From the C-36 site:
Kubota Equivalents
Universal M-25 is a Kubota Block D850
Universal M-25XP is a Block D950
Universal M-25XPB is a Block D1005-D
Universal M-30 is a Block D1101 & D1102
Universal M4-30 is a Block Y850
Universal M-35, M-35A is a Block V1200
Universal M-35B is block V1305
Our Universal engines are marinized versions of the Kubota tractor engine. For instance, the D850, (M25) is in the B1550 Kubota tractor, the D950 engine (M25XP) is in the B7100 and B7200 Kubota tractors. The M35 engine (V1200) is in the B2150 and B9200 Kubota tractors, the M35B (V1305) is in the B2710.
M35 Thermostat:
180 Degree, Kubota #15531-73010
Gasket, Kubota #16851-73270
M35 Circulating Pump:
Pump: Kubota #16251-73034
Gasket: Kubota #16239-73430
M35 Injectors:
Kubota #700065209
Evidently there are two different pumps that fit this block - one has a 2-1/4" impeller and the other 2-3/4". Here's an excellent blog post from a C-36 owner on the subject: http://sv-silhouette.blogspot.ca/2014/01/the-engine-repair-november-2013.html
Kubota Equivalents
Universal M-25 is a Kubota Block D850
Universal M-25XP is a Block D950
Universal M-25XPB is a Block D1005-D
Universal M-30 is a Block D1101 & D1102
Universal M4-30 is a Block Y850
Universal M-35, M-35A is a Block V1200
Universal M-35B is block V1305
Our Universal engines are marinized versions of the Kubota tractor engine. For instance, the D850, (M25) is in the B1550 Kubota tractor, the D950 engine (M25XP) is in the B7100 and B7200 Kubota tractors. The M35 engine (V1200) is in the B2150 and B9200 Kubota tractors, the M35B (V1305) is in the B2710.
M35 Thermostat:
180 Degree, Kubota #15531-73010
Gasket, Kubota #16851-73270
M35 Circulating Pump:
Pump: Kubota #16251-73034
Gasket: Kubota #16239-73430
M35 Injectors:
Kubota #700065209
Evidently there are two different pumps that fit this block - one has a 2-1/4" impeller and the other 2-3/4". Here's an excellent blog post from a C-36 owner on the subject: http://sv-silhouette.blogspot.ca/2014/01/the-engine-repair-november-2013.html