jsmith0072 wrote:Q1: what is the first step to be taken to improve the time needed to reach planing speed?
You need to provide much more information about the boat's performance than just the remark that there is a "struggle" to reach planing speed.
Read this lengthy article:
Propeller Testing: What Data to Collect; How to Evaluate that Datahttps://continuouswave.com/forum/viewto ... f=7&t=7196Then collect all the data required as presented in that article, and post all of the data in a follow-up.
jsmith0072 wrote:Q2: is an E-TEC 115-HP engine the wrong choice for a 2001 DAUNTLESS 16?
I cannot image a better engine choice. A two-stroke-power-cycle direct-injected four-cylinder modern 115-HP engine like the E-TEC is a perfect match for re-powering an older boat.
Further, the 2001 DAUNTLESS 16 has a maximum engine power rating of 115-HP. The minimum engine power rating for the boat to be able to accelerate to planing speed was just 50-HP. On this basis alone, I cannot imagine that the boat would exhibit any problem is accelerating onto plane with 115-HP, as long as the engine was operating properly, the propeller was suitable, and the throttle settings were appropriate.
jsmith0072 wrote:Q3: can the engine mounting height be adjusted by me?
Altering the engine mounting height is only necessary if the existing engine mounting height is not favorable. Since you have not provided information on the engine mounting height, it is not yet appropriate to change the engine mounting height.
As for whether you you yourself can accomplish a change in engine mounting height, that depends entirely on your own skill and willingness to work on the boat. The weight involved with a four-cylinder engine is significant, and you probably do not have the proper lifting adaptor. It may be more appropriate for you to have the engine mounting height changed--if a change in engine mounting height turns out to be recommended--by a dealer.
jsmith0072 wrote:I am new to boats like this.
Your unfamiliarity with 16-foot outboard-powered boats can certainly be a factor in the way the boat is operated and how the boat performs. For this reason, I recommend you provide much more information before you undertake any further steps to effect a remedy for the "struggle" to reach planing speeds.
The "struggle" may be due to many factors that can be simple to fix, such as a more appropriate propeller, better engine trim, better throttle settings.