convict, Diaz, Silver, Grant, Gull, June just to name a few plus Mammoth.

I too was an IC. Been across this country and up in to Canada hauling everything from general freight to machinery to windmill blades. Now I'm back in the oilfield yanking a tank.