very poor hole shot

[fish 4 life]

I don't know if this belongs in this category or not.

I have a 1985 Ranger 335V bass boat with a 1978 Evinrude 140 HP. I have been having trouble getting out of the hole. The only way I have been able to get out of the hole was to have two people sit at the front of the boat. When I do finally get on plane the boat does great and goes about 45 MPH. I did find out that when I turn the boat from side to side the RPM's build up and the boat gets on plane fairly quickly without having to have people shift their weight and sit at the front of the boat.

Why is the boat able to get out of the hole fairly quickly when I turn the boat from side to side?

 

[oldrudedude]

Re: very poor hole shot

Maybe you just have your engine trimmed up too much. Or your engine may sit too deep in the water in relation to the bottom of the transom. The anti-cavitation plate (which is just above the prop) should sit about level with the bottom of the transom.

Turning to the side increases the angle of the propeller shaft in relation to the horizon, puts the prop closer to the surface and brings the bow down.

 

[fish 4 life]

Re: very poor hole shot

Maybe you just have your engine trimmed up too much. Or your engine may sit too deep in the water in relation to the bottom of the transom. The anti-cavitation plate (which is just above the prop) should sit about level with the bottom of the transom.

Turning to the side puts the prop closer to the surface and brings the bow down.

I had the motor trimmed as far down as it would go. I thought the engine was too deep in the water as well. The AV plate was about even with the bottom of the boat, so I raised the motor one notch to where the AV plate is about an inch higher than the very bottom of the boat. The boat did seem to do better, but we still had to send people toward the front of the boat, but they did not have to sit as far up.

 

[oldrudedude]

Re: very poor hole shot

Where does the anti-cavitation plate of the motor sit in relation to the water surface when planing?

Motor tune?

Prop pitch?

Can you raise the motor another notch?

 

[fish 4 life]

Re: very poor hole shot

Where does the anti-cavitation plate of the motor sit in relation to the water surface when planing?

Motor tune?

Prop pitch?

Can you raise the motor another notch?

It is hard to tell where the AV plate is when the boat is planing. Am I just suppose to look over the back of the boat when it is moving and just be able to tell where the AV plate is?

What do you mean by motor tune? The motor has been checked out and carbs rebuilt. The mechanics say there is no problem with the engine and it runs like a top.

I tried the stock 13 X 19 SS 3 blade prop and a 13 X 17 SS 4 blade prop.

I could raise the motor 3 more notches.

I was thinking about getting a jack plate, mainly so the the motor will sit farther back in cleaner water.

 

[kenmyfam]

Re: very poor hole shot

Fine tune your set up. Loading, motor height (make sure it is still cooling if you raise it at all) trim setting. Has it always been like this ?? or is this a new outfit to you ??
On the dark side it could be full of water soaked flotation foam.

 

[mrcj001]

Re: very poor hole shot

Trim tabs will help to get the boat to plane faster....I had a simular problem, the trim tabs improved the all around performance of the boat.

 

[tashasdaddy]

Re: very poor hole shot

you have been asking this for a month. did you ever check for extra weight, FOAM. Balance the load in the boat????

 

[fish 4 life]

Re: very poor hole shot

you have been asking this for a month. did you ever check for extra weight, FOAM. Balance the load in the boat????

Actually I have been working on this problem for about 8 months. I did have the boat shop drill some hole and they found no water in the boat. I did tell him about how the boat gets on plane when I turn the boat from side to side. He thinks there is some water trapped somewhere where it is suppose to be sealed. He said he will drill some more holes in a different area. I was not too sure where he was talking about. He says he thinks when I turn the boat from side to side I am sloshing the water making it so the boat gets out of the hole.

Kenmyfam,

this is a new outfit to me.

 

[emdsapmgr]

Re: very poor hole shot

You have not mentioned what full throttle rpm's your engine runs with the props you have. Hard to determine just a solution till you know the top rpm's with the props you are trying. On that engine at full throttle, full trim, the correct prop should permit the engine to turn 5700-5800 rpm.

 

[Dhadley]

Re: very poor hole shot

In your other posts we determined the motor isn't running properly. Has that been corrected?

 

[kenmyfam]

Re: very poor hole shot

So this is a multiple thread same issue scenario.

 

[fish 4 life]

Re: very poor hole shot

You have not mentioned what full throttle rpm's your engine runs with the props you have. Hard to determine just a solution till you know the top rpm's with the props you are trying. On that engine at full throttle, full trim, the correct prop should permit the engine to turn 5700-5800 rpm.

With my 13 X 19 SS 3 blade prop WOT RPM's are about 5400.

With my 13 X 17 SS 4 blade prop WOT RPM's are about 5700.

 

[fish 4 life]

Re: very poor hole shot

In your other posts we determined the motor isn't running properly. Has that been corrected?

I have had the engine tuned, including rebuilt carbs, and multiple mechanics did tests on the engine and can't find anything wrong with the motor. They all say it runs like a top.

 

[fish 4 life]

Re: very poor hole shot

So this is a multiple thread same issue scenario.

Are you asking a question?

 

[jevery]

Re: very poor hole shot

Looking at the layout of the model, it appears fairly stern heavy.

And the engine's probably getting tired after 30+ years. I invest in some tabs.

 

[kenmyfam]

Re: very poor hole shot

Are you asking a question?

Just asking if this has been going on for a while in different threads. If so I can go find them and read up on them before posting any further responses.

 

[emdsapmgr]

Re: very poor hole shot

The 13 X 17 seems the best prop, as it gets the rpm's up and probably provides a better holeshot than the 19. What compression are you running? The paint sheme on that engine is more similar to an 83 or 84 model than a 78.

 

[kenmyfam]

Re: very poor hole shot

That outfit should fly out of the hole with either prop in my opinion.

Did we weigh the boat yet and compare to original spec's ???
I'm still on the water soaked foam thing !!!

 

[fish 4 life]

Re: very poor hole shot

The 13 X 17 seems the best prop, as it gets the rpm's up and probably provides a better holeshot than the 19. What compression are you running? The paint sheme on that engine is more similar to an 83 or 84 model than a 78.

Compression was at about 120 psi on all the cylinders.

If you are referring to the picture above of a Ranger, this is not my boat. It is jevery's. I have never posted a pick of the motor on this thread.