Search found 9 matches

by gregdonohue
Sun Feb 11, 2018 3:45 am
Forum: PERFORMANCE
Topic: 255 Conquest Re-power with SUZUKI 200 APX Twins
Replies: 15
Views: 9913

Re: 255 Conquest Re-power with SUZUKI 200 APX Twins

[T]ook out the [255 CONQUEST] today with five adults and a small child onboard. The [twin Suzuki 200 APX engines accelerated to] 5,800-RPM. Top [boat] speed was 37-nautical-miles-per-hour into an [opposing current from] tide. I am very happy with the performance of the 15-1/4 x 22-pitch four-blade p...
by gregdonohue
Thu Feb 08, 2018 6:34 am
Forum: PERFORMANCE
Topic: 255 Conquest Re-power with SUZUKI 200 APX Twins
Replies: 15
Views: 9913

Re: 255 Conquest Re-power with SUZUKI 200 APX Twins

This morning, first run with the 20-pitch: --fantastic [acceleration] --top speed 39-nautical-miles-per-hour --engine over-rev Tomorrow will try out 22-pitch ([Vendor] sent a 22 and a 18 instead of a pair of 22's} We did take it out with a 20 and a 22; the engine with the 22 was hitting 5,950-RPM; 2...
by gregdonohue
Wed Feb 07, 2018 1:54 am
Forum: PERFORMANCE
Topic: 255 Conquest Re-power with SUZUKI 200 APX Twins
Replies: 15
Views: 9913

Re: 255 Conquest Re-power with SUZUKI 200 APX Twins

The props we are testing are:

--Suzuki 4 x 15 x 20
--Suzuki 3 x 16 x 21

So your thoughts are correct: 22-pitch might be too big.

Cheers Greg
by gregdonohue
Wed Feb 07, 2018 12:58 am
Forum: PERFORMANCE
Topic: 255 Conquest Re-power with SUZUKI 200 APX Twins
Replies: 15
Views: 9913

Re: 255 Conquest Re-power with SUZUKI 200 APX Twins

WOW--Thank you so much for the detailed replies.

The on-water test is tomorrow.

Yes, the engines are counter rotating engines. These can either spin-in or spin-out
Going for the traditional "out first up."

I will post up the results later.

Many thanks
by gregdonohue
Mon Feb 05, 2018 10:05 pm
Forum: PERFORMANCE
Topic: 255 Conquest Re-power with SUZUKI 200 APX Twins
Replies: 15
Views: 9913

Re: 255 Conquest Re-power with SUZUKI 200 APX Twins

Also [the 255 CONQUEST] liked to run faster; it fell off [hydroplane] around 17-nautical-miles-per-hour.
by gregdonohue
Mon Feb 05, 2018 10:04 pm
Forum: PERFORMANCE
Topic: 255 Conquest Re-power with SUZUKI 200 APX Twins
Replies: 15
Views: 9913

Re: 255 Conquest Re-power with SUZUKI 200 APX Twins

Thanks for you reply. The boat is a [2002] 255 CONQUEST. The old engines were Mercury 150 OptiMax with 17-pitch propellers. Top speed was 30-nautical-miles-per-hour, [and the engine speed ] couldn't get over 5,100-RPM--over-propped in my opinion and terrible on fuel and oil. [The 255 CONQUEST] is ve...
by gregdonohue
Mon Feb 05, 2018 3:57 am
Forum: PERFORMANCE
Topic: 255 Conquest Re-power with SUZUKI 200 APX Twins
Replies: 15
Views: 9913

255 Conquest Re-power with SUZUKI 200 APX Twins

I'm in the process of putting twin Suzuki 200APX engines on my [255 CONQUEST].

[I am deciding between propellers with] three-blades or four-blades and their pitch.

I mainly go angling offshore at 30-miles-out and troll at 6- to 7-nautical-miles-per-hour.

Any thoughts?
Cheers Greg
by gregdonohue
Tue Oct 03, 2017 1:54 am
Forum: REPAIRS and MODIFICATIONS
Topic: 255 CONQUEST Install New Cables to Hardtop
Replies: 3
Views: 2706

Re: 255 CONQUEST Install New Cables to Hardtop

Many thanks for your reply. It is inside the cabin I need to remove the headliner as to get access to the hole going through to the tubular up top .
Cheers
by gregdonohue
Mon Oct 02, 2017 2:06 am
Forum: REPAIRS and MODIFICATIONS
Topic: 255 CONQUEST Install New Cables to Hardtop
Replies: 3
Views: 2706

255 CONQUEST Install New Cables to Hardtop

I need to run a new cable up to the hardtop [on a Boston Whaler 255 CONQUEST boat]. Looks like I need to remove the hard shell roof liner. Any tips on how to achieve this without any damage? Many thanks .