The 4LHA is no longer available (not compliant with EPA Tier III emissions) except as a like-for-like "replacement" engine (with EPA approval".I will give you a call, Any info on Yanmar 4 lha stp? The lv 250 is more advanced in Electronics??Measurements are metric? Need to measure my space between Stringers,,,, Thank You
Thank You. I will do some more research... Happy Holidays , Merry Christmas to all......Every car engine made today uses an ECU, marine engines are just catching up.
There is redundancy, safeties and built in power supplies for the ECU's.
reading the tech information and speaking to a knowledgeable marine professional like Jerry made the decision easy for me
Call Manny at the factory. What year is your Henriques? After about 1999, most were built with Yanmar 4LHA-DTE at 200 hp. An option was 4LHA-STP at 240 hp. I owned a 2003 with the 200 hp engines. I got an honest 22 knot cruise and 27 knot WOT. The Yanmars save about 500 pounds. In my opinion go Yanmar.I have a pair of TAMD 41P's (200 Hp) in my 28 Henriques. Toying with the idea of repowering when I sell the house and am considering these engines and the 275 Hp 4 cylinder John Deere engines. Would like something quieter and a little more speed.
I have the TAMD41P's, 200 HP, cruises 22 to 23 knots, good economy. I'm pretty happy with the Volvo's, but wouldn't mind more speed, and the Volvo's are LOUD. But I'm not going to get taken over the coals for anything I get. Their little engines, if they have a big engine price, I'll walk away.Call Manny at the factory. What year is your Henriques? After about 1999, most were built with Yanmar 4LHA-DTE at 200 hp. An option was 4LHA-STP at 240 hp. I owned a 2003 with the 200 hp engines. I got an honest 22 knot cruise and 27 knot WOT. The Yanmars save about 500 pounds. In my opinion go Yanmar.
Mine will hit 27 at WOT, haven't noticed any handling issues at that speed. Minimal use of the tabs is best with the hull. I see no reason she shouldn't be able to handle increased power, within reason. The keel is probably too small for the boat to climb up on.The Yanmars in my 2003 were very quiet. 78 db at 3,000 rpm cruise.
The 41P is a good engine. My guess is a complete re-power with either engine would be a $60,000 job. You could sell your Volvo's for $25,000 as running take outs.
My guess is the hull is not designed for 30 knot speed.
I hit 27 knots at WOT and the bow pushed down a lot and I had to raise the trim tabs full up.
Most of the boats I've been on that had broaching problems were either underpowered, had a high center of gravity or had keel issues. Or, "all of the above". Getting airborne with an inboard powered boat is more of an issue of excessive speed for the sea conditions.One issue straight shaft boats have is that the shaft angle wants to push the bow down, the faster the boat goes. I think the Henriques will ride fine at 30 knots in flat seas. 30 knots into a head sea will get you air born and running down swell would be in jeopardy of broaching. Just my opinion. I suggest you call Manny at the plant. He will give you the right advice.