Fuel Range for a Yanmar 27 hp
- Thread starter Jim Seamans
- Start date
- Status
356 range
Good question Jim! I'd guess I'm running 1/2-3/4 gal per hour, pushing a std 3 blade prop in mostly light seas, at 6-7 kts when underway. I've only got about 35 hours on the engine, including 3 5-8 hour runs at full cruise, and a lot of under 5 in the harbor. I've used less than 20 gals, indicated. BTW, it's a 40 gal tank
Good question Jim! I'd guess I'm running 1/2-3/4 gal per hour, pushing a std 3 blade prop in mostly light seas, at 6-7 kts when underway. I've only got about 35 hours on the engine, including 3 5-8 hour runs at full cruise, and a lot of under 5 in the harbor. I've used less than 20 gals, indicated. BTW, it's a 40 gal tank
Do Some Testing
I have a 34 with a 3GMF but I think you will find that fuel usage is similar. I burn about .75 gallons per hour at 26-2800 RPM. I would suggest you fill the tank, go motor for a specific time period (several hours) at your normal cruise RPM, and then refill the tank. Then the fuel burn is easy to calculate. We motored for about 18 hours over the Labor Day weekend. (Wind on the bow both ways) I have not filled the fuel tank since we got back but my calculations say it will take around 13.5 gallons. Don't fall into the trap of using miles as your gauge, use hours. You may be running 7 knots in flat water and no wind, and 4 knots in rough water against the wind. At a given RPM the engine is going to use about the same amount of fuel per hour, but the distance covered will be significantly different.
I have a 34 with a 3GMF but I think you will find that fuel usage is similar. I burn about .75 gallons per hour at 26-2800 RPM. I would suggest you fill the tank, go motor for a specific time period (several hours) at your normal cruise RPM, and then refill the tank. Then the fuel burn is easy to calculate. We motored for about 18 hours over the Labor Day weekend. (Wind on the bow both ways) I have not filled the fuel tank since we got back but my calculations say it will take around 13.5 gallons. Don't fall into the trap of using miles as your gauge, use hours. You may be running 7 knots in flat water and no wind, and 4 knots in rough water against the wind. At a given RPM the engine is going to use about the same amount of fuel per hour, but the distance covered will be significantly different.
Motor specs
The engine manual for the 27HP Yanmar states .95 gals @ 3500 rpm. That's around 6-7 knots. My vessel was delivered from Newburypoprt, Mass to Portland ME(70NM) on apx 13 gals. 4-6ft seas and 20knts wind on the bow all the way.
The engine manual for the 27HP Yanmar states .95 gals @ 3500 rpm. That's around 6-7 knots. My vessel was delivered from Newburypoprt, Mass to Portland ME(70NM) on apx 13 gals. 4-6ft seas and 20knts wind on the bow all the way.
- Status