proping a Ranger 350V

[deepsessions]

I bought my '82 Ranger almost a month ago and bought it knowing it had launch problems. The boat gets on pad but it takes 8-10 seconds with a 19p prop. I thought it would be easy fix by taking the dolphins off and fixing the leak issue. NOT! I've since had my mechanic clean the carbs,take two trips to the water and we still can't figure it out. Tomarrow he is going to put a different fuel pump on to see if that is the cause but we are unsure as to why the plugs are getting fouled a little. I've been told by almost everyone to use a 23p Tempest for my boat,but he is suggesting that he tune the boat to use the 19 since I am running 4 batteries and a deck extension in the boat.

my question is....can tuning a boat like this with a 19p prop be a bad idea?

specs are 150 XR2 Merc Oil injected on an '82 350 V Ranger...I can run about 6000 rpm's at WOT but was told to keep it around 5500 max with this engine.

any help is appreciated!

 

[walleyehed]

Re: proping a Ranger 350V

I don't know of any problems running this engine at 6K...I would say 5800 would be a minumum to shoot for.
This hull also has very little natural bow-lift at speed so caution should be taken when chooosing a 4-bld for this set-up.
To get the most from any 4-bld, a jackplate is a must and a good amount of set-back seems to help this hull (atleast 10").
This is a tough hull to prop correctly..it needs the help of a 4-bld for hole-shot, then needs the speed and bow-lift of a 3-bld on top.
What 19P prop are you running now?

 

[Ron G]

Re: proping a Ranger 350V

What kind of leak did you have??if your foam ia saturated then your going from a heavy *** boat to an extremly heavy boat.aaaakenny will get ya proped out right.

 

[Texasmark]

Re: proping a Ranger 350V

Guys, This foam is sealed prior to hull-deck mating.

This is a Ranger, by Forrest Wood of Flippin, Ark., not some fly by night ghost chaser. Most of it is high in the boat because he built them for upright flotation. There is a sealed tunnel in the centerline of the boat to carry water back to the transom. For this boat to have wet foam problems, it would have to be completely full and sit for years.

If it sat that way for long, there should be a water mark on the transom (inside) so you can see just how high it was. Besides, he is keeping up with his buddy with a similar rig so he can't have much absorption.

Mark

 

[deepsessions]

Re: proping a Ranger 350V

I don't know of any problems running this engine at 6K...I would say 5800 would be a minumum to shoot for.
This hull also has very little natural bow-lift at speed so caution should be taken when chooosing a 4-bld for this set-up.
To get the most from any 4-bld, a jackplate is a must and a good amount of set-back seems to help this hull (atleast 10").
This is a tough hull to prop correctly..it needs the help of a 4-bld for hole-shot, then needs the speed and bow-lift of a 3-bld on top.
What 19P prop are you running now?

I just noticed this post sorry.....the prop we've been trying out is a 21 stainless (not sure of the manufacturer) and a ported 5 blade 23p...the 5 blade gets up a little faster but not much....the engine (Merc XR2 150) sits to holes lower than being even on the transom. One thing to note is this isn't the original motor for this boat. Between 2000-3000 is where the problem lies my mech said. I was told today by a different tech to raise the engine up a few notches then try prop tuning. My mech has a used 6" jack plate he could sell me for a good deal,but doesn't think it will cure the problem. Is this puting the cart before the horse? what prop can you recommend? I'm turning 5800 @ WOT the 21p stainless

 

[Texasmark]

Re: proping a Ranger 350V

This is Dhadley and Walleyehed territory. If they don't see your post, you might get a personal message to them.

Mark

 

[Dhadley]

Re: proping a Ranger 350V

I've experienced the same as Kenny. Those boats need all the bow lift they can get. Every one I've been involved with ended up with a 10" jackplate and a 3 blade Turbo Lightning. That seemed to give the most leverage and most bow lift. Great riding boat but it'll never be faster than a (speeding) Bullet. Or a Blazer or Ron's Bumble Bee. I don't think we can expect much from a 150 on that boat.

 

[deepsessions]

Re: proping a Ranger 350V

everyone ay? man that's bad news....but news none the less. what size 3 blade turbo? is the rear end too heavy combined with the lines underneath?

 

[walleyehed]

Re: proping a Ranger 350V

The hull is just not designed to lift clean...150 isn't helping, as a 200 would be better. The Turbo in a 21P will work if you go with a jackplate so you can get the engine up. and it's got to be up quite a bit to get to where you need to be...low-water pick-ups might be needed or we'd need to run a 19P insted.

 

[deepsessions]

Re: proping a Ranger 350V

The hull is just not designed to lift clean...150 isn't helping, as a 200 would be better. The Turbo in a 21P will work if you go with a jackplate so you can get the engine up. and it's got to be up quite a bit to get to where you need to be...low-water pick-ups might be needed or we'd need to run a 19P insted.

at the least what size jack plate? I've tried running with Dolphins and a 19p stainless and it yields the same results.

 

[walleyehed]

Re: proping a Ranger 350V

The tail foils are a tool and in this case they will not gain but maybe a bit on bottom end, yet cost you on top-end, even though you dropped pitch. This engine has to go up to find any gain....up and back I should say.
On that boat, I would go no less than 8" and with a 150, 10" would be better.
I'd highly recommend a look at Bob's Machine plates.

 

[deepsessions]

Re: proping a Ranger 350V

The tail foils are a tool and in this case they will not gain but maybe a bit on bottom end, yet cost you on top-end, even though you dropped pitch. This engine has to go up to find any gain....up and back I should say.
On that boat, I would go no less than 8" and with a 150, 10" would be better.
I'd highly recommend a look at Bob's Machine plates.

thank you I have an email into them.