Volvo Penta MD1b - flywheel

[Jeff Aitken]

I am in the process of adding an alternator to my engine, i am somewhat confused with where to run the belt. My flywheel has one V groove, a ring gear, and a flat-spot, as well as a smaller pulley attached to the front but a brass water pump is hooked to that. Is that the original flywheel?
Why does the dynastarter have two V-grooves? My plan was to keep the original starter and attach the alternator to a bracket on the fwd port of the engine.

anything helps, thanks. Jeff.

 

[Kukri]

I stand to be corrected by those who know more than I... My MD2 has a Dynastart with a two groove flywheel and the alternator, which is a later addition, has its own belt to a separate pulley bolted to the fore side of the flywheel .

 

[scottie]

Water pump is direct drive from camshaft normally
Small pulley inside flywheel is normally used for alternator.

 

[VicS]

Water pump is direct drive from camshaft normally
Small pulley inside flywheel is normally used for alternator.

The fresh water pump of an indirectly cooled engine engine may be belt driven from a flywheel mounted pulley. in that case to drive the alternator either a longer belt round both ( car style) or a double pulley is required.

Parts diagrams at http://www.marinepartseurope.com/en/volvo-penta-cat-7742090.aspx may be useful. The parts of the alternator kit are shown

Also workshop manual at http://www.bluemoment.com/downloads.html

and owners manual at http://www.volvopenta.com/volvopent...lication_search/pages/publication_search.aspx

 

[Tintin]

If you go off the large flywheel make sure you get a larger pulley on the alternator( or get one made) to avoid revving it too high.

 

[Jeff Aitken]

adding alternator to my md1b

thanks for the input boys... i found a couple styles of mounting brackets to use for my alternator. I believe they were off of an MD11. The bracket used the same bolt holes as the manual crank housing, and a crescent shaped tensioner bracket. I ended up facing the alternator pulley aft and running a small (23") belt between it and the spare pulley on the dynastarter (broken generator). Think that will be fine?

I bought a self exciting, delco alternator with a regulator built in.

the wooden boat festival is this weekend in maple bay, so ciao lots of work to do.

 

[Jeff Aitken]

MD1b

Ran a 43" belt around alternator, fore flywheel, and brass seawater pump pulley.

My other idea was out to lunch.

The small brass gear-style pump sucks from a forward through-hull and supplies my wet exhaust. While the "sea-water-pump" impels fluid through the water jacket from a coolant reservoir and circulates through my keel cooled engine/transmission system.

Wire and test alternator, install bilge and float tomorrow. Saturday morning launch.


18', 1938, "Brentwood Bay Fisherman", built in Victoria, BC.

"If anything's gonna happen it's gonna happen out there"