Going from 25 hp to 35 hp

[jitterbug127]

My camera skills arn’t good. Not sure why my audio is like this. All the videos I took are like this.

 

[jimmbo]

Can the Spark jump a 3/8" Gap on both Cylinder?
Have you ever disconnect one of the Plugs and see how the engine runs under Load, then tried it with the other unhooked?
Is there any signs of Oil-Fuel running down from the top of the Block?
Is the Carb opening Fully?
How long have you owned this motor?
What Pitch is the Prop you have on it currently?

you have a 96 25hp. there is very little difference between it and a 35hp, if the 35 is a twin(though I'm pretty sure there was no 35 in 96, just the 30, of course there might be the Problem Child 3cylinder 35 of that era), as they would both have the same displacement and to get the higher HP, the Torque Curve was moved higher up the Rpm range, and HP is actually lower at lower Rpm. We used to have the 25 and 35 on 2 of the same hulls and very little difference

 

[saltchuckmatt]

Looks like it's running well to me.

 

[jitterbug127]

Looks like it's running well to me.

Thanks! She has run great for me.

 

[jitterbug127]

Can the Spark jump a 3/8" Gap on both Cylinder?
Have you ever disconnect one of the Plugs and see how the engine runs under Load, then tried it with the other unhooked?
Is there any signs of Oil-Fuel running down from the top of the Block?
Is the Carb opening Fully?
How long have you owned this motor?
What Pitch is the Prop you have on it currently?

you have a 96 25hp. there is very little difference between it and a 35hp, if the 35 is a twin(though I'm pretty sure there was no 35 in 96, just the 30, of course there might be the Problem Child 3cylinder 35 of that era), as they would both have the same displacement and to get the higher HP, the Torque Curve was moved higher up the Rpm range, and HP is actually lower at lower Rpm. We used to have the 25 and 35 on 2 of the same hulls and very little difference

Spark jumps a good gap. 3/8” yes. Both cylinders
I’ve not disconnected 1 plug like that before.
No signs of oil/fuel
I’ve owned motor 6 months I’d say
Carb opens fully.
I can check prop in daylight

 

[saltchuckmatt]

Edit: Solicitation is not allowed

 

[saltchuckmatt]

Whoa, sorry didn't know.

Giving away stuff for free is not allowed? Just so we are clear about this.

Matt

 

[jimmbo]

Whoa, sorry didn't know.

Giving away stuff for free is not allowed? Just so we are clear about this.

Matt

Not in the Public Forums.

 

[jitterbug127]

Thanks for informing me of the policy too! I’d never have thought of that as an issue.

 

[saltchuckmatt]

Thanks for clarifying.

 

[film495]

I don't know if it is advisable, but in that situation I've always wondered it trying a small kicker 3-4 hp, would be enough to get up on plane, and then the kicker can just be killed and pulled up. It might be a way to see if a 5hp jump in size will do what you're thinking before buying/selling. course you'd have to find a little motor to try.

I have a 25 hp on a 15 foot skiff, and with 2 or 3 people it will go faster than I would want to go in it, add a 4th person, and it laughs at the idea of planing out completely, motor wont rev up, should mess with different props, but never have.

 

[airshot]

I don't know if it is advisable, but in that situation I've always wondered it trying a small kicker 3-4 hp, would be enough to get up on plane, and then the kicker can just be killed and pulled up. It might be a way to see if a 5hp jump in size will do what you're thinking before buying/selling. course you'd have to find a little motor

 

[airshot]

Adding a small motor won't work, not at all. In fact it would be dangerous trying to tilt it up out of the way. The bigger motor's thrust will overpower the smaller and create a drag. HP increases must be done thru thrust at the prop.

 

[film495]

Adding a small motor won't work, not at all. In fact it would be dangerous trying to tilt it up out of the way. The bigger motor's thrust will overpower the smaller and create a drag. HP increases must be done thru thrust at the prop.

I'll add that to the list of ideas I've had that aren't any good. Lots of ideas, but some of them are stinkers. Curiousity killed the cat kind of thing.

 

[airshot]

I'll add that to the list of ideas I've had that aren't any good. Lots of ideas, but some of them are stinkers. Curiousity killed the cat kind of thing.

It is called learning !!