Search found 26 matches

by ivansfo
Wed Oct 18, 2023 11:18 pm
Forum: PERFORMANCE
Topic: 23 CONQUEST Twin Yamaha F150 Engines
Replies: 36
Views: 28277

Re: 23 CONQUEST Twin Yamaha F150 Engines

I want to update and close out this thread. I have been focused on fishing and just getting acquainted with the new twin Yamaha F150 engines paired with Yamaha 3-bladed aluminum propellers. The 3-blade aluminum propellers run well, but I have been seeking to try the Mercury ENERTIA propeller. After ...
by ivansfo
Tue Apr 12, 2022 12:42 am
Forum: The GAM
Topic: 170 MONTAUK: Source for Front Accessory Panel Material
Replies: 3
Views: 646

Re: 170 MONTAUK: Source for Front Accessory Panel Material

Judging the the size of the new plug, can't you enlarge the hole panel to make it fit? If you need to source panel stock material, I recently found the material from a company called Decorative Plastics. I ordered a sheet of 3/16-inch Matte Black boat panel to mount new gauges. The panel looks and f...
by ivansfo
Wed Dec 22, 2021 12:11 am
Forum: PERFORMANCE
Topic: 23 CONQUEST Twin Yamaha F150 Engines
Replies: 36
Views: 28277

Re: 23 CONQUEST Twin Yamaha F150 Engines

The shadow effect of the gear case on propeller blades is something I never heard or read about. Thanks for the detailed explanation of that effect. These F150 engine are still very new to me; I'm still getting acquainted with how they run. The vibration with the OFS4 stainless steel four-blade prop...
by ivansfo
Sun Dec 19, 2021 2:24 pm
Forum: PERFORMANCE
Topic: 23 CONQUEST Twin Yamaha F150 Engines
Replies: 36
Views: 28277

Re: 23 CONQUEST Twin Yamaha F150 Engines

I have completed another round of propeller testing on San Francisco Bay. The propellers tested were a set of PowerTech OFS4 four-blade stainless steel propellers 15.25 x 15-pitch. Taking these propellers out of the box they felt heavy; I weight the propellers with the added Cushion Lok hubs on a ba...
by ivansfo
Fri Dec 10, 2021 5:37 pm
Forum: PERFORMANCE
Topic: 23 CONQUEST Twin Yamaha F150 Engines
Replies: 36
Views: 28277

Re: 23 CONQUEST Twin Yamaha F150 Engines

For the aluminum propellers tested earlier, at 5960-RPM boat speed was 49.2-MPH, and a new correct value for 4141-RPM boat speed was 33.3-MPH.
seaStateOnSFBay.jpg
Fig. 7. Wave height during test.
seaStateOnSFBay.jpg (24.75 KiB) Viewed 26890 times
by ivansfo
Fri Dec 10, 2021 5:35 pm
Forum: PERFORMANCE
Topic: 23 CONQUEST Twin Yamaha F150 Engines
Replies: 36
Views: 28277

Re: 23 CONQUEST Twin Yamaha F150 Engines

Early this week I calculated negative slip too which I could not figure out why. I just looked over my data and notice the 4000rpm was actually 4100rpm. MPH and RPM at WOT are accurate. The location of the test was South San Francisco Bay where there isn't a lot of current. We were in the shallows s...
by ivansfo
Tue Dec 07, 2021 2:10 pm
Forum: PERFORMANCE
Topic: 23 CONQUEST Twin Yamaha F150 Engines
Replies: 36
Views: 28277

Re: 23 CONQUEST Twin Yamaha F150 Engines

The dealer just gave me a pair of PowerTech stainless steel four-blade OFS4 propellers in 15.25 x 15-pitch. They are heavy and their weight seems comparable to a REVOLUTION4 propeller. I anticipate being able to run a sea trail within two weeks I am fairly satisfied with the performance of the Yamah...
by ivansfo
Sun Nov 28, 2021 1:41 am
Forum: PERFORMANCE
Topic: 23 CONQUEST Twin Yamaha F150 Engines
Replies: 36
Views: 28277

Re: 23 CONQUEST Twin Yamaha F150 Engines

Over the past weeks I installed the water pressure sensors, put 9 hours of them, and finally got out to test the motor/propellers. I'm pleased that the motors ran well as expected. I plan to discuss this data with my dealer to order the final set of stainless props. [Moderator's note: I hate picture...
by ivansfo
Sun Oct 17, 2021 1:26 am
Forum: PERFORMANCE
Topic: 23 CONQUEST Twin Yamaha F150 Engines
Replies: 36
Views: 28277

Re: 23 CONQUEST Twin Yamaha F150 Engines

Chuck, your tips on the 6Y9 gauge are timely. The 6Y9 I purchased was old stock the dealer had in inventory for a while. I did not plan for this gauge but was offered a good deal on it so why not. When I ran the engines for the first time, the 6Y9 gauge showed oil pressure and voltage but not water ...
by ivansfo
Fri Oct 15, 2021 2:29 pm
Forum: PERFORMANCE
Topic: 23 CONQUEST Twin Yamaha F150 Engines
Replies: 36
Views: 28277

Re: 23 CONQUEST Twin Yamaha F150 Engines

The Mercury OptiMax 150-HP engines were mounted one-hole-up by Boston Whaler. They ran well at this position but in rare cases, I felt the props would ventilate prematurely.
by ivansfo
Fri Oct 15, 2021 2:04 pm
Forum: PERFORMANCE
Topic: 23 CONQUEST Twin Yamaha F150 Engines
Replies: 36
Views: 28277

Re: 23 CONQUEST Twin Yamaha F150 Engines

Chuck and Jim. The REVOLUTION4 propellers I once had for the Mercury OptiMax engines are long gone. I resold them right away after seeing how massive they were. The last set of Mercury four-bladed propellers were sold with the old engines. In hindsight, I should have hung onto old propellers, but at...
by ivansfo
Thu Oct 14, 2021 6:06 pm
Forum: PERFORMANCE
Topic: 23 CONQUEST Twin Yamaha F150 Engines
Replies: 36
Views: 28277

Re: 23 Conquest repowered with twin Yamaha F150s

Conch-- I heard of Propgods long ago but wasn't aware they were still around. I'm checking out their forum now and there's a wealth of info there. Thanks for the tip. Regarding the REVOLUTION4 propeller, I actually bought one long ago to try with my Mercury 135-HP engines. Out of the box that prop w...
by ivansfo
Thu Oct 14, 2021 12:53 pm
Forum: PERFORMANCE
Topic: 23 CONQUEST Twin Yamaha F150 Engines
Replies: 36
Views: 28277

23 CONQUEST Twin Yamaha F150 Engines

I decided to re-power my 2001 23 Conquest with twin Yamaha F150 engines. A deposit was made in November 2020, and 11 agonizing months later, the new engines have finally been delivered and mounted, as seen below. 23ConquestF150-1b.jpg 23ConquestF150-2b.jpg The Yamaha F150 engines have a gear ratio o...
by ivansfo
Fri Aug 13, 2021 1:01 pm
Forum: The GAM
Topic: 2000 23 Conquest Purchase
Replies: 7
Views: 5287

Re: Congratulations on Purchase

Congratulations on your purchase of a 2000 Conquest 23. It's a great boat. I'm sure the CONQUEST 23 will bring your family lots of enjoyment. I have the original owner's manual for my 2001 Conquest 23. The manual is generic. I'll be happy to scan and send you a PDF copy. Post you questions [in the a...
by ivansfo
Tue Jun 29, 2021 11:03 pm
Forum: The GAM
Topic: Scarcity of New Outboard Engines
Replies: 21
Views: 10945

Re: Scarcity of New Outboard Engines

Count me in as one of those caught up in this mess. In Nov 2020 I ordered and paid for a pair of Yamaha F150 DECs to repower my Conquest. At the time of the order, the delivery date Yamaha gave was Jan 2021. An 8-10 week wait was acceptable to me because I don't boat during the winter. In Jan 2021, ...
by ivansfo
Tue Jun 29, 2021 10:34 pm
Forum: The GAM
Topic: 1998 23 CONQUEST Weight on Trailer Loaded
Replies: 5
Views: 4464

Re: 1998 23 CONQUEST Weight on Trailer Loaded

I have a 23 Conquest with the factory hardtop and twin Engines. I can attest the total tow weight is around 7,500 to 8,000-lbs. An old poster by the name of bsmotril had the same boat and he actually weighed his on a scale. https://continuouswave.com/ubb/Forum8/HTML/000692.html I initially towed wit...
by ivansfo
Sat Jun 12, 2021 2:57 pm
Forum: The GAM
Topic: 2000 23 Conquest Purchase
Replies: 7
Views: 5287

Re: Pre purchase 2000 23 Conquest Inspection

I'm the original [owner] of a 2001 23 Conquest with twin Mercury OptiMax 135-HP engines. The 23 CONQUEST is a sturdy boat, and I plan to keep it for a long time. I've only had to deal with these defects: ⋅ rusting Mercury outboard trim motor; replaced trim motors ⋅ tilt-trim asse...
by ivansfo
Thu Apr 22, 2021 12:25 am
Forum: REPAIRS and MODIFICATIONS
Topic: OEM Instrument Panel Plastic
Replies: 22
Views: 9461

Re: OEM Instrument Panel Plastic

The thickness of the plastic sheet for the panels as seen in Figure 11 surprises me. What is that dimension? Your cut for the curved upper edge of the panel looks good. Nice work with a jig saw. I suspect there was some sanding. I like the edge bevel on the panel. Thanks Jim. The plastic sheet I pu...
by ivansfo
Wed Apr 21, 2021 12:32 am
Forum: REPAIRS and MODIFICATIONS
Topic: OEM Instrument Panel Plastic
Replies: 22
Views: 9461

Re: OEM Instrument Panel Plastic

ASIDE ON A DIFFERENT PANEL: as I was working on the circuit breaker panel over the weekend, adried up label dropped from the circuit breaker panel. The original vendor for the circuit breaker panel was identified as Ultra Panel Marine in Miami, Florida. If anyone needs a circuit breaker panel from [...
by ivansfo
Mon Feb 22, 2021 3:52 pm
Forum: REPAIRS and MODIFICATIONS
Topic: OEM Instrument Panel Plastic
Replies: 22
Views: 9461

Re: OEM Instrument Panel Plastic

Can you detail the tools and techniques you used to produce the panels? ⋅ Traced out the new panel using the original panel as a template. ⋅ Cut out a new panel using a table saw for the straight edges. For non-straight edges, used a jig saw. Equipping the saws with fine tooth b...
by ivansfo
Mon Feb 22, 2021 12:50 pm
Forum: REPAIRS and MODIFICATIONS
Topic: OEM Instrument Panel Plastic
Replies: 22
Views: 9461

Re: OEM Instrument Panel Plastic

I am happy to report my new panel is done. I ordered the plastic sheet from Decorative Plastics (as mentioned earlier in the thread by kwik_wurk). https://shop.decorativeplasticsheets.com/main.sc A sheet cost about $80, and the sheet is large enough to make four or five panels in the size I need--en...
by ivansfo
Fri Dec 18, 2020 1:59 pm
Forum: The GAM
Topic: OptiMax--Almost Gone
Replies: 6
Views: 4338

Re: OptiMax--Almost Gone

I decided to say goodbye to the noise and exhaust smell of my 2002 135-HP Optimax engines. My new Yamaha F150 four-stroke-power-cycle engines should be here in Jan 2021.

The OptiMax engines had 650-hours of trouble-free running and had been super-reliable.
by ivansfo
Mon Dec 07, 2020 11:47 pm
Forum: REPAIRS and MODIFICATIONS
Topic: OEM Instrument Panel Plastic
Replies: 22
Views: 9461

Re: OEM Instrument Panel Plastic

kwik_wurk--thank you for mentioning Decorative Plastics, The have exactly what I'm seeking: the OEM style black ABS panel in the matt black finish . They even have a picture of a Whaler dash which looks so similar to mine. I've already contacted them for a sample chip. If the sample ends up matching...
by ivansfo
Sat Nov 28, 2020 1:33 pm
Forum: REPAIRS and MODIFICATIONS
Topic: OEM Instrument Panel Plastic
Replies: 22
Views: 9461

Re: OEM Instrument Panel Plastic

Thank you all for the feedback. I contacted the suggested marine surplus shop to see if they might have surplus panels from Whaler. Unfortunately they don't have the exact panel for the 23 Conquest. FP Marine said they can custom fabricate a panel for me that looks exactly the same. The process invo...
by ivansfo
Sun Nov 15, 2020 4:40 pm
Forum: REPAIRS and MODIFICATIONS
Topic: OEM Instrument Panel Plastic
Replies: 22
Views: 9461

Re: OEM Instrument Panel Plastic

Thank you Jim for the advice. I hadn't thought of using aluminum and sounds like it would look pretty clean if done right. I'm reluctant to try aluminum because I don't have any metal working tools. The stock panel has a slight bevel on the edge too which I should be able to replicate using a trim r...
by ivansfo
Sat Nov 14, 2020 4:01 pm
Forum: REPAIRS and MODIFICATIONS
Topic: OEM Instrument Panel Plastic
Replies: 22
Views: 9461

OEM Instrument Panel Plastic

What type of plastic [was used to make the instrument panel for a 2001 CONQUEST 23]? The finish in a matte black. panel.jpg TWO BACKSTORIES: ACTIVITY ON FORUM: I was a long time member from the old [forum] here. It's been a while since I have participated because of kids and life in general. I never...