1st time boat owner

[Rumpel]

I have a 1966 Glaspar 16' with a 110 hp mercury two stroke.When I have two people on board the boat will do 35 miles an hour, when there is six people on board it barely does 5 miles an hour. I do understand the weight factor but I don't understand why the boat has six seats if you can't go any faster than 5 miles an hour with the Maxim hp rating for the boat. There is a manual adjustment on the motor mount to set the motor angle in the water, is this something that needs to changed with load in boat?

 

[Silvertip]

Re: 1st time boat owner

You can start by reading the "sticky" at the very top of this forum. After you've done that, you need to make sure the engine is making full power, making sure the throttle is opening the carbs all the way, making sure the link & sync procedure is correct on the motor, making sure the hull is clean, making sure you are not lugging around a boat load of water in the form of water soaked foam. Lastly, telling us what prop diameter and pitch is on the motor -- which is why I asked you to read the sticky note. You said you understand the "load" issue. But just because there are six seats does not mean you have enough engine to make the boat perform. You can buy a car with a four cylinder engine and you can by the same car with several sizes of V6's and perhaps even a V8. Even though all those cars have room for four, five or six people doesn't mean the 4 cylinder will perform the same as the V6 or V8 when you have any number of folks inside. Likewise, the number of people listed on the capacity plate is based on people weight of 125 - 150 pounds. Six 150 pounders is 900 pounds. Six 200 pounders is 1200 pounds. Just because you have seats for six does not mean you can safely carry six people. It's all about loading.

 

[Rumpel]

Re: 1st time boat owner

You can start by reading the "sticky" at the very top of this forum. After you've done that, you need to make sure the engine is making full power, making sure the throttle is opening the carbs all the way, making sure the link & sync procedure is correct on the motor, making sure the hull is clean, making sure you are not lugging around a boat load of water in the form of water soaked foam. Lastly, telling us what prop diameter and pitch is on the motor -- which is why I asked you to read the sticky note. You said you understand the "load" issue. But just because there are six seats does not mean you have enough engine to make the boat perform. You can buy a car with a four cylinder engine and you can by the same car with several sizes of V6's and perhaps even a V8. Even though all those cars have room for four, five or six people doesn't mean the 4 cylinder will perform the same as the V6 or V8 when you have any number of folks inside. Likewise, the number of people listed on the capacity plate is based on people weight of 125 - 150 pounds. Six 150 pounders is 900 pounds. Six 200 pounders is 1200 pounds. Just because you have seats for six does not mean you can safely carry six people. It's all about loading.

Thank you for the info, now one more question if I my. The motor has a pin that you can move to tilt the motor up when trailering and several positions that gradually lower it to full down. How do you determined which position or angle to lock in the motor when boating?

 

[steelespike]

Re: 1st time boat owner

You want the position that produces the best performance.Trimmed In(prop closer to the boat planes easier,bow will stay down producing a smoother ride but less speed.Trimming out (prop farther from boat)slower planing, higher bow, faster speed.usually the position that produces the best combination of performance is best.You may have to adjust trim based on what you are doing.in for loads,skiing etc.Out for lighter loads and speed etc.
Generally extremes in either direction aren't the best.
You may want to check that the throttle opens all the way and that all cylinders are firing.Vertical height is important if you have no ventilation problems the motor is probably too low.Generally the antiventilation plate(just above the prop) even with the bottom of the boat is considered a starting point.Raise it a little at a time to a point just before venting becomes a problem.An inch could net a couple of MPH and sightly better hole shot.
What size prop are you running (usually on the barrel of the prop._ _ X _ _.
diameter X pitch. pitch is the key number. If you know the prop size,max rpm and speed with typical load.we can tell how you are setup.

 

[Rumpel]

Re: 1st time boat owner

Thank you that makes scents, I can't wait to apply your advice.