OMC V4 prop to fit a 3 cyl?

[fishfeatures]

I currently run a 15" prop but it's at the highest end of my recommended range at WOT. I have been offered a 19" that was on a V4 for free.

Will this fit my gearcase ? If not can any adjustments be done to it so it can.

I know I need a 17" but you can't borrow props over here from prop shops, so instead of buying one I'd just like to see how the 19" runs , if it's too much then I'll bite the bullet and buy a 17"

 

[steelespike]

Re: OMC V4 prop to fit a 3 cyl?

Remind us about your setup and performance specs. The diameter of the props would be a clue.
If you have a 3 cylinder did we establish if it was a large gear case?
The V4 dates back to 1958 do you know the year?
If your motor has the large gear case apparently a 90 hp V4 gear case 1981 and newer is the same part number here at boats.
You can look it up here based on your info and see if other hp will fit.
The 19 will likely take 600 to 800 rpm off the top with a corresponding reduction in hole shot
and load carrying response. With your layout might be a serious hole shot problem.
If it is a match give it a try nothing ventured nothing gained.

 

[fishfeatures]

Re: OMC V4 prop to fit a 3 cyl?

Remind us about your setup and performance specs. The diameter of the props would be a clue.
If you have a 3 cylinder did we establish if it was a large gear case?
The V4 dates back to 1958 do you know the year?
If your motor has the large gear case apparently a 90 hp V4 gear case 1981 and newer is the same part number here at boats.
You can look it up here based on your info and see if other hp will fit.
The 19 will likely take 600 to 800 rpm off the top with a corresponding reduction in hole shot
and load carrying response. With your layout might be a serious hole shot problem.
If it is a match give it a try nothing ventured nothing gained.

ok
13ft speed boat , approx 300kgs total weight , running gps 37 @5900
diameter is 13 3/4
1990 60hp johhnson , don't know if it's large gearcase or not , maybe you can tell me that one
19" prop is from early 80's i'm told
I currently have a great hole shot so am willinng to lose some of this if the prop worked.

am currently looking make a homemade jackplate from plans on the web that'll hopefully help run the bigger prop if it lugs the motor too much.


I can get the prop number from the person who is willing to give it to me if that helps???

thanks Steelespike.


K.

 

[steelespike]

Re: OMC V4 prop to fit a 3 cyl?

13 3/4 diameter indicates large gear case.
I looked up a 15" Solas prop for your 90, 60 hp. 13 1/2" X 15 - 2411-135-15
85, 90 hp 15" Solas prop is 13 1/2 X 15 - 2411-135-15.
!9" props will likely have a smaller diameter,
If the V4 had V6 gear case prop will have a diameter around 15"

 

[1FASTLASER]

Re: OMC V4 prop to fit a 3 cyl?

If he has the small gear case that I run on my 94 90hp his prop. Should fit and run ok.if memory serves me right some of the 3cylinder motors shared the same gear case as mine.

 

[fishfeatures]

Re: OMC V4 prop to fit a 3 cyl?

prop outer markings 13x19-k

inner markings on inner/outer hub connectors are 19K /6E5 /Y-2 A

If any of this helps figure out what gearcase it fits.

Am meant to pick it up tomorrow but if it doesn't suit then no point in grabbing it.

 

[steelespike]

Re: OMC V4 prop to fit a 3 cyl?

As near as I can tell your motor has a large gear case. the 13 3/4 X 15 says that"
If the 13 X 19 is from a V4 It should fit.
if you check prop sizes you will note that generally as pitch goes up diameter goes down.
It will be interesting to see the results of your test.

 

[fishfeatures]

Re: OMC V4 prop to fit a 3 cyl?

ok well picked up the prop, threw it on, went to the river,

and....
.
.
.
.
.
.
.
Nothing!!!!

the prop outer rim is the same circumference as my gearbox so it wouldn't slide all the way on. So I put a spacer on top of the washer and tightened up the prop , I know it's not the done thing but I still decided to try it. Any way too much exhaust must be exiting from it not fitting right as it wouldn't move away from the dock.

So does a v4 prop fit a 3 cyl... No they don't...


is there anyway I can adjust it to fit or will I give up on it until I have a v4/6 motor to put it on?

 

[steelespike]

Re: OMC V4 prop to fit a 3 cyl?

Thats a mystery unless your 13 3/4 in 15" prop is on a small gear case motor.
Typical small gear case motors us props about 12" diameter or a little less And they don't list a 19" here at boats
for the small gear case.
If you look up props for a 85 V4 and large gear case props for your motor they are the same part number.

 

[jimmbo]

Re: OMC V4 prop to fit a 3 cyl?

Just out of curiosity, what V4 did the prop come from? If it was a 140 I would need to know if it was a crossflow or a looper? Some off the V4 loopers do use the V6 gearcase and Props

 

[steelespike]

Re: OMC V4 prop to fit a 3 cyl?

I think the V6 gear case uses about a 15" diameter prop.

 

[jimmbo]

Re: OMC V4 prop to fit a 3 cyl?

I think the V6 gear case uses about a 15" diameter prop.

Ok I missed where Op said 13x19.

 

[fishfeatures]

Re: OMC V4 prop to fit a 3 cyl?

so is there anyway to make this fit so I can run it ?? botch it ?? or will I just hand it back...?

 

[jimmbo]

Re: OMC V4 prop to fit a 3 cyl?

Some 3 cylinders have the same size case as most post 1968 pre looper V4s, there a V4 prop will work. However some 3 cylinders use a smaller case which fits a smaller hub prop.
From what I've found the 1990 60 uses the same props as a V4
I haven't seen a model number for your motor, just to make sure I be looking in the right places

 

[steelespike]

Re: OMC V4 prop to fit a 3 cyl?

I do wonder what prop it is.
Do we know for a fact that it is a 13" diameter.
How big the the space?
You might try sizing the spacer so its just a sliver of a space.
Hard to believe it won't even move the boat?
Any chance the hub is completely shot as well?

 

[fishfeatures]

Re: OMC V4 prop to fit a 3 cyl?

Some 3 cylinders have the same size case as most post 1968 pre looper V4s, there a V4 prop will work. However some 3 cylinders use a smaller case which fits a smaller hub prop.
From what I've found the 1990 60 uses the same props as a V4
I haven't seen a model number for your motor, just to make sure I be looking in the right places

it's a J60ELESM

 

[fishfeatures]

Re: OMC V4 prop to fit a 3 cyl?

I do wonder what prop it is.
Do we know for a fact that it is a 13" diameter.
How big the the space?
You might try sizing the spacer so its just a sliver of a space.
Hard to believe it won't even move the boat?
Any chance the hub is completely shot as well?

I'll measure the diameter and will let you know what it is.

I did a shim so the prop was just barely not touching the gearcase , i couldn't tighten the porp nut any more or else it would just force the two onto each other, but the pin also went in place and the whole thing seemed to fit. When I went in the water it just wouldn't move, made a lot of noise but went nowhere. Now the hub seemed fit and not one bit worn but I mark it to see if it spins.

 

[steelespike]

Re: OMC V4 prop to fit a 3 cyl?

I assume your 13 3/4 X 15 fits around the gear case? And the 13 x 19 butts up to it.
Makes me wonder if it is for a small gear case motor though a 19" is very large.
In a brief check on the net I couldn't find a 19" for a small gear case.

 

[jimmbo]

Re: OMC V4 prop to fit a 3 cyl?

BRP #0390896 13x19

 

[fishfeatures]

Re: OMC V4 prop to fit a 3 cyl?

the 15" rim fits inside the gearcasing, about 1/4 inch or so it's a bit narrow at the rear of the prop. But your right with the 19" it just butts up aaginst the gearcase.