toyota 2h marine

[whitepointer23]

hello everyone, after several discussions on these forums the last few days regarding my twin ford v8's, whether to fit efi or leave them as they are and bite the bullet regarding fuel usage, i have made a decision. i am going to a marinize a pair of toyota 2 h diesels out of hj75 series landcruisers, they are a good simple inline 6, easy to make manifolds compared to a v motor. 107 hp at 3600 rpm, twins will give me about 18 knots top and 15 cruising which is the sort of speed i am after with good economy. these are engines plentiful in aus and good runners can be purchased for less than $1000. has anyone on the forum ever had one of these engines in a boat.

[Landlubber]

..from what I remember, they were direct copies of the 6 cyl Mercedes of the time....correct me please some mechanics....

[whitepointer23]

i have never heard that before, but you never know.

[Carteret]

According to Boat Diesel .com they were originally Hino base engines. Perhaps a Hino exhaust manifold and bell housing may fit? Worth a check

[Frosty]

The Toyota Landcruiser 1HD is the 250HP Yanmar 6LP ,I think it is 380Kilo. Yanmar use this engine to convert from old American iron.

Common engine here for big longtails is the Hino E700 I think is 180HP and looks simple as hell, runs like a clock and has similar appearance to the Ford lehman.

Anything to marinise these engines over here are off the shelf

I dont recognise the numbers you are using.

[whitepointer23]

the toyota that yanmar use is called a 1hz in aus, the 2h is the pushrod motor that was replaced by the 1 hz o'head cam. the 2h is a similar looking engine to a hino, you may have seen these motors in coaster bus and the longnose trucks toyota used to make, i think they were a 5 ton truck.

[Jim_Hbar]

WP23:

You've got your information correct regarding the 2H, and I believe it may even had been manufactured by HINO. The turbo, direct injection version of that engine is the 12HT.

The Yanmar 6LP is based on the Toyota 1HD, which is the turbo, direct injected engine. The 1HZ is the naturally aspirated version. The 1HZ and 1HD share the same block and crank, but have different con-rods, pistons and head... Externally they look the same, except for the turbo.

The 2H has higher torque at lower rpm than the 1HZ, and IIRC, a little heavier. It also tends to much better on fuel.. And being a sleeved engine, the 2H is much more rebuild-able. I believe it would make an ideal boat engine.

[whitepointer23]

you no your toyotas, i have a landcruiser with 1 hz motor and a friend of mine has a 12ht. as for economy the 2h uses a lot less than the 1hz thats why i think the 2h is a better choice plus they are cheap.

[whitepointer23]

Originally Posted by Carteret

According to Boat Diesel .com they were originally Hino base engines. Perhaps a Hino exhaust manifold and bell housing may fit? Worth a check

i would appreciate any info or links on hino marine diesels.

[Carteret]

Boat Diesel does have good data sheets and forums on the Hino and other engines and is well worth the membership fee. These fellows looked promising for manifolds: http://axemaster3.tripod.com/

[whitepointer23]

thanks for that, i had a look but the hino's are different to the 2h.